fix crash where account name > 12 chars, tested with long account name

Merge branch 'master' of bitbucket.org:bluetradesys/spark into excel_algos
range to vector mapping
2019-07-11 17:51:45 -04:00 · 2019-07-11 14:59:19 -04:00 · 2019-07-11 14:15:06 -04:00 · 2019-07-11 10:45:10 -04:00 · 2019-07-11 14:23:13 +00:00 · 2019-07-11 14:18:45 +00:00
553 changed files with 24612 additions and 6413 deletions
@@ -32,3 +32,4 @@ trace_data/
 /src/lib/orderman/perf_analysis/last_pretty_log.csv
 /src/lib/orderman/perf_analysis/log.csv
 /doc/user/public/*
+.ionide/*
@@ -1,83 +1,14 @@
 {
    "version": "0.2.0",
    "configurations": [
-
-        {
-            "name": "(gdb) Launch",
-            "type": "cppdbg",
-            "request": "launch",
-            "program": "${workspaceRoot}/build/ninja_debug/server/sparkd/sparkd",
-            "args": ["run"],
-            "stopAtEntry": false,
-            "cwd": "${workspaceRoot}/build/ninja_debug/src/server/sparkd",
-            "environment": [],
-            "externalConsole": true,
-            "MIMode": "gdb",
-            "setupCommands": [
-                {
-                    "description": "Enable pretty-printing for gdb",
-                    "text": "-enable-pretty-printing",
-                    "ignoreFailures": true
-                }
-            ]
-        },
-        {
-         "name": "Client Launch",
-         "type": "clr",
-         "request": "launch",
-         "program": "${workspaceRoot}/build/Debug/bin/net471/spark.exe",
-         "args": [],
-         "cwd": "${workspaceRoot}",
-         "stopAtEntry": false,
-         "externalConsole": true,
-         "requireExactSource": false
-        },
-      {
-         "name": "SDK Launch",
-         "type": "clr",
-         "request": "launch",
-         "program": "${workspaceRoot}/build/Debug/bin/net471/spark_sdk.exe",         
-         "args": ["md","GLBX","Future","CL", "CLZ9", "--user=bts", "--pass="],
-         "cwd": "${workspaceRoot}",
-         "stopAtEntry": false,
-         "externalConsole": true,
-         "requireExactSource": false
-      },        
-      {
-         "name": "Excel Launch",
-         "type": "clr",
-         "request": "launch",
-         "program": "C:/Program Files/Microsoft Office/Office14/EXCEL.EXE",
-         "args": ["${workspaceRoot}/build/Debug/bin/net471/spark_excel-addin64-packed.xll"],
-         "cwd": "${workspaceRoot}",
-         "stopAtEntry": false,
-         "externalConsole": true,
-         "requireExactSource": false
-      },          
-      {
-         "name": "Client Tests",
-         "type": "clr",
-         "request": "launch",
-         "program": "${workspaceRoot}/build/Debug/bin/net471/sparkcmd.exe",
-         "args": ["test","test_filter"],
-         "cwd": "${workspaceRoot}",
-         "stopAtEntry": false,
-         "externalConsole": true,
-         "requireExactSource": false
-      },           
-      {
-            "name": "Client Attach",
-            "type": "clr",
-            "request": "attach",
-            "processId":"${command:pickProcess}"
-        },
        {
            "name": "SparkVM Launch",
            "type": "cppdbg",
            "request": "launch",
-            
            "program": "/home/bts/spark/build/ninja_debug/server/sparkd",
-            "args": ["run"],
+            "args": [
+                "run"
+            ],
            "stopAtEntry": false,
            "cwd": "/home/bts/spark/build/ninja_debug/server/",
            "environment": [],
@@ -102,24 +33,113 @@
                    "description": "LD LIBRARY",
                    "text": "set env LD_LIBRARY_PATH=.",
                    "ignoreFailures": false
-                }                
+                }
            ],
            "pipeTransport": {
                "pipeCwd": "${workspaceRoot}",
                "pipeProgram": "c:\\program files\\git\\usr\\bin\\ssh.exe",
-                "pipeArgs": ["bts@sparkvm"],
+                "pipeArgs": [
+                    "bts@sparkvm"
+                ],
                "debuggerPath": "/usr/bin/gdb"
            },
            "sourceFileMap": {
                "/home/bts/spark/": "${workspaceRoot}"
            }
        },
+        {
+            "name": "(gdb) Launch",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${workspaceRoot}/build/ninja_debug/server/sparkd/sparkd",
+            "args": [
+                "run"
+            ],
+            "stopAtEntry": false,
+            "cwd": "${workspaceRoot}/build/ninja_debug/src/server/sparkd",
+            "environment": [],
+            "externalConsole": true,
+            "MIMode": "gdb",
+            "setupCommands": [
+                {
+                    "description": "Enable pretty-printing for gdb",
+                    "text": "-enable-pretty-printing",
+                    "ignoreFailures": true
+                }
+            ]
+        },
+        {
+            "name": "Client Launch",
+            "type": "clr",
+            "request": "launch",
+            "program": "${workspaceRoot}/build/Debug/bin/net471/spark.exe",
+            "args": [],
+            "cwd": "${workspaceRoot}",
+            "stopAtEntry": false,
+            "externalConsole": true,
+            "requireExactSource": false
+        },
+        {
+            "name": "SDK Launch",
+            "type": "clr",
+            "request": "launch",
+            "program": "${workspaceRoot}/build/Debug/bin/net471/spark_sdk.exe",
+            "args": [
+                "md",
+                "GLBX",
+                "Future",
+                "CL",
+                "CLZ9",
+                "--user=bts",
+                "--pass="
+            ],
+            "cwd": "${workspaceRoot}",
+            "stopAtEntry": false,
+            "externalConsole": true,
+            "requireExactSource": false
+        },
+        {
+            "name": "Excel Launch",
+            "type": "clr",
+            "request": "launch",
+            "program": "C:/Program Files/Microsoft Office/Office14/EXCEL.EXE",
+            "args": [
+                "${workspaceRoot}/build/Debug/bin/net471/spark_excel-addin64.xll"
+            ],
+            "cwd": "${workspaceRoot}",
+            "stopAtEntry": false,
+            "externalConsole": true,
+            "requireExactSource": false
+        },
+        {
+            "name": "Client Tests",
+            "type": "clr",
+            "request": "launch",
+            "program": "${workspaceRoot}/build/Debug/bin/net471/sparkcmd.exe",
+            "args": [
+                "test",
+                "test_filter"
+            ],
+            "cwd": "${workspaceRoot}",
+            "stopAtEntry": false,
+            "externalConsole": true,
+            "requireExactSource": false
+        },
+        {
+            "name": "Client Attach",
+            "type": "clr",
+            "request": "attach",
+            "processId": "${command:pickProcess}"
+        },
        {
            "name": "Spreader Tests",
            "type": "cppdbg",
            "request": "launch",
            "program": "/home/bts/spark/build/ninja_debug/src/server/sparkd/sparkd",
-            "args": ["test", "[spreader]"],
+            "args": [
+                "test",
+                "[spreader]"
+            ],
            "stopAtEntry": false,
            "cwd": "/home/bts/spark/build/ninja_debug/src/server/sparkd/",
            "environment": [],
@@ -139,7 +159,9 @@
            "pipeTransport": {
                "pipeCwd": "${workspaceRoot}",
                "pipeProgram": "c:\\program files\\git\\usr\\bin\\ssh.exe",
-                "pipeArgs": ["bts@sparkvm"],
+                "pipeArgs": [
+                    "bts@sparkvm"
+                ],
                "debuggerPath": "/usr/bin/gdb"
            },
            "sourceFileMap": {
@@ -151,7 +173,10 @@
            "type": "cppdbg",
            "request": "launch",
            "program": "/home/bts/spark/build/ninja_debug/src/server/sparkd/sparkd",
-            "args": ["test", "[admin_service]"],
+            "args": [
+                "test",
+                "[admin_service]"
+            ],
            "stopAtEntry": false,
            "cwd": "/home/bts/spark/build/ninja_debug/src/server/sparkd/",
            "environment": [],
@@ -171,7 +196,9 @@
            "pipeTransport": {
                "pipeCwd": "${workspaceRoot}",
                "pipeProgram": "c:\\program files\\git\\usr\\bin\\ssh.exe",
-                "pipeArgs": ["bts@sparkvm"],
+                "pipeArgs": [
+                    "bts@sparkvm"
+                ],
                "debuggerPath": "/usr/bin/gdb"
            },
            "sourceFileMap": {
@@ -183,7 +210,10 @@
            "type": "cppdbg",
            "request": "launch",
            "program": "/home/bts/spark/build/ninja_debug/src/server/sparkd/sparkd",
-            "args": ["test", "[limiter]"],
+            "args": [
+                "test",
+                "[limiter]"
+            ],
            "stopAtEntry": false,
            "cwd": "/home/bts/spark/build/ninja_debug/src/server/sparkd/",
            "environment": [],
@@ -203,7 +233,9 @@
            "pipeTransport": {
                "pipeCwd": "${workspaceRoot}",
                "pipeProgram": "c:\\program files\\git\\usr\\bin\\ssh.exe",
-                "pipeArgs": ["bts@sparkvm"],
+                "pipeArgs": [
+                    "bts@sparkvm"
+                ],
                "debuggerPath": "/usr/bin/gdb"
            },
            "sourceFileMap": {
@@ -215,7 +247,10 @@
            "type": "cppdbg",
            "request": "launch",
            "program": "/home/bts/spark/build/ninja_debug/server/sparkd",
-            "args": ["test", "[mbo]"],
+            "args": [
+                "test",
+                "SingleWriterConcurrentVector"
+            ],
            "stopAtEntry": false,
            "cwd": "/home/bts/spark/build/ninja_debug/server/",
            "environment": [],
@@ -240,14 +275,16 @@
            "pipeTransport": {
                "pipeCwd": "${workspaceRoot}",
                "pipeProgram": "c:\\program files\\git\\usr\\bin\\ssh.exe",
-                "pipeArgs": ["bts@sparkvm"],
+                "pipeArgs": [
+                    "bts@sparkvm"
+                ],
                "debuggerPath": "/usr/bin/gdb"
            },
            "sourceFileMap": {
                "/home/bts/spark/": "${workspaceRoot}"
            }
        },
-         {
+        {
            "name": "SparkVM attach",
            "type": "cppdbg",
            "request": "attach",
@@ -255,16 +292,18 @@
            "processId": "${command:pickRemoteProcess}",
            "MIMode": "gdb",
            "pipeTransport": {
-               "pipeCwd": "${workspaceRoot}",
-               "pipeProgram": "c:\\program files\\git\\usr\\bin\\ssh.exe",
-               "pipeArgs": ["bts@sparkvm"],
-               "debuggerPath": "/usr/bin/gdb"
+                "pipeCwd": "${workspaceRoot}",
+                "pipeProgram": "c:\\program files\\git\\usr\\bin\\ssh.exe",
+                "pipeArgs": [
+                    "bts@sparkvm"
+                ],
+                "debuggerPath": "/usr/bin/gdb"
            },
            "sourceFileMap": {
-               "/home/bts/spark/": "${workspaceRoot}"
+                "/home/bts/spark/": "${workspaceRoot}"
            }
-         },
-         {
+        },
+        {
            "name": "Python",
            "type": "python",
            "request": "launch",
@@ -274,12 +313,59 @@
            "cwd": "${workspaceRoot}",
            "env": {},
            "envFile": "${workspaceRoot}/.env",
-            "args": [ "DEBUG" ],
+            "args": [
+                "DEBUG"
+            ],
            "debugOptions": [
                "WaitOnAbnormalExit",
                "WaitOnNormalExit",
                "RedirectOutput"
            ]
        },
+        {
+            "name": ".NET Core Remote Attach",
+            "type": "coreclr",
+            "request": "attach",
+            "processId": "${command:pickRemoteProcess}",
+            "pipeTransport": {
+                "pipeProgram": "c:\\program files\\git\\usr\\bin\\ssh.exe",
+                "pipeArgs": [
+                    "bts@sparkvm"
+                ],
+                "debuggerPath": "/home/bts/vsdbg/vsdbg",
+                "pipeCwd": "${workspaceRoot}",
+                "quoteArgs": true
+            },
+            "sourceFileMap": {
+                "/home/bts/spark/": "${workspaceRoot}"
+            },
+            "justMyCode": true
+        },
+        {
+            "name": ".NET Core Remote Launch",
+            "type": "coreclr",
+            "request": "launch",
+            "program": "/usr/bin/dotnet",
+            "args": [
+                "sparkcmd.dll",
+                "test",
+                "test_join_create_and_takeout_market"
+            ],
+            "stopAtEntry": false,
+            "cwd": "/home/bts/spark/build/ninja_debug/server",
+            "pipeTransport": {
+                "pipeProgram": "c:\\program files\\git\\usr\\bin\\ssh.exe",
+                "pipeArgs": [
+                    "bts@sparkvm"
+                ],
+                "debuggerPath": "/home/bts/vsdbg/vsdbg",
+                "pipeCwd": "${workspaceRoot}",
+                "quoteArgs": true
+            },
+            "sourceFileMap": {
+                "/home/bts/spark/": "${workspaceRoot}"
+            },
+            "justMyCode": false
+        },
    ]
 }
@@ -1 +1 @@
-set(sources /home/ppinto/Dropbox/bts/spark/doc/user/build.sh;content/_index.md;content/bts_spark/Algos/_index.md;content/bts_spark/Glossary/index.md;content/bts_spark/Help/about_spark.png;content/bts_spark/Help/image39.png;content/bts_spark/Help/image58.png;content/bts_spark/Help/index.md;content/bts_spark/Launcher/image38.png;content/bts_spark/Launcher/image68.png;content/bts_spark/Launcher/index.md;content/bts_spark/Logging-In-to-the-System/image3.png;content/bts_spark/Logging-In-to-the-System/image64.png;content/bts_spark/Logging-In-to-the-System/index.md;content/bts_spark/Market/change_securities.png;content/bts_spark/Market/image11.png;content/bts_spark/Market/image14.png;content/bts_spark/Market/image20.png;content/bts_spark/Market/image21.png;content/bts_spark/Market/image23.png;content/bts_spark/Market/image24.png;content/bts_spark/Market/image34.png;content/bts_spark/Market/image49.png;content/bts_spark/Market/image53.png;content/bts_spark/Market/image66.png;content/bts_spark/Market/image69.png;content/bts_spark/Market/index.md;content/bts_spark/Market/market_view.png;content/bts_spark/Market/settings_icon.png;content/bts_spark/Market/time_and_sales.png;content/bts_spark/My-Windows/image15.png;content/bts_spark/My-Windows/image16.png;content/bts_spark/My-Windows/image37.png;content/bts_spark/My-Windows/index.md;content/bts_spark/Settings/image51.png;content/bts_spark/Settings/image9.png;content/bts_spark/Settings/index.md;content/bts_spark/Spreader/image10.png;content/bts_spark/Spreader/image13.png;content/bts_spark/Spreader/image18.png;content/bts_spark/Spreader/image19.png;content/bts_spark/Spreader/image28.png;content/bts_spark/Spreader/image29.png;content/bts_spark/Spreader/image31.png;content/bts_spark/Spreader/image35.png;content/bts_spark/Spreader/image40.png;content/bts_spark/Spreader/image43.png;content/bts_spark/Spreader/image54.png;content/bts_spark/Spreader/image55.png;content/bts_spark/Spreader/image56.png;content/bts_spark/Spreader/image6.png;content/bts_spark/Spreader/image7.png;content/bts_spark/Spreader/image70.png;content/bts_spark/Spreader/image72.png;content/bts_spark/Spreader/image8.png;content/bts_spark/Spreader/index.md;content/bts_spark/Trading/algo_studio.png;content/bts_spark/Trading/collapse_all_icon.png;content/bts_spark/Trading/cover_algo_control.png;content/bts_spark/Trading/expand_all_icon.png;content/bts_spark/Trading/image1.png;content/bts_spark/Trading/image17.png;content/bts_spark/Trading/image2.png;content/bts_spark/Trading/image25.png;content/bts_spark/Trading/image27.png;content/bts_spark/Trading/image33.png;content/bts_spark/Trading/image42.png;content/bts_spark/Trading/image44.png;content/bts_spark/Trading/image47.png;content/bts_spark/Trading/image48.png;content/bts_spark/Trading/image5.png;content/bts_spark/Trading/image50.png;content/bts_spark/Trading/image52.png;content/bts_spark/Trading/image57.png;content/bts_spark/Trading/image59.png;content/bts_spark/Trading/image60.png;content/bts_spark/Trading/image61.png;content/bts_spark/Trading/image62.png;content/bts_spark/Trading/image73.png;content/bts_spark/Trading/image74.png;content/bts_spark/Trading/index.md;content/bts_spark/Trading/join_algo_control.png;content/bts_spark/Trading/ladder.png;content/bts_spark/Trading/ladder_badges.png;content/bts_spark/Trading/ladder_main_part.png;content/bts_spark/Trading/lean_algo_control.png;content/bts_spark/Trading/mini_orderbook.png;content/bts_spark/Trading/oco_algo_control.png;content/bts_spark/Trading/offset_algo_control.png;content/bts_spark/Trading/pnl_calculation.png;content/bts_spark/Trading/pnl_window.png;content/bts_spark/Trading/recreate_icon.png;content/bts_spark/Trading/settings_icon.png;content/bts_spark/Trading/spark_menu_order_book.png;content/bts_spark/Trading/top_algo_control.png;content/bts_spark/Trading/trigger_algo_control.png;content/bts_spark/_index.md;content/release_notes/_index.md;static/book.js;static/favicon.ico;static/image.js;templates/index.html;templates/page.html;templates/section.html;templates/shortcodes/back_button.html)
+set(sources /home/ppinto/Dropbox/bts/spark/doc/user/build.sh;content/_index.md;content/bts_spark/Algos/_index.md;content/bts_spark/Glossary/index.md;content/bts_spark/Help/about_spark.png;content/bts_spark/Help/image39.png;content/bts_spark/Help/image58.png;content/bts_spark/Help/index.md;content/bts_spark/Launcher/image38.png;content/bts_spark/Launcher/image68.png;content/bts_spark/Launcher/index.md;content/bts_spark/Logging-In-to-the-System/image3.png;content/bts_spark/Logging-In-to-the-System/image64.png;content/bts_spark/Logging-In-to-the-System/index.md;content/bts_spark/Market/change_securities.png;content/bts_spark/Market/image11.png;content/bts_spark/Market/image14.png;content/bts_spark/Market/image20.png;content/bts_spark/Market/image21.png;content/bts_spark/Market/image23.png;content/bts_spark/Market/image24.png;content/bts_spark/Market/image34.png;content/bts_spark/Market/image49.png;content/bts_spark/Market/image53.png;content/bts_spark/Market/image66.png;content/bts_spark/Market/image69.png;content/bts_spark/Market/index.md;content/bts_spark/Market/market_view.png;content/bts_spark/Market/settings_icon.png;content/bts_spark/Market/time_and_sales.png;content/bts_spark/My-Windows/image15.png;content/bts_spark/My-Windows/image16.png;content/bts_spark/My-Windows/image37.png;content/bts_spark/My-Windows/index.md;content/bts_spark/Settings/image51.png;content/bts_spark/Settings/image9.png;content/bts_spark/Settings/index.md;content/bts_spark/Spreader/image10.png;content/bts_spark/Spreader/image13.png;content/bts_spark/Spreader/image18.png;content/bts_spark/Spreader/image19.png;content/bts_spark/Spreader/image28.png;content/bts_spark/Spreader/image29.png;content/bts_spark/Spreader/image31.png;content/bts_spark/Spreader/image35.png;content/bts_spark/Spreader/image40.png;content/bts_spark/Spreader/image43.png;content/bts_spark/Spreader/image54.png;content/bts_spark/Spreader/image55.png;content/bts_spark/Spreader/image56.png;content/bts_spark/Spreader/image6.png;content/bts_spark/Spreader/image7.png;content/bts_spark/Spreader/image70.png;content/bts_spark/Spreader/image72.png;content/bts_spark/Spreader/image8.png;content/bts_spark/Spreader/index.md;content/bts_spark/Trading/algo_studio.png;content/bts_spark/Trading/collapse_all_icon.png;content/bts_spark/Trading/cover_algo_control.png;content/bts_spark/Trading/expand_all_icon.png;content/bts_spark/Trading/image1.png;content/bts_spark/Trading/image17.png;content/bts_spark/Trading/image2.png;content/bts_spark/Trading/image25.png;content/bts_spark/Trading/image27.png;content/bts_spark/Trading/image33.png;content/bts_spark/Trading/image42.png;content/bts_spark/Trading/image44.png;content/bts_spark/Trading/image47.png;content/bts_spark/Trading/image48.png;content/bts_spark/Trading/image5.png;content/bts_spark/Trading/image50.png;content/bts_spark/Trading/image52.png;content/bts_spark/Trading/image57.png;content/bts_spark/Trading/image59.png;content/bts_spark/Trading/image60.png;content/bts_spark/Trading/image61.png;content/bts_spark/Trading/image62.png;content/bts_spark/Trading/image73.png;content/bts_spark/Trading/image74.png;content/bts_spark/Trading/index.md;content/bts_spark/Trading/join_algo_control.png;content/bts_spark/Trading/ladder.png;content/bts_spark/Trading/ladder_badges.png;content/bts_spark/Trading/ladder_main_part.png;content/bts_spark/Trading/lean_algo_control.png;content/bts_spark/Trading/mini_orderbook.png;content/bts_spark/Trading/oco_algo_control.png;content/bts_spark/Trading/offset_algo_control.png;content/bts_spark/Trading/pnl_calculation.png;content/bts_spark/Trading/pnl_window.png;content/bts_spark/Trading/recreate_icon.png;content/bts_spark/Trading/settings_icon.png;content/bts_spark/Trading/spark_menu_order_book.png;content/bts_spark/Trading/top_algo_control.png;content/bts_spark/Trading/trigger_algo_control.png;content/bts_spark/_index.md;content/release_notes/_index.md;content/system_requirements/_index.md;static/book.js;static/favicon.ico;static/image.js;templates/index.html;templates/page.html;templates/section.html;templates/shortcodes/back_button.html)
@@ -4,6 +4,171 @@ weight = 3
 sort_by = "weight"
 insert_anchor_links = "right"
 +++
+
+## 2.6.1
+### User Visible Changes
+  - Fixed an issue in the ladder where an error could occur when trying to change ladder settings for the first time
+  
+## 2.6.0
+### User Visible Changes
+  - In the ladder made last trade more distinctive when overlayed on the volumn column
+  - In the ladder, corrected display of volume tool tip 
+  - In the ladder, changed the consolidation of last trade to consider only the price ignoring aggressor changes
+  - Added an option for the Top Algo to delete itself if within N ticks from top of book
+  - Address a rare issue that could lead to an error report on UI exit
+  - Added margin risk limits
+  - Added the "Offset" algo. Offset prices a child algo at a parameterizable distance from the top of the book
+  - Avoided switching the current account and order type on open ladders when limits are changed 
+### Internal Changes
+  - Ensure that admin logins are always allowed to login, regardless of keycode status.
+  
+## 2.5.0
+### User Visible Changes
+  - Added loss limit risk check
+  - Made algos, synthetics and user names private so that multiple users can share a single system privately.
+  - Allowed the mini order book defaults for column widths to be changed from the mini order book
+  - Allowed the mini order book to shrink to the minimum size that will be needed to display the selected columns
+  - Improved accuracy of the directional arrow when displaying last trades in the volumn column
+## 2.4.0
+### User Visible Settings
+  - In the ladder, changed the last trade column to accumulate successive trades at the same price
+  - Fixed a bug in the order book where the right side ladder would display the top leve order's security rather then current row's
+  - Added OK, Cancel buttons to the security picker for ladder profiles or sounds
+  - Added ladder settings for the mini order book
+  - Added a safety check to guard against unintentional market crosses
+  - Improved the Queue Holder mode in the spreader:
+     - Added a Show Quantity, allowing the spreader to keep queue position of the trailing orders as Fills (of size Show Qty) happen
+     - Improved spreader performance when in Queue Holder mode
+### Internal changes
+  - Suppressed order callbacks for completed/canceled orders. This should eliminate some bogus error logs by spreader orders.
+  - Addressed a potential concurrency issues with service initialization.
+
+
+## 2.3.0
+### User Visible Changes
+  - Introduced multiple settings profiles for the ladder
+     - This allows multiple standard configuration for the ladder, optionally with security specific variations
+  - Made Cover order more independent from its hedging chidren:
+     - Cover continues to operate even if an hedging child is canceled
+	 - When a cover is canceled it will detach from any running hedging children, instead of canceling them
+  - Changed Lean, Join and Cover algos to hide themselves in the ladder once they have completed their work 
+  - Changed manual fills to appear in day PnL rather than in the SOD records
+  - Add buy/sell coloring to fill rows in fills window
+  - Streamlined the mini order book:
+    - Display of the mini order book popup is quicker
+    - Only exchange orders are displayed
+	- Update buttons are only displayed for orders that are under control of an algo with the update applying to the entire algo, not just the exchange order 
+    - We can now select multiple rows to attach, detach, update or cancel multiple orders in a batch
+    - A checkbox column has been added to make clearer which rows are selected
+### API Changes
+  - Enhanced the API to allow algos to implement custom cancel handling
+  - Allowed algos to control their visibility in the ladder through the API
+### Internal Changes
+  - Added system requirements to Spark documentation
+  - Implemented keycodes
+  - Temporarily rejected stop and stop limit orders, pending bug fixes
+  
+## 2.2.0
+### User Visible Changes
+  - Made our orders easier to spot in MBO display
+  - Changed middle-click on center column to recenter ladder and introduced Alt middle-click on center to bring up the MBO popup
+  - Fixed Net/Absolute radio button in risk admin UI
+  - Fixed double counting of spread legs in limits
+  - Removed expired fills from the system
+  - Improved handling of orders with undiscovered securities
+  - Added feedback to the ladder when the user attempts to middle click on bid/ask columns using an order that does not have parameters
+  - Fixed display of algo studio algo types in order book
+  - Hid net change setting in synthetic ladders 
+  - Fixed a number of problems with filtering on the Fills form
+  - On the Lean algo, OnToward and Away are now calculated with respect to the opposite inside market at time of the order launch
+  - Iceberg Spreaders with queue holders are not erroneously cancelled after the first fill
+  - Added security symbol column to fills window
+  - Re-organized ladder settings dialog to make it clearer and easier to use
+  
+## 2.1.4
+### User Visible Changes
+  - Fixed handling of cancel button in security picker
+  
+## 2.1.3
+### User Visible Changes
+  - Fixed a simulator bug in the handling of 0 sized orders 
+
+## 2.2.1
+### User Visible Changes
+  - Fixed order book form exception when display a spreader order for whichs the legs were not present yet
+  
+## 2.1.1
+### User Visible Changes
+  - Added PIQ to GLBX Iceberg orders
+  - Corrected handling of stop limit orders
+  
+## 2.1.0
+### User Visible Changes
+  - Added support for the GLBX Iceberg order type
+  - Allowed quick algo param edits by middle-clicking on either the bid/ask columns or a "favorite" button
+  - Added support for manual fills, either entered manually or imported from file. Manual fills are used only for P&L purposes, they have no impact on limits
+  - Allowed the LTQ and VAP values to be overlayed on the same ladder column
+  - Added day position information to the ladder
+  - Added PIQ to the mini order book
+  - Fixed a rare bug that could lead to server failure when requesting market data
+  - Fixed a bug that could cause incorrect price displays for certain types of synthetic securities
+ 
+## 2.0.5
+### User Visible Changes
+  - Fixed a bug in the handling of rejected QHO orders
+  - Implemented stricter position limit enforcement
+  - Fixed a bug that could cause server failure when trying to attach to already attached orders
+
+## 2.0.4
+### User Visible Changes
+  - Fixed performance regression in order manager
+  
+### Internal changes
+  - Improved market data diagnostics for bad configurations
+  - Changed market data default buffer size
+  
+## 2.0.3
+### Internal changes
+  - Improved backwards compatibility in UI settings
+
+  
+## 2.0.2
+### User Visible Changes
+  - Middle click the ladder price column to show the orders for that price level 
+  - Middle click the bid or ask column in the ladder no longer sends an order
+
+### Internal changes
+  - Improved market by order performance under heavy load
+  - Fixed a concurrency bug in SIM
+
+## 2.0.0
+### User Visible Changes
+  - Support for attaching and detaching algos to existing orders
+  - Support for display and update of all parameters in running algos
+  - Streamlining of order badge decorations in ladder
+  - New order search/filtering algorithm for order book
+  - Simpler representation of complex algo chains in order book and mini order book
+  - Visual and usability improvements to mini order book
+  - Streamlining of algo parameter dialog in ladder
+  - New spreader queue holder behavior
+  - Visual improvements to the order book
+  - New server side API
+  - Improved admin UI performance
+  - Optimized PIQ rendering
+### Internal changes
+  - Exchange simulator no longer requires daily sequence number reset
+  - Improved MD resilience to corrupted shared memory
+  - Native orders can now buffer updates/cancels when disconnected or pending first acknowledgment
+  - Improved settings manager tool output
+  - Added diagnostics in the event MD memory corruption is detected
+  - Added systems tests for join,lean, iceberg and spreader orders
+  - Made exchange order recovery more resilient in the presence of database loss 
+  
+## 1.6.2
+### User Visible Changes
+### Exchange simulator
+  - Exchange simulator now now produce position in queue data
+
 ## 1.6.0
 ### User Visible Changes
 #### New Features
@@ -253,6 +418,7 @@ insert_anchor_links = "right"
 - All windows now contain a settings page where grid settings (font color, size, etc) are applied
 - These settings can be saved on a per-window basis or as a Default for newly-launched windows

+
 ## 1.3.1 Through 1.3.4

 ### Speed Enhancements
@@ -0,0 +1,55 @@
+++
+title = "System Requirements"
+weight = 4
+sort_by = "weight"
+insert_anchor_links = "right"
+++
+
+
+### Minimum Workstation
+* New XPS Tower
+* 8th Generation Intel® Core™ i7-8700 6-Core Processor (12M Cache, up to 4.6 GHz)
+* 16GB, 2666MHz, DDR4 up to 64GB
+* Windows 10 Professional 64-bit
+* NVIDIA® GeForce® GTX 1070 with 8GB GDDR5 Graphics Memory
+* 1 x 2.5" 256GB SATA Solid State Drive
+
+### Recommended Workstation
+* Similar or better than:
+* Dell Precision Tower 5820
+* Intel Xeon W-2145 3.7GHz, 4.5GHz Turbo, 8C, 11M Cache, HT, (140W) DDR4-2666
+* Windows 10 Professional 64-bit
+* NVIDIA® Quadro® P1000, 4GB, 4 mDP
+* 16GB (4x4GB) 2133MHz DDR4 RDIMM ECC
+* 2 x 2.5" 256GB SATA Solid State Drive running RAID1
+
+
+### BTS Recommended Server Specifications
+* Dell R640
+* 2x Intel Xeon Gold 6148 2.40GHz 20-Core Processors. For better performance BTS recommends Intel® Xeon® Platinum 8268 2.9G, 24 Core CPU
+* 192GB RAM 2666MHz DDR4
+* 3x 480GB SSD RAID 5 HBA Minicard
+* iDRAC 9 Enterprise
+* Embedded Broadcom NIC
+* Solarflare SFN8522-R2
+* Redundant Power Supply
+
+### BTS Minimum Server Specifications
+* Dell R620
+* Chassis with up to 8, 2.5” Hard Drives, up to 2 PCIe Slots (With Optional Riser)
+* 2 x Intel® E5-2670 (16 total cores/ 32 total threads)
+* 64GB total memory
+* RAID 1 for H330/H730/H730P
+* PERC H730 RAID Controller, 1GB NV Cache
+* 3 x 300GB 10K RPM SATA 6Gbps 2.5in Hot-plug Hard Drive (RAID 5)
+* iDRAC8 Enterprise, integrated Dell Remote Access Controller, Enterprise (varies by hosting company)
+* Solarflare Ultra SFN7122F Dual-Port 10GbE (10 GB connectivity requirements, copper vs optical, varies by hosting company).
+* Dual, Hot-plug, Redundant Power Supply (1+1), 750W
+* Performance BIOS Setting
+* ReadyRails Sliding Rails Without Cable Management Arm (varies by hosting company)
+
+### Edge Tablet Requirements
+* Similar or better than:
+* Microsoft Surface Pro 4 Or Motion R12
+* Intel i7
+* 8 GB DDR4 RAM
@@ -1,7 +1,6 @@
 #/bin/bash
 #python -m mkdocs build -d site

-cp -r ../../src/sdk/doc/* ./content/bts_spark_sdk/Server/
 ./run_zola.sh build

 scp -r ./public bts@bluetradesys.com:/home/bts/doc/
@@ -14,7 +13,3 @@ sudo mv ./public/* /var/www/documentation/
 EOF

 rm -r public
-cd ./content/bts_spark_sdk/server/
-find  . -not -name '_index.md' -delete
-cd ../..
-
@@ -7,12 +7,12 @@ using System.Linq;
 using System.Reactive.Linq;
 using System.Reactive.Subjects;
 using bts.api.core;
+using mbts.ui.shell;

 namespace mbts.spark {
   [Export]
   class AdminModel : IDisposable {
-      readonly string _user_name;
-      public string user_name => _user_name;
+      public readonly UserTuple user;
      
      readonly BehaviorSubject<IReadOnlyDictionary<uint, string>>
         _accounts_subject = new BehaviorSubject<IReadOnlyDictionary<uint, string>>(new Dictionary<uint, string>()),
@@ -24,14 +24,14 @@ namespace mbts.spark {
      IDisposable _dispose;      

      [ImportingConstructor]
-      AdminModel(AdminService service, [Import("username")]string user_name) {
-         _user_name = user_name;
+      AdminModel(AdminService service, [Import]UserTuple user) {
+         this.user = user;
         _dispose = service.subscribei_admin_data().Select(update => {
-            _wrapper_subject.OnNext(new AdminModelWrapper(update.all.TryFirst(), _user_name));
+            _wrapper_subject.OnNext(new AdminModelWrapper(update.all.TryFirst(), user.name));
            IEnumerable<BTSUserImmutable> active_users =
               from admin_data in update.all
               from bts_user in admin_data.Users
-               where bts_user.Name == user_name && bts_user.HasUserData && bts_user.UserData.HasAccountPermissions
+               where bts_user.Name == user.name && bts_user.HasUserData && bts_user.UserData.HasAccountPermissions
               select bts_user;

            IEnumerable<BTSAccountImmutable> active_accounts =
@@ -62,14 +62,6 @@ namespace mbts.spark {
      public IObservable<IReadOnlyList<AccountTuple>> on_account_tuples => on_accounts.Select(d => d.Select(kv => new AccountTuple(kv.Key, kv.Value)).ToList());
      public IObservable<AdminModelWrapper> on_admin_data => _wrapper_subject.AsObservable();

-      public UserTuple? get_current_user() {
-         foreach (var kv in _user_map) {
-            // just for good measure, there should never be > 1 element in _user_map, and it should always match _user_name
-            if (kv.Value == _user_name)
-               return new UserTuple(kv.Key, kv.Value);
-         }
-         return null;
-      }
      public AccountTuple? get_default_account() {
         foreach (var kv in _account_map) {
            return new AccountTuple(kv.Key, kv.Value);
@@ -3,6 +3,7 @@ using mbts;
 using mbts.config;
 using mbts.spark;
 using mbts.ui;
+using mbts.ui.shell;
 using System;
 using System.Collections.Generic;
 using System.ComponentModel.Composition;
@@ -22,7 +23,7 @@ namespace bts.ui {
      IDisposable _dispose;

      [ImportingConstructor]
-      public AboutDaemon(IBus bus, [Import("username")]string username) {
+      public AboutDaemon(IBus bus, [Import(LoginContainer.Exports.UserName)]string username) {
         _user = username;
         _bus = bus;
         _dispose = bus.subscribe(SparkTags.About).OnDispatcher().Subscribe(_ => show_about());
@@ -10,6 +10,7 @@ using System.Reactive.Linq;
 using System.Windows.Threading;
 using System.Windows;
 using System.Threading.Tasks;
+using mbts.ui.shell;

 namespace bts.spark
 {
@@ -20,7 +21,7 @@ namespace bts.spark
      IDisposable _dispose;

      [ImportingConstructor]
-      public ErrorReporter(ErrorReportService svc, IBus bus, [Import("username")] string username) {
+      public ErrorReporter(ErrorReportService svc, IBus bus, [Import(LoginContainer.Exports.UserName)] string username) {
         _svc = svc;
         _username = username;
         _dispose = bus.subscribe(SparkTags.Support).OnDispatcher().Subscribe(msg => show_support_window(msg, "Report a problem"));
@@ -82,7 +83,6 @@ namespace bts.spark
         }
      }

-      //public static async Task<Result<T>>
      public static async Task<(T value, bool success)> safe_execute<T>(this ErrorReporter error_reporter, Func<Task<Result<T>>> execute, Func<T, bool> get_success, Func<T, string> get_error_msg, string desc) {
         try {
            var result = await execute();
@@ -101,5 +101,31 @@ namespace bts.spark
         void _report_error(string msg) =>
            error_reporter.report_error($"Error {desc}: {msg}", AlgoStudioWindow.NAME, MessageBoxImage.Warning);
      }
+
+      public static async Task<TResult> safe_execute<T, TResult>(
+         this ErrorReporter error_reporter,
+         Func<Task<Result<T>>> execute,
+         Func<T, bool> get_success,
+         Func<T, string> get_error_msg,
+         Func<T, bool, TResult> result_selector,
+         string desc) {
+         //
+         try {
+            var result = await execute();
+            if (!result.success) {
+               _report_error(result.error_message);
+            } else if (!get_success(result.value)) {
+               _report_error(get_error_msg(result.value));
+            } else {
+               return result_selector(result.value, true);
+            }
+         } catch (Exception ex) {
+            _report_error(ex.ToString());
+         }
+         return result_selector(default, false);
+         //
+         void _report_error(string msg) =>
+            error_reporter.report_error($"Error {desc}: {msg}", AlgoStudioWindow.NAME, MessageBoxImage.Warning);
+      }
   }
 }
@@ -15,6 +15,7 @@ using System.Collections.Concurrent;
 using System.Threading;
 using bts.api.user;
 using bts.md;
+using mbts.ui.shell;

 namespace bts {
   [Export(typeof(IInitializable))]
@@ -27,8 +28,8 @@ namespace bts {
      static uint get_naggle() => mbts.config.Configuration.get<md.RelayOptions>().naggle_ms;

      [ImportingConstructor]
-      public MDDaemon(Lazy<IBus> bus, Lazy<AuthTokenImmutable> token, Lazy<SyntheticSecurityService> ss) : 
-         base(get_naggle(), MDSourceOptions.DeferInit) {
+      public MDDaemon(Lazy<IBus> bus, Lazy<AuthTokenImmutable> token, Lazy<SyntheticSecurityService> ss, [Import(LoginContainer.Exports.UserID)]uint user_id) : 
+         base(get_naggle(), MDSourceOptions.DeferInit, user_id) {
         _bus = bus;
         _token = token;
         _ss = ss;         
@@ -11,6 +11,7 @@ using System.Collections.Generic;
 using System.ComponentModel.Composition;
 using System.Reactive.Linq;
 using System.Windows;
+using LadderSettings = mbts.spark.LadderSettings;

 namespace bts.shell {
   [Export(typeof(IShellDaemon))]
@@ -48,14 +49,14 @@ namespace bts.shell {
      void _show_order_ticket(SecurityMD smd) =>
         _show_order_window(new OrderTicket {
            DataContext = new NewOrderTicketVM(_model, smd,
-               Observable.Return(_model.factory.default_ladder_settings(smd.security)))
+               Observable.Return(LadderSettings.Default))
         });

      void _show_order_ticket((OrderDefinitionImmutable def, double price, uint size) ops) {
         if (_md_map.TryGetValue(ops.def.SecurityKey, out SecurityMD smd))
            _show_order_window(new OrderTicket {
               DataContext = new NewOrderTicketVM(_model, smd, ops.def, ops.price, ops.size,
-                  Observable.Return(_model.factory.default_ladder_settings(smd.security).calculator_buttons))
+                  Observable.Return(LadderSettings.Default.calculator_buttons))
            });
      }

@@ -66,7 +67,7 @@ namespace bts.shell {
            _show_order_window(new OrderModificationDialog {
               DataContext = new ExistingOrderTicketVM(_model,
                  Observable.Return((md,ori.order)),
-                  Observable.Return(_model.factory.default_ladder_settings(ori.sec.Value).calculator_buttons)
+                  Observable.Return(LadderSettings.Default.calculator_buttons)
               )
            });
         }
@@ -69,10 +69,11 @@ namespace bts {
         cpv.Width = double.NaN;
         cpv.Height = double.NaN;

-         vm.ok_action = () => {
+         vm.ok_action += () => {
            window.Close();
            message.complete(select_result(vm)).execute(_bus);
         };
+         vm.cancel_action += () => window.Close();
         window.move_to_mouse();
         window.Show();
      }
@@ -3,6 +3,7 @@ using bts.metrics;
 using mbts;
 using mbts.config;
 using mbts.ui;
+using mbts.ui.shell;
 using System;
 using System.Collections.Generic;
 using System.ComponentModel.Composition;
@@ -23,7 +24,7 @@ namespace bts.perf {
      Ping _pinger = new Ping();

      [ImportingConstructor]
-      public ShellLatencyDaemon(ShellLatencyService service, [Import("username")] string user) {
+      public ShellLatencyDaemon(ShellLatencyService service, [Import(LoginContainer.Exports.UserName)] string user) {
         _service = service;
         _version = Configuration.get<bts.config.System>().version;
         _username = user;
@@ -22,12 +22,15 @@ namespace mbts.ui {
         AddBoxesGeometryKey = nameof(AddBoxesGeometryKey),
         AddFileGeometryKey = nameof(AddFileGeometryKey),
         AddFileThinGeometryKey = nameof(AddFileThinGeometryKey),
-         AttachAlgosGeometryKey = nameof(AttachAlgosGeometryKey),
+         AttachAlgosKey = nameof(AttachAlgosKey),
         CheckMarkGeometryKey = nameof(CheckMarkGeometryKey),
-         DetachAlgosGeometryKey = nameof(DetachAlgosGeometryKey),
+         CopyWFGeometryKey = nameof(CopyWFGeometryKey),
+         DataEditGeometryKey = nameof(DataEditGeometryKey),
+         DetachAlgosKey = nameof(DetachAlgosKey),
         DiskGeometryKey = nameof(DiskGeometryKey),
         DiskFileGeometryKey = nameof(DiskFileGeometryKey),
         DocumentGeometryKey = nameof(DocumentGeometryKey),
+         DocumentAddGeometryKey = nameof(DocumentAddGeometryKey),
         DocumentBrokenGeometryKey = nameof(DocumentBrokenGeometryKey),
         DocumentCopyGeometryKey = nameof(DocumentCopyGeometryKey),
         DocumentEmptyGeometryKey = nameof(DocumentEmptyGeometryKey),
@@ -37,11 +40,14 @@ namespace mbts.ui {
         EditDocumentAltGeometryKey = nameof(EditDocumentAltGeometryKey),
         EditDocumentGeometryKey = nameof(EditDocumentGeometryKey),
         GearGeometryKey = nameof(GearGeometryKey),
+         LetterAKey = nameof(LetterAKey),
+         LetterDKey = nameof(LetterDKey),
         OrdersGeometryKey = nameof(OrdersGeometryKey),
         PaymentGeometryKey = nameof(PaymentGeometryKey),
         PencilGeometryKey = nameof(PencilGeometryKey),
         PlayGeometryKey = nameof(PlayGeometryKey),
         ProhibitedGeometryKey = nameof(ProhibitedGeometryKey),
+         RubberStampGeometryKey = nameof(RubberStampGeometryKey),
         StarGeometryKey = nameof(StarGeometryKey),
         ToolsGeometryKey = nameof(ToolsGeometryKey),
         TrashGeometryKey = nameof(TrashGeometryKey),
@@ -118,7 +124,7 @@ namespace mbts.ui {
      public static ImageSource AddBoxes => create_icon(AddBoxesGeometryKey);
      public static ImageSource AddEncircled { get { return load_resource_and_freeze("AddEncircled"); } }
      public static ImageSource AddFile => create_icon(Smashicons.AddFileGeometryKey);
-      public static ImageSource AttachAlgos => create_icon(AttachAlgosGeometryKey);
+      public static ImageSource AttachAlgos => create_icon(AttachAlgosKey);
      public static ImageSource Beaker { get { return load_resource_and_freeze("Beaker"); } }
      public static ImageSource Book { get { return load_resource_and_freeze("Book"); } }

@@ -142,11 +148,14 @@ namespace mbts.ui {
      public static ImageSource ModifyOrder { get { return load_resource_and_freeze("ModifyOrder"); } }
      public static ImageSource CheckMark => create_icon(CheckMarkGeometryKey);
      public static ImageSource Clock { get { return load_resource_and_freeze("Clock"); } }
+      public static ImageSource CopyWF => create_icon(CopyWFGeometryKey);
+      public static ImageSource DataEdit => create_icon(DataEditGeometryKey, Brushes.White, new Pen(Brushes.Black, 1).frozen());
      public static ImageSource Defrag { get { return load_resource_and_freeze("Defrag"); } }
-      public static ImageSource DetachAlgos => create_icon(DetachAlgosGeometryKey);
+      public static ImageSource DetachAlgos => create_icon_and_rotate(DetachAlgosKey, Brushes.Red);
      public static ImageSource Disk => create_icon(DiskGeometryKey);
      public static ImageSource DiskFile => create_icon(DiskFileGeometryKey);
      public static ImageSource Display { get { return load_resource_and_freeze("Display"); } }
+      public static ImageSource DocumentAdd => create_icon(DocumentAddGeometryKey);
      public static ImageSource DocumentBroken => create_icon(DocumentBrokenGeometryKey);
      public static ImageSource DocumentCopy => create_icon(DocumentCopyGeometryKey);
      public static ImageSource DocumentEmpty => create_icon(DocumentEmptyGeometryKey);
@@ -164,6 +173,7 @@ namespace mbts.ui {
      public static ImageSource Payment => create_icon(PaymentGeometryKey);
      public static ImageSource Pencil => create_icon(PencilGeometryKey);
      public static ImageSource Prohibited => create_icon(ProhibitedGeometryKey);
+      public static ImageSource RubberStamp => create_icon(RubberStampGeometryKey);
      public static ImageSource RedoCircular => create_icon(UndoCircularGeometryKey, Brushes.Black, null, new ScaleTransform(-1, 1));
      public static ImageSource Spawn { get { return load_resource_and_freeze("Spawn"); } }
      public static ImageSource Star => create_icon(StarGeometryKey);
@@ -192,6 +202,19 @@ namespace mbts.ui {
         return rv;
      }

+      public static ImageSource create_icon_and_rotate(string geometric_path_key, Brush brush = null, Pen pen = null, Transform transform = null, double degrees = 90) {
+         if (brush == null) {
+            brush = Brushes.Black;
+         }
+         var drawing = create_drawing(geometric_path_key, brush, pen, transform);
+         var dg = new DrawingGroup();
+         dg.Children.Add(drawing);
+         dg.Transform = new RotateTransform(degrees);
+         var rv = new DrawingImage(dg);
+         rv.Freeze();
+         return rv;
+      }
+
      public static Drawing create_drawing(string geometric_path_key) =>
         create_drawing(geometric_path_key, Brushes.Black);

@@ -5,6 +5,14 @@
  xmlns:mbts="clr-namespace:mbts.ui"
  xmlns:sys="clr-namespace:System;assembly=mscorlib"
 >
+
+  <sys:String x:Key="{x:Static mbts:Icons.AttachAlgosKey}">
+    M10.519881,14.945064C11.300896,14.955074,12.079896,15.102078,12.819896,15.386075L10.878893,17.326085C9.6458764,17.201085,8.3688531,17.591071,7.4258485,18.533091L3.5977991,22.360102C1.9327704,24.026093 1.9317786,26.736124 3.5977991,28.402117 5.2638197,30.068108 7.9748359,30.068108 9.6398644,28.402117L13.467914,24.575106C14.410919,23.632109,14.800938,22.355097,14.675937,21.121083L16.615963,19.180096C17.523962,21.546103,17.034943,24.325104,15.126931,26.234108L11.298882,30.061119C8.7138591,32.64612 4.5238051,32.64612 1.9387672,30.062127 -0.64625573,27.477126 -0.64625573,23.287106 1.9387672,20.701098L5.7668166,16.875065C7.077837,15.564055,8.8018727,14.923061,10.519881,14.945064z M19.825993,10.418039L21.580012,12.17305 12.089907,21.665091 10.333873,19.911087z M25.383069,0C27.077088,3.0538786E-08 28.771109,0.64599859 30.063117,1.9390028 32.647133,4.5230274 32.647133,8.7120385 30.062109,11.298047L26.235068,15.125058C24.327055,17.033085,21.547022,17.52207,19.181973,16.614077L21.121998,14.674067C22.356022,14.799068,23.633046,14.409051,24.57605,13.466054L28.403094,9.6400513C30.068121,7.9740295 30.069129,5.2630205 28.403094,3.5980362 26.738064,1.9320143 24.027033,1.9320143 22.362034,3.5980362L18.533986,7.4240398C17.591958,8.3670363,17.201968,9.643042,17.32697,10.877056L15.385937,12.817066C14.478913,10.452035,14.968939,7.6730337,16.875945,5.7660436L20.703019,1.9390028C21.995026,0.64599859,23.689047,3.0538786E-08,25.383069,0z
+  </sys:String>
+  <sys:String x:Key="{x:Static mbts:Icons.DetachAlgosKey}">
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@@ -334,6 +301,10 @@
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  <!--File (the icon is free to use if we include this information in our credit section)
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@@ -5,6 +5,7 @@ using mbts.co2;
 using mbts.persist;
 using mbts.spark;
 using mbts.ui;
+using mbts.ui.shell;
 using System.Collections.Generic;
 using System.ComponentModel.Composition;
 using System.IO;
@@ -18,7 +19,7 @@ namespace bts.shell
   class MarketShellModule : IShellModule
   {
      [ImportingConstructor]
-      public MarketShellModule(IBus bus, MDConsumer consumer, UserSettingsHub settings_hub, OrdersModel orders_model, [Import("username")]string user_name) {
+      public MarketShellModule(IBus bus, MDConsumer consumer, UserSettingsHub settings_hub, OrdersModel orders_model, [Import(LoginContainer.Exports.UserName)]string user_name) {
         _tsf = new TimeAndSalesWindowFactory(this, bus, consumer, settings_hub);
         _mvf = new MarketViewWindowFactory(this, bus, settings_hub, orders_model);
      }
@@ -204,13 +204,15 @@ namespace mbts.spark {
            }
         }

-         void _show_order_book(Side side) =>
-            _bus.post(SparkTags.ShowOrderBookTag, new bts.shell.orderbook.OrderBookStartupData(
-               new bts.shell.orderbook.FilterStates {
-                  statuses = new[] { OrderStatus.Working },
-                  sides = new[] { side },
-                  security_criteria = new SecurityCriteria(security)
-               }));
+         void _show_order_book(Side side) {
+            var ob_settings = bts.shell.orderbook.OrderBookStartupData.Default;
+            ob_settings.filters = new bts.shell.orderbook.FilterStates {
+               statuses = new[] { OrderStatus.Working },
+               sides = new[] { side },
+               security_criteria = new SecurityCriteria(security)
+            };
+            _bus.post(SparkTags.ShowOrderBookTag, ob_settings);
+         }

         void _show_order_ticket(MarketViewView.Columns col) {
            var order = _orders_model.factory.order(security);
@@ -1,5 +1,6 @@
 using bts.api;
 using bts.collections;
+using bts.utils;
 using mbts.persist;
 using mbts.spark.filters;
 using mbts.ui;
@@ -22,13 +23,12 @@ namespace mbts.spark {
      readonly OrdersModel _orders_model;
      IWindowSettingsManager<GridSettings> _settings_manager;

-
      public MarketViewVM(IBus bus, OrdersModel orders_model, IObservable<StartupData> state, IWindowSettingsManager<GridSettings> settings_manager )
         : this(bus, orders_model, state, state.SelectManyInSeries(s => s.security_criteria.subscribe_md(bus)), settings_manager) { }

      // securities_connectable should NOT be connected already.
-      MarketViewVM(IBus bus, OrdersModel orders_model, IObservable<StartupData> state, IConnectableObservable<IEnumerable<SecurityMD>> securities_connectable, IWindowSettingsManager<GridSettings> settings_manager)
-         : base(RXCollection.Create(securities_connectable, SecurityDataHelper.EqualityComparer.MDComparer), null) {
+      MarketViewVM(IBus bus, OrdersModel orders_model, IObservable<StartupData> state, IObservable<IEnumerable<SecurityMD>> securities_source, IWindowSettingsManager<GridSettings> settings_manager)
+         : base(RXCollection.Create(securities_source, SecurityDataHelper.EqualityComparer.MDComparer), null) {
         _bus = bus;
         _orders_model = orders_model;
         security_filter = new RegexFilterVM<Row>(r => r.security.ToString(), nameof(Row.security));
@@ -58,12 +58,12 @@ namespace mbts.spark {
         add_col(Columns.SessionHigh, "High", r => r.format_price(r.session_high), nameof(Row.session_high), DefaultColumnWidths.Price, session_high_filter, DataGridFilterKnownTemplates.DoubleMinMax, h_alignment: System.Windows.HorizontalAlignment.Right);
         add_col(Columns.SecurityKey, "Security Key", r => r.security_key.ToString(), nameof(Row.security_key), DefaultColumnWidths.SecurityKey, security_key_filter, DataGridFilterKnownTemplates.Regex);

-         add_col(Columns.MarketDescription, "Market Description", r => r.md.security.HasIce ? r.md.security.Ice.MarketDescription : string.Empty, nameof(Row.market_description), DefaultColumnWidths.SecurityKey, market_description_filter, DataGridFilterKnownTemplates.Regex);
-         add_col(Columns.ClearedAlias, "Cleared Alias", r => r.md.security.HasIce ? r.md.security.Ice.ClearedAlias : string.Empty, nameof(Row.cleared_alias), DefaultColumnWidths.SecurityKey, cleared_alias_filter, DataGridFilterKnownTemplates.Regex);
-         add_col(Columns.ProductDescription, "Product Description", r => r.md.security.HasIce ? r.md.security.Ice.ProductName : string.Empty, nameof(Row.product_description), DefaultColumnWidths.SecurityKey, product_description_filter, DataGridFilterKnownTemplates.Regex);
-         add_col(Columns.HubAlias, "Hub Alias", r => r.md.security.HasIce ? r.md.security.Ice.HubAlias : string.Empty, nameof(Row.hub_alias), DefaultColumnWidths.SecurityKey, hub_alias_filter, DataGridFilterKnownTemplates.Regex);
-         add_col(Columns.StripName, "Strip Name", r => r.md.security.HasIce ? r.md.security.Ice.StripName : string.Empty, nameof(Row.strip_name), DefaultColumnWidths.SecurityKey, strip_name_filter, DataGridFilterKnownTemplates.Regex);
-         add_col(Columns.MicCode, "Mic Code", r => r.md.security.HasIce ? r.md.security.Ice.MicCode : string.Empty, nameof(Row.mic_code), DefaultColumnWidths.SecurityKey, mic_code_filter, DataGridFilterKnownTemplates.Regex);
+         add_col(Columns.MarketDescription, "Market Description", r => r.security.market_description(), nameof(Row.market_description), DefaultColumnWidths.SecurityKey, market_description_filter, DataGridFilterKnownTemplates.Regex);
+         add_col(Columns.ClearedAlias, "Cleared Alias", r => r.security.cleared_alias(), nameof(Row.cleared_alias), DefaultColumnWidths.SecurityKey, cleared_alias_filter, DataGridFilterKnownTemplates.Regex);
+         add_col(Columns.ProductDescription, "Product Description", r => r.security.product_name(), nameof(Row.product_description), DefaultColumnWidths.SecurityKey, product_description_filter, DataGridFilterKnownTemplates.Regex);
+         add_col(Columns.HubAlias, "Hub Alias", r => r.security.hub_alias(), nameof(Row.hub_alias), DefaultColumnWidths.SecurityKey, hub_alias_filter, DataGridFilterKnownTemplates.Regex);
+         add_col(Columns.StripName, "Strip Name", r => r.security.strip_name(), nameof(Row.strip_name), DefaultColumnWidths.SecurityKey, strip_name_filter, DataGridFilterKnownTemplates.Regex);
+         add_col(Columns.MicCode, "Mic Code", r => r.security.mic_code(), nameof(Row.mic_code), DefaultColumnWidths.SecurityKey, mic_code_filter, DataGridFilterKnownTemplates.Regex);
         //
         void add_col(Columns col_key, string header, Func<Row, string> get_text, string prop, double width, IDataGridColumnFilter filter, string filter_template, bool is_animatable = false, Color? font_color = null, System.Windows.HorizontalAlignment h_alignment = System.Windows.HorizontalAlignment.Left) =>
            columns.Add(new RenderTextColumn<Row, Columns>(col_key, get_text, filter, filter_template) {
@@ -163,7 +163,6 @@ namespace mbts.spark {
            ask_price_filter, ask_merged_size_filter, ask_direct_size_filter, ask_implied_size_filter,
            last_price_filter, last_size_filter, day_change_filter, settlement_filter,
            session_low_filter, session_high_filter, position_filter, working_bid_volume_filter, working_ask_volume_filter, volume_filter, security_key_filter),
-            securities_connectable.Connect(),
            settings_manager.subscribe_current().OnDispatcher().Subscribe(grid_settings_manager),
            WorkLoop.Start("MarketView", _refresh)
         );
@@ -180,6 +179,40 @@ namespace mbts.spark {
            return grid_settings_manager.create();
      }

+      public static IComparer<Row> get_column_comparer(Columns column) {
+         switch (column) {
+            case Columns.Security: return wrap(r => r.security);
+            case Columns.SecurityKey: return wrap(r => r.security.Id);
+            case Columns.Volume: return wrap(r => r.volume);
+            case Columns.Last: return wrap(r => r.last_price);
+            case Columns.LastSize: return wrap(r => r.last_size);
+            case Columns.Position: return wrap(r => r.position);
+            case Columns.WorkingBids: return wrap(r => r.working_bid_volume);
+            case Columns.BidImpliedSize: return wrap(r => r.bid_implied_size);
+            case Columns.BidDirectSize: return wrap(r => r.bid_direct_size);
+            case Columns.BidMergedSize: return wrap(r => r.bid_merged_size);
+            case Columns.Bid: return wrap(r => r.bid_price);
+            case Columns.Ask: return wrap(r => r.ask_price);
+            case Columns.AskMergedSize: return wrap(r => r.ask_merged_size);
+            case Columns.AskDirectSize: return wrap(r => r.ask_direct_size);
+            case Columns.AskImpliedSize: return wrap(r => r.ask_implied_size);
+            case Columns.WorkingAsks: return wrap(r => r.working_ask_volume);
+            case Columns.Settlement: return wrap(r => r.settlement);
+            case Columns.DayChange: return wrap(r => r.day_change);
+            case Columns.SessionLow: return wrap(r => r.session_low);
+            case Columns.SessionHigh: return wrap(r => r.session_high);
+            case Columns.MarketDescription: return wrap(r => r.market_description);
+            case Columns.ClearedAlias: return wrap(r => r.security.cleared_alias());
+            case Columns.ProductDescription: return wrap(r => r.security.product_name());
+            case Columns.HubAlias: return wrap(r => r.security.hub_alias());
+            case Columns.StripName: return wrap(r => r.security.strip_name());
+            case Columns.MicCode: return wrap(r => r.security.mic_code());
+            default: return null;
+         }
+         IComparer<Row> wrap<T>(Func<Row, T> selector) =>
+            Comparer<T>.Default.wrap(selector);
+      }
+
      #region Filters
      public IDataGridColumnPersistentFilter<Row, string> security_filter { get; }
      public IDataGridColumnPersistentFilter<Row, DoubleMinMaxState> bid_price_filter { get; } = new DoubleMinMax<Row>(r => r.bid_price, nameof(Row.bid_price));
@@ -1,21 +1,25 @@
 using bts;
 using bts.api;
 using bts.shell;
+using bts.shell.fills;
 using bts.spark;
+using bts.utils;
 using mbts.persist;
 using mbts.ui;
 using mbts.ui.settings;
+using mbts.ui.shell;
 using mbts.ui.spark;
 using mbts.ui.utility;
 using mbts.utils;
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Reactive.Disposables;
 using System.Reactive.Linq;
 using System.Windows;

 namespace mbts.spark {
-   class MarketViewWindow : SparkWindow<MarketViewWindowFactory.StartupData>, ISharedWindow {
+   class MarketViewWindow : SparkWindow<MarketViewWindowFactory.StartupData>, ISharedWindow, ISlowMeasureContentSize {
      const string _window_type = "MarketView", _window_type_display_name = "Market View";
      readonly OrdersModel _orders_model;
      readonly AllowOnce _init_guard = new AllowOnce("MarketView");
@@ -25,6 +29,9 @@ namespace mbts.spark {
      MarketViewWindowFactory.StartupData _state;
      IReadOnlyList<SparkCommand> _commands;
      IDisposable _subscriptions;
+      SecurityCriteria
+         _selected_security_criteria_backing,
+         _sorted_selected_security_criteria_backing;

      public MarketViewWindow(MarketViewWindowFactory factory, IBus bus, OrdersModel orders_model, MarketViewWindowFactory.StartupData state, WindowSettingsManager<GridSettings> settings_manager)
         : base("Market View", bus, factory, SparkCommands.ShowMarketView.icon) {
@@ -50,45 +57,132 @@ namespace mbts.spark {

      public string thread_id { get; }

+      SecurityCriteria _selected_security_criteria {
+         get {
+            if (_selected_security_criteria_backing == null) {
+               if (_sorted_selected_security_criteria_backing != null) {
+                  _selected_security_criteria_backing = _sorted_selected_security_criteria_backing;
+               } else if (_vm != null)
+                  _selected_security_criteria_backing = new SecurityCriteria(_vm.selected_rows.Select(r => r.security));
+            }
+            return _selected_security_criteria_backing;
+         }
+      }
+      SecurityCriteria _sorted_selected_security_criteria {
+         get {
+            if (_sorted_selected_security_criteria_backing == null) {
+               if (_vm != null) {
+                  var sorting_criteria = _vm.rows_view.get_sorting_criteria(_vm.columns);
+                  var comp_builder = new ComparerBuilder<MarketViewVM.Row>();
+                  foreach (var sc in sorting_criteria) {
+                     if (_vm.columns.TryGetFirst(col => string.Equals(col.id, sc.col_name, StringComparison.CurrentCultureIgnoreCase), out var match)) {
+                        if (match is ui.controls.DIYGrid.IKeyedColumn<MarketViewView.Columns> kcol) {
+                           var col_comp = MarketViewVM.get_column_comparer(kcol.key);
+                           if (col_comp != null) {
+                              comp_builder.add(sc.is_ascending ? col_comp : col_comp.reverse());
+                           } else {
+                              Log.Ui.warn($"{_window_type} is unable to find the row comparer for the '{sc.col_name}' column.");
+                           }
+                        } else {
+                           Log.Ui.warn($"{_window_type} is unable find a column with id '{sc.col_name}.'");
+                        }
+                     }
+                  }
+                  var comp = comp_builder.to_comparer();
+                  _sorted_selected_security_criteria_backing = new SecurityCriteria(_vm.selected_rows.Ordered(comp).Select(r => r.security));
+               }
+            }
+            return _sorted_selected_security_criteria_backing;
+         }
+      }
+
+      bool _has_selected_rows() => _vm != null && _vm.selected_rows.Count > 0;
+
      public void thread_init() {
         _init_guard.check_access();
         Log.notnull(_state);
         var state_src = Observable.FromEvent<Action<MarketViewWindowFactory.StartupData>, MarketViewWindowFactory.StartupData>(cb => _state_changed += cb, cb => _state_changed -= cb).StartWith(_state);
         _vm = new MarketViewVM(_bus, _orders_model, state_src, _settings_manager);
         _view = new MarketViewView { DataContext = _vm };
+         _view._grid.Sorting += on_grid_sorting;
+         /// The 'CanExecute' plumbing for the cmds below is designed to avoid potentially costly .ToList() operations on the selected_rows/securities.
+         /// Some of the cmds post ITags with data that is, or has, a SecurityCriteria member; the SecurityCriteria constructor creates a new List of the specified securities.
+         /// For these commands, the objective is to evaluate 'CanExecute' without instantiating the SecurityCriteria (or more importantly, without creating a new List).
+         // show time and sales
+         var show_tas_cmd = new DelegateCommand(() => {
+            var sc = _selected_security_criteria;
+            if (sc.is_defined())
+               _bus.post(SparkTags.ShowTimeAndSalesTag, sc);
+         }, _has_selected_rows);
+         var show_tas_actual_cmd = SparkCommands.ShowTimeAndSales;
+         var show_tas_cmd_wrapper = new SparkCommandCommand(show_tas_actual_cmd.title, show_tas_actual_cmd.icon, show_tas_cmd);
+         // show fills
+         var show_fills_cmd = new DelegateCommand(() => {
+            var sc = _selected_security_criteria;
+            _bus.post(SparkTags.ShowFillsTag, new FillsSettings(
+               new FillsFilterStates {
+                  security = sc.is_defined() ? sc : _state.security_criteria
+               }));
+         });
+         var show_fills_actual_cmd = SparkCommands.ShowFills();
+         var show_fills_cmd_wrapper = new SparkCommandCommand(show_fills_actual_cmd.title, show_fills_actual_cmd.icon, show_fills_cmd, SparkCommands.KeyGestures.ShowFills);
+         // show synthetic create
+         var show_synth_create_cmd = new DelegateCommand(() => {
+            var sc = _sorted_selected_security_criteria;
+            if (sc.is_defined())
+               _bus.post(SparkTags.ShowSyntheticCreateTag, sc);
+         }, () => _vm.selected_rows.Count > 0 && _vm.selected_rows.Count <= 24);
+         var show_synth_create_actual_cmd = SparkCommands.ShowSyntheticCreate();
+         var show_synth_create_cmd_wrapper = new SparkCommandCommand(show_synth_create_actual_cmd.title, show_synth_create_actual_cmd.icon, show_synth_create_cmd, SparkCommands.KeyGestures.ShowSyntheticCreate);
+
         var update_securities_cmd = SparkCommands.change_securities_callback(_window_type_display_name);
+         // commands
         _commands = new List<SparkCommand> {
            SparkCommands.ShowLadders(SparkCommands.KeyGestures.ShowLadder).complete(_vm.selected_security_mds_observable(), smds => smds.Count > 0),
            SparkCommands.ShowOrderTicketFromSecurity(SparkCommands.KeyGestures.ShowOrderTicket).complete(_vm.current_security_md, md => md.HasValue, ConvertUtils.ValueOrDefault),
-            SparkCommands.ShowFills(SparkCommands.KeyGestures.ShowFills).complete(_vm.selected_securities_observable(), _ => true,
-               secs => new FillsWindowFactory.StartupData(new FillsWindowFactory.FilterStates {
-                  security = secs.Count > 0 ? new SecurityCriteria(secs) : _state.security_criteria
-               })
-            ),
-            SparkCommands.ShowTimeAndSales.complete(_vm.selected_securities_observable(), _ => true, secs => secs.Count > 0 ? new SecurityCriteria(secs) : _state.security_criteria),
-            SparkCommands.ShowSyntheticCreate(SparkCommands.KeyGestures.ShowSyntheticCreate).complete(_vm.sorted_selected_securities_observable(), secs => secs.Count > 0 && secs.Count <= 24, secs => new SecurityCriteria(secs)),
+            show_fills_cmd_wrapper,
+            show_tas_cmd_wrapper,
+            show_synth_create_cmd_wrapper,
            SparkCommands.change_securities_command(() => (update_securities_cmd, _state.security_criteria)),
            // wrap the grid settings view factory in a dialogCommand here since the vm is destroyed/recreated when the security criteria changes
            SparkCommands.window_settings_command(new DialogCommand(() => {
-               var vm = new WindowSettingsDialogVM<GridSettings, SimpleGridSettingsVM>(
+               var vm = new ShellSettingsDialogVM<GridSettings, SimpleGridSettingsVM>(
                  _settings_manager,
                  us => us.market_view_grid,
                  UserSettings.FileExtensions.GRID,
                  s => _vm.grid_settings_manager.create_vm(
                     // we need to get the most up to date GridSettings when launching b/c users may
                     // have changed some settings on the grid directly, like column widths.
-                     s.with(_vm.columns.Select( c => c.create())), 
-                     this.observe_title()
+                     s.with(_vm.columns.Select(c => c.create()))
                  )
               );
-               // TODO: bind to main window's Title
-               var dialog = new SimpleGridSettingsDialog { Title = "Market View Grid Settings", DataContext = vm };
+               vm.SubscribeDisposed(literal_title_source.OnDispatcher().Subscribe(t => vm.title = t));
+               var dialog = new ShellSettingsDialog { DataContext = vm };
               vm.RequestClose += (s, e) => WindowUtilities.force_close(dialog);
               return dialog;
            }))
         };
-         _subscriptions = _bus.subscribe(update_securities_cmd.tag).OnDispatcher().Subscribe(c =>
-            _state_changed?.Invoke(_state = new MarketViewWindowFactory.StartupData(c, _vm.get_filter_states(), _vm.grid_settings_manager.create())));
+         //
+         _vm.selection_changed += on_selection_changed;
+         _subscriptions = new CompositeDisposable(_bus.subscribe(update_securities_cmd.tag).OnDispatcher().Subscribe(c =>
+            _state_changed?.Invoke(_state = new MarketViewWindowFactory.StartupData(c, _vm.get_filter_states(), _vm.grid_settings_manager.create())))) {
+            () => {
+               _vm.selection_changed -= on_selection_changed;
+               _view._grid.Sorting -= on_grid_sorting;
+            }
+         };
+
+         void on_selection_changed((IEnumerable<MarketViewVM.Row> removed, IEnumerable<MarketViewVM.Row> added) change) {
+            // invalidate selected security criteria
+            _selected_security_criteria_backing = null;
+            _sorted_selected_security_criteria_backing = null;
+            show_tas_cmd.RaiseCanExecuteChanged();
+            show_fills_cmd.RaiseCanExecuteChanged();
+            show_synth_create_cmd.RaiseCanExecuteChanged();
+         }
+
+         void on_grid_sorting(object sender, ui.controls.DIYGridSortingEventArgs e) =>
+            _sorted_selected_security_criteria_backing = null;
      }

      public override void Dispose() {
@@ -49,13 +49,8 @@ namespace mbts.spark {
         add_column(TimeAndSalesView.Columns.Aggressor, DefaultColumnHeaders.Aggressor, DefaultColumnWidths.Aggressor, nameof(Row.aggressor_side), aggressor_filter, DataGridFilterKnownTemplates.EnumValues);
         add_column(TimeAndSalesView.Columns.SecurityKey, DefaultColumnHeaders.SecurityKey, DefaultColumnWidths.SecurityKey, nameof(Row.security_key), security_key_filter, DataGridFilterKnownTemplates.Regex);
         void add_column(TimeAndSalesView.Columns col_key, string header, double width, string sort_member_path, IDataGridColumnFilter filter, string filter_template, System.Windows.HorizontalAlignment h_alignment = System.Windows.HorizontalAlignment.Left) =>
-            columns.Add(new TimeAndSalesColumn(
-               col_key
-               , (r) => _get_aggressor_brush(r)
-               , filter
-               , filter_template
-            ) 
-            { Header = header, Width = width, sort_member_path = sort_member_path, horizontal_alignment = h_alignment  }
+            columns.Add(new RenderTextColumn<Row, TimeAndSalesView.Columns>(col_key, r => r[col_key], filter, filter_template, r => _get_aggressor_brush(r))
+            { id = col_id(col_key), Header = header, Width = width, sort_member_path = sort_member_path, horizontal_alignment = h_alignment  }
         );
         
         // be sure to load GridSettings AFTER the columns collection has been populated, the grid settings manager looks columns by id to apply the appropriate settings,
@@ -1,11 +1,13 @@
 using bts;
 using bts.api;
 using bts.shell;
+using bts.shell.fills;
 using bts.spark;
 using mbts.co2;
 using mbts.persist;
 using mbts.ui;
 using mbts.ui.settings;
+using mbts.ui.shell;
 using mbts.ui.spark;
 using mbts.ui.utility;
 using mbts.utils;
@@ -16,7 +18,6 @@ using System.Reactive.Linq;
 using System.Windows;
 using System.Windows.Media;
 using static bts.shell.TimeAndSalesWindowFactory;
-using static mbts.ui.controls.DIYGrid;

 namespace mbts.spark {
   class TimeAndSalesWindow : SparkWindow<StartupData>, ISharedWindow {
@@ -69,19 +70,18 @@ namespace mbts.spark {
            SparkCommands.change_securities_command(() => (update_securities_cmd, _state.security_criteria)),
            // wrap the grid settings view factory in a dialogCommand here since the vm is destroyed/recreated when the security criteria changes
            SparkCommands.window_settings_command(new DialogCommand(() => {
-                   var vm = new WindowSettingsDialogVM<GridSettings, SimpleGridSettingsVM>(
+                   var vm = new ShellSettingsDialogVM<GridSettings, SimpleGridSettingsVM>(
                  _settings_manager,
                  s => s.time_and_sales_grid,
                  UserSettings.FileExtensions.GRID,
                  s => _vm.value.grid_settings_manager.create_vm(
                     // we need to get the most up to date GridSettings when launching b/c users may
                     // have changed some settings on the grid directly, like column widths.
-                     s.with(_vm.value.columns.Select( c => c.create())),
-                     this.observe_title()
+                     s.with(_vm.value.columns.Select(c => c.create()))
                  )
               );
-               // TODO: bind to main window's Title
-               var dialog = new SimpleGridSettingsDialog { Title = "Time and Sales Grid Settings", DataContext = vm };
+               vm.SubscribeDisposed(literal_title_source.OnDispatcher().Subscribe(t => vm.title = t));
+               var dialog = new ShellSettingsDialog { DataContext = vm };
               vm.RequestClose += (s, e) => WindowUtilities.force_close(dialog);
               return dialog;
            }))
@@ -92,8 +92,8 @@ namespace mbts.spark {
         _initialize();

         bool always_true<T>(T _) => true;
-         FillsWindowFactory.StartupData get_fills_startup_data(IReadOnlyList<SecurityImmutable> secs) =>
-            new FillsWindowFactory.StartupData(new FillsWindowFactory.FilterStates {
+         FillsSettings get_fills_startup_data(IReadOnlyList<SecurityImmutable> secs) =>
+            new FillsSettings(new FillsFilterStates {
               security = secs.Count > 0 ? new SecurityCriteria(secs) : _state.security_criteria
            });
         void update_criteria(SecurityCriteria c) {
@@ -59,6 +59,7 @@
    MarketDataTypeTemplate="{StaticResource SimpleValueTextTemplate}"
    MarketDataCalculationTemplate="{StaticResource SimpleValueTextTemplate}"
    ConditionalPriceTypeTemplate="{StaticResource SimpleValueTextTemplate}"
+    ShowQuantityTemplate="{StaticResource SimpleValueTextTemplate}"
  >
    <usp:DataGridParameterCellTemplateConverter.BooleanTemplate>
      <DataTemplate>
@@ -115,6 +116,16 @@
        <c:TickUpDownUInt Value="{Binding value}" IsEnabled="{Binding enabled}"/>
      </DataTemplate>
    </usp:DataGridParameterCellTemplateConverter.UIntTemplate>
+    <usp:DataGridParameterCellTemplateConverter.ShowQuantityTemplate>
+      <DataTemplate>
+        <!-- Note: the motivation for this Template was to enforce a Minimum via the TickUpDownUInt -->
+        <!-- As of 2019/06/17, we believe such a Minimum/Maximum is not actually getting enforced and -->
+        <!-- furthermore is not the appropriate way to go about enforcing said value. It is near the end -->
+        <!-- of the cycle though so that is why we are leaving this Template in here for now until we -->
+        <!-- can come up with a better solution. -->
+        <c:TickUpDownUInt Value="{Binding value}" IsEnabled="{Binding enabled}" />
+      </DataTemplate>
+    </usp:DataGridParameterCellTemplateConverter.ShowQuantityTemplate>
    <usp:DataGridParameterCellTemplateConverter.MarketDataTypeTemplate>
      <DataTemplate>
        <ComboBox SelectedItem="{Binding value}" ItemsSource="{u:EnumBindingSource {u:Nested sp:LegSpreaderParams.Types.MarketDataType}}" ItemTemplate="{StaticResource EnumDescriptionTemplate}"/>
@@ -240,7 +240,7 @@ namespace mbts.ui.spark {
         FrameworkElement _generate_element(IValueConverter cell_template_converter) {
            var rv = new ContentControl();
            rv.SetBinding(ContentControl.ContentProperty, new Binding());
-            rv.SetBinding(ContentControl.ContentTemplateProperty, new Binding(nameof(ICell.data_type)) { Converter = cell_template_converter });
+            rv.SetBinding(ContentControl.ContentTemplateProperty, new Binding() { Converter = cell_template_converter });
            return rv;
         }
      }
@@ -306,17 +306,23 @@ namespace mbts.ui.spark {
      public DataTemplate MarketDataTypeTemplate { get; set; }
      public DataTemplate MarketDataCalculationTemplate { get; set; }
      public DataTemplate ConditionalPriceTypeTemplate { get; set; }
+      public DataTemplate ShowQuantityTemplate { get; set; }

      public object Convert(object value, Type targetType, object parameter, CultureInfo culture) {
-         Type t = (Type)value;
-         if (t == typeof(double)) return DoubleTemplate;
-         else if (t == typeof(bool)) return BooleanTemplate;
-         else if (t == typeof(int)) return IntTemplate;
-         else if (t == typeof(uint)) return UIntTemplate;
-         else if (t == typeof(QuantityMeasure)) return QuantityMeasureTemplate;
-         else if (t == typeof(LegSpreaderParams.Types.MarketDataType)) return MarketDataTypeTemplate;
-         else if (t == typeof(ConditionalQuoting.Types.PriceType)) return ConditionalPriceTypeTemplate;
-         else return null;
+         if (value is ICell cell) {
+            if (cell.row is ShowQuantityQuantityModel) {
+               return ShowQuantityTemplate;
+            }
+            Type t = cell.data_type;
+            if (t == typeof(double)) return DoubleTemplate;
+            else if (t == typeof(bool)) return BooleanTemplate;
+            else if (t == typeof(int)) return IntTemplate;
+            else if (t == typeof(uint)) return UIntTemplate;
+            else if (t == typeof(QuantityMeasure)) return QuantityMeasureTemplate;
+            else if (t == typeof(LegSpreaderParams.Types.MarketDataType)) return MarketDataTypeTemplate;
+            else if (t == typeof(ConditionalQuoting.Types.PriceType)) return ConditionalPriceTypeTemplate;
+         }
+         return null;
      }

      public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) =>
@@ -1,6 +1,7 @@
 using bts.api;
 using bts.api.synthetic;
 using bts.spark;
+using mbts.ui.shell;
 using System;
 using System.Collections.Generic;
 using System.ComponentModel.Composition;
@@ -14,12 +15,14 @@ namespace mbts.spark {
      readonly IBus _bus;
      readonly SyntheticSecurityService _service;
      readonly ErrorReporter _error;
+      readonly uint _user_id;

      [ImportingConstructor]
-      public SpreaderModel(IBus bus, SyntheticSecurityService service, ErrorReporter error) {
+      public SpreaderModel(IBus bus, SyntheticSecurityService service, ErrorReporter error, [Import(LoginContainer.Exports.UserID)]uint user_id) {
         _bus = bus;
         _service = service;
         _error = error;
+         _user_id = user_id;
      }

      public IObservable<IReadOnlyDictionary<uint, ExecutionStrategyImmutable>> strategy => _bus.subscribe(SparkTags.SyntheticstrategiesTag);
@@ -39,29 +42,40 @@ namespace mbts.spark {
            return (result, success);
         });

-      public async Task<ExecutionStrategyImmutable?> lookup_strategy_async(SecurityImmutable security) =>
-         await lookup_strategy_async(security.Id);
+      public Task<ExecutionStrategyImmutable?> lookup_strategy_async(SecurityImmutable security) =>
+         lookup_strategy_async(security.Id);

-      public async Task<ExecutionStrategyImmutable?> lookup_strategy_async(uint id) {
-         var result = await _service.query_security_metadata_async(new MetadataQuery { SecurityKey = { id } });
-         if (result.success) {
-            var metadata = result.value.Data.FirstOrDefault(i => i.SecurityKey == id);
-            if (metadata != null) {
-               return metadata.Strategy;
-            }
+      public Task<ExecutionStrategyImmutable?> lookup_strategy_async(uint id) =>
+         _error.safe_execute(
+            () => _service.query_security_metadata_async(new MetadataQuery { SecurityKey = { id } }),
+            mdc => mdc.Data.Count == 1 && mdc.Data[0].SecurityKey == id,
+            mdc => $"did not find strategy for security id '{id}.'",
+            (mdc, success) => success ? mdc.Data[0].Strategy : (ExecutionStrategyImmutable?)null,
+            "lookup strategy");
+
+      public Task<uint?> create_synthetic(SecurityImmutable synthetic) {
+         if (synthetic.ContractCase != Security.ContractOneofCase.Synthetic)
+            return null;
+         if (synthetic.Synthetic.UserId != _user_id) {
+            var msynth = synthetic.CloneToMutable();
+            msynth.Synthetic.UserId = _user_id;
+            synthetic = new SecurityImmutable(msynth);
         }
-         return null;
+         return _error.safe_execute(
+            () => _service.create_synthetic_async(synthetic),
+            r => r.Error == CreateResult.Types.Error.Ok,
+            r => r.Error.ToString(),
+            (r, success) => success ? r.Key : (uint?)null,
+            "creating synthetic");
      }

-      public async Task<uint?> create_synthetic(SecurityImmutable? synthetic) {
-         var result = await _service.create_synthetic_async(synthetic.Value);
-         return _error.handle_error(result, "Error creating synthetic: {0}", r => r.Error, e => e == CreateResult.Types.Error.Ok, r => new uint?(r.Key), () => null).result;
-      }
-
-      public async Task<bool> save_strategy(uint synthetic, ExecutionStrategyImmutable strategy) {
-         var result = await _service.update_security_metadata_async(new Metadata { SecurityKey = synthetic, Strategy = strategy.CloneToMutable() });
-         return _error.handle_error(result, "Error saving execution strategy: {0}", r => r.Error, e => e == UpdateResult.Types.Error.Ok);
-      }
+      public Task<bool> save_strategy(uint synthetic, ExecutionStrategyImmutable strategy) =>
+         _error.safe_execute(
+            () => _service.update_security_metadata_async(new Metadata { SecurityKey = synthetic, Strategy = strategy.CloneToMutable() }),
+            r => r.Error == UpdateResult.Types.Error.Ok,
+            r => r.Error.ToString(),
+            (r, success) => success,
+            "saving strategy");

      public async Task<bool> verify_name_is_unique(string name) {
         var (result, success) = await strategy_tuple.FirstAsyncTask(SparkUtils.DefaultTimeOut);
@@ -108,6 +108,9 @@ namespace bts.shell {
            NTicks = 2, 
            PriceType = ConditionalQuoting.Types.PriceType.Leg
         };
+         public static NullableQuantity ShowQuantity => new NullableQuantity {
+            Quantity = 1
+         };
         public static QuoteInsideMarketDistanceWithTravel QuoteInsideMarketDistanceWithTravel => new QuoteInsideMarketDistanceWithTravel { Priority = RulePriority };
         public static QuoteInsideMarketDistance QuoteInsideMarketDistance => new QuoteInsideMarketDistance { Priority = RulePriority };
         #endregion
@@ -12,6 +12,9 @@
      <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="/Modules/Spreader/ExecutionStrategyEditor.xaml"/>
      </ResourceDictionary.MergedDictionaries>
+      <Style TargetType="ScrollViewer">
+        <Setter Property="u:ScrollViewerCorrector.FixNestedScrolling" Value="False"/>
+      </Style>
    </ResourceDictionary>
  </Window.Resources>
  <Grid>
@@ -68,25 +68,25 @@ namespace mbts.spark {
               rs => rs.HasValue, select_row_strategy_tuple
            ), SparkCommands.ShowLadder(SparkCommands.KeyGestures.ShowLadder).complete(
               vm_connectable_builder.create(vm => vm.current_security_md), md => md.HasValue, ConvertUtils.ValueOrDefault
-            ), SparkCommands.ShowOrders.complete(() => new bts.shell.orderbook.OrderBookStartupData {
-                  filters = new bts.shell.orderbook.FilterStates {
-                     security_criteria = new SecurityCriteria(_vm.value.row_vms.Select(r => r.security))
-                  }
-               }
-            ), SparkCommands.window_settings_command(new DialogCommand(() => {
-               var vm = new WindowSettingsDialogVM<GridSettings, SimpleGridSettingsVM>(
+            ), SparkCommands.ShowOrders.complete(() => {
+               var ob_settings = bts.shell.orderbook.OrderBookStartupData.Default;
+               ob_settings.filters = new bts.shell.orderbook.FilterStates {
+                  security_criteria = new SecurityCriteria(_vm.value.row_vms.Select(r => r.security))
+               };
+               return ob_settings;
+            }), SparkCommands.window_settings_command(new DialogCommand(() => {
+               var vm = new ShellSettingsDialogVM<GridSettings, SimpleGridSettingsVM>(
                  _settings_manager,
                  us => us.synthetic_management_grid,
                  UserSettings.FileExtensions.GRID,
                  s => _vm.value.grid_settings_manager.create_vm(
                     // we need to get the most up to date GridSettings when launching b/c users may
                     // have changed some settings on the grid directly, like column widths.
-                     s.with(_vm.value.columns.Select( c => c.create())),
-                     this.observe_title()
+                     s.with(_vm.value.columns.Select(c => c.create()))
                  )
               );
-               // TODO: bind to main window's Title
-               var dialog = new SimpleGridSettingsDialog { Title = "Synthetic Management Grid Settings", DataContext = vm };
+               vm.SubscribeDisposed(literal_title_source.OnDispatcher().Subscribe(t => vm.title = t));
+               var dialog = new ShellSettingsDialog { Title = "Synthetic Management Grid Settings", DataContext = vm };
               vm.RequestClose += (s, e) => WindowUtilities.force_close(dialog);
               return dialog;
            }))
@@ -34,6 +34,8 @@ namespace mbts.spark {

         public virtual Type data_type { get; } = typeof(T);

+         public virtual IRowModel row { get => _model; }
+
         public T value {
            get => _model.get_value(_leg_tup);
            set {
@@ -64,6 +66,8 @@ namespace mbts.spark {

         public Type data_type { get; } = typeof(QuantityMeasure);

+         public virtual IRowModel row { get => _model; }
+
         public double ratio {
            get => _get_qm().Ratio;
            set {
@@ -0,0 +1,36 @@
+using bts.shell;
+using mbts.ui.spark;
+
+namespace mbts.spark {
+   partial class SyntheticEditorVM {
+      class ShowQuantityEnabledModel : RowModelBase<bool> {
+         readonly ShowQuantityQuantityModel _quantity;
+
+         public ShowQuantityEnabledModel(ShowQuantityQuantityModel quantity) {
+            _quantity = quantity;
+         }
+
+         public override string display_name => string.Empty;
+         public override string help_text => string.Empty;
+         public override string man_page => string.Empty;
+
+         public override ParameterSection[] section_path { get; } = new[] { Sections.Quote, Subsections.ShowQuantity };
+
+         public override bool get_value(LegSpreaderParamsTuple leg_tup) =>
+            leg_tup.leg_params.QuoteParams.ShowQuantity != null;
+         
+
+         public override void set_value(LegSpreaderParamsTuple leg_tup, bool value) {
+            if (value) {
+               if (leg_tup.leg_params.QuoteParams.ShowQuantity == null) {
+                  leg_tup.leg_params.QuoteParams.ShowQuantity = SyntheticDataHelper.Defaults.ShowQuantity;
+                  _quantity.apply_value(leg_tup);
+               }
+            } else {
+               leg_tup.leg_params.QuoteParams.ShowQuantity = null;
+            }
+            _quantity.set_enabled(leg_tup, value);
+         }
+      }
+   }
+}
@@ -0,0 +1,43 @@
+using bts.shell;
+using bts.spark;
+using mbts.ui.spark;
+using System.Collections.Generic;
+
+namespace mbts.spark {
+   partial class SyntheticEditorVM {
+      internal class ShowQuantityQuantityModel : RowModelBase<uint> {
+         IDictionary<uint, uint> _value_store = new Dictionary<uint, uint>();
+
+         public override string display_name => "Quantity";
+
+         public override string help_text => string.Empty;
+
+         public override string man_page => string.Empty;
+
+         public override ParameterSection[] section_path { get; } = new[] { Sections.Quote, Subsections.ShowQuantity };
+
+         public void apply_value(LegSpreaderParamsTuple leg_tup) =>
+            _get_value(leg_tup).Quantity = _value_from_store(leg_tup);
+
+
+         public override uint get_value(LegSpreaderParamsTuple leg_tup) =>
+            _get_value(leg_tup) is NullableQuantity show_quantity ? show_quantity.Quantity : _value_from_store(leg_tup);
+
+         public override void set_value(LegSpreaderParamsTuple leg_tup, uint value) {
+            _value_store[leg_tup.SecurityKey] = value;
+            if (_get_value(leg_tup) is NullableQuantity show_quantity) {
+               show_quantity.Quantity = value;
+            }
+         }
+
+         protected override bool _get_enabled(LegSpreaderParamsTuple leg_tup) =>
+            _get_value(leg_tup) != null;
+
+         NullableQuantity _get_value(LegSpreaderParamsTuple leg_tup) =>
+            leg_tup.leg_params.QuoteParams.ShowQuantity;
+
+         uint _value_from_store(LegSpreaderParamsTuple leg_tup) =>
+            _value_store.GetValueOrDefault(leg_tup.SecurityKey, _ => SyntheticDataHelper.Defaults.ShowQuantity.Quantity);
+      }
+   }
+}
@@ -32,6 +32,7 @@ namespace mbts.spark {

      internal interface ICell {
         event Action value_changed;
+         IRowModel row { get; }
         Type data_type { get; }
         bool enabled { get; }
      }
@@ -40,7 +41,7 @@ namespace mbts.spark {
         FontWeight font_weight { get; }
      }

-      abstract class RowModelBase<T> : ViewModelBase, IRowModel {
+      internal abstract class RowModelBase<T> : ViewModelBase, IRowModel {
         readonly Dictionary<uint, ReplaySubject<bool>> _enabled_store = new Dictionary<uint, ReplaySubject<bool>>();
         readonly Dictionary<uint, Subject<T>> _override_value_store = new Dictionary<uint, Subject<T>>();

@@ -98,6 +99,10 @@ namespace mbts.spark {
      }

      private static class Subsections {
+         public static ParameterSection ShowQuantity =>
+            new ParameterSection("Show Quantity", true,
+               "The quantity shown when the order is placed.");
+
         public static ParameterSection Throttle =>
            new ParameterSection("Throttle", true,
               "Reduces re-quoting updates by defining a region on either side " +
@@ -73,11 +73,11 @@ namespace mbts.spark {
         _has_working_orders = backing(nameof(has_working_orders), false);
         contract_picker_model = new ContractPickerModel(bus, false, null, new SecurityCriteria(new[] {
            new SecurityCriteriaClause() {
-               exchanges = EnumHelper.get_values_except(Venue.Bts).ToLArray()
+               exchanges = EnumHelper.get_values_except(Venue.Bts).ToArray()
            }
         }));
-         contract_picker_model.cancel_action = _close_new_leg_popup;
-         contract_picker_model.ok_action = () => {
+         contract_picker_model.cancel_action += _close_new_leg_popup;
+         contract_picker_model.ok_action += () => {
            if (!leg_tuples.Any(l => l.leg.Security.Id == contract_picker_model.result.security.Id)) {
               leg_tuples.Add(new LegSpreaderParamsTuple(
                  SyntheticDataHelper.Defaults.ContractLeg(contract_picker_model.result.security),
@@ -134,7 +134,7 @@ namespace mbts.spark {
               _synthetic.ContractSpec.PriceBreak = double.MaxValue;
               _synthetic.ContractSpec.MainFraction = (uint)MathUtils.factor_out(_tick_factors.tick_base, 10);
               _synthetic.ContractSpec.PriceDisplayFormat = (uint)_tick_factors.display_digits();
-               uint? id = await model.create_synthetic(_synthetic);
+               uint? id = await model.create_synthetic(new SecurityImmutable(_synthetic));
               if (id.HasValue && id != 0) {
                  if (await model.save_strategy(id.Value, get_strategy())) {
                     var (smd, success) = await SparkUtils.get_security_md_async(bus, id.Value);
@@ -177,6 +177,8 @@ namespace mbts.spark {
         } else {
            _can_add_leg = backing(nameof(can_add_leg), false);
         }
+         var show_quantity_quantity = new ShowQuantityQuantityModel();
+
         var quote_throttle_outside_ticks = new QuoteThrottleOutsideTicksModel();
         var quote_throttle_inside_ticks = new QuoteThrottleInsideTicksModel();

@@ -211,6 +213,8 @@ namespace mbts.spark {
            //new QuoteHiddenModel(),
            new QuoteQueueHolderModel(),
            new MarketDataTypeModel(),
+            new ShowQuantityEnabledModel(show_quantity_quantity),
+            show_quantity_quantity,
            new QuoteThrottleEnabledModel(quote_throttle_inside_ticks, quote_throttle_outside_ticks),
            quote_throttle_inside_ticks,
            quote_throttle_outside_ticks,
@@ -321,9 +325,12 @@ namespace mbts.spark {
         return string.Empty;
      }

-      static IEnumerable<LegSpreaderParamsTuple> _get_legs(Security synthetic, ExecutionStrategyImmutable strategy) =>
-         synthetic.Synthetic.Legs
-         .Select(l => new LegSpreaderParamsTuple(l, strategy.LegParamsMap[l.Security.Id].Clone()));
+      static IEnumerable<LegSpreaderParamsTuple> _get_legs(Security synthetic, ExecutionStrategyImmutable strategy) {
+         foreach (var l in synthetic.Synthetic.Legs) {
+            if (strategy.LegParamsMap.TryGetValue(l.Security.Id, out var p))
+               yield return new LegSpreaderParamsTuple(l, p);
+         }
+      }

      void _close_new_leg_popup() {
         is_new_leg_popup_open = false;
@@ -168,12 +168,13 @@ namespace mbts.spark {
         void _show_ladder() =>
            _bus.post(SparkTags.ShowLadderTag, md);

-         void _show_order_book() =>
-            _bus.post(SparkTags.ShowOrderBookTag, new bts.shell.orderbook.OrderBookStartupData {
-               filters = new bts.shell.orderbook.FilterStates {
-                  security_criteria = new SecurityCriteria(security)
-               }
-            });
+         void _show_order_book() {
+            var ob_settings = bts.shell.orderbook.OrderBookStartupData.Default;
+            ob_settings.filters = new bts.shell.orderbook.FilterStates {
+               security_criteria = new SecurityCriteria(security)
+            };
+            _bus.post(SparkTags.ShowOrderBookTag, ob_settings);
+         }
      }
   }
 }
@@ -1,14 +1,9 @@
-using bts.api;
+using mbts;
 using mbts.config;
-using mbts.spark;
 using mbts.ui;
-using ProtoBuf;
+using mbts.ui.shell;
 using System;
-using System.Collections.Generic;
-using System.ComponentModel.Composition;
-using System.Threading.Tasks;
 using System.Windows.Controls;
-using mbts;

 namespace bts.shell {
   public class BrowserWindow : IShellWindow {
@@ -75,12 +70,15 @@ namespace bts.shell {
      public string window_type => _window_type;

      public IShellModule Owner {get; set; }
+
      public ShellWindowUI GetContent() { return new ShellWindowUI(_browser); }

      public void GetState(System.IO.Stream save_here) {
         _isw.save(new BrowserWindowState() { uri = uri.ToString() }, save_here);
      }

+      public void on_shell_window_vm(ShellWindowVM shell_window_vm) { }
+
      public void Dispose() {
         if (_browser != null) {
            _browser.Dispose();
@@ -102,5 +100,4 @@ namespace bts.shell {
      }
      #endregion
   }
-   
-}
+}
@@ -86,7 +86,7 @@ namespace mbts.spark {
               } else if (t.definition != null) {
                  return t.definition.subscribe_is_definition_dirty();
               } else return Observable.Return(false);
-            }).RefCount();
+            });
            _commands.Add(new ReactiveSparkCommand(content_src.OnDispatcher().Select(c => $"Save '{c?.name}'"), Icons.DiskFile, () => {
               if (_vm.selected_template is AlgoDefinitionTemplateVM t)
                  _vm.save_template(t).ignore();
@@ -116,7 +116,6 @@ namespace mbts.spark {
            });
            _commands.Add(undo_spark_cmd);
            _resources.Add(can_undo_source.Subscribe(undo_cmd));
-            _resources.Add(can_undo_source.Connect());
            // redo
            var redo_cmd = new ObservantCommand(() => _vm.content_source?.try_redo());
            var redo_spark_cmd = new SparkCommandCommand("Redo", Icons.RedoCircular, redo_cmd);
@@ -133,7 +132,6 @@ namespace mbts.spark {
            });
            _commands.Add(redo_spark_cmd);
            _resources.Add(can_redo_source.Subscribe(redo_cmd));
-            _resources.Add(can_redo_source.Connect());
         }
         // remove
         var remove_spark_cmd = new ObservantSparkCommandCommand<IAlgoStudioContentVM>(Icons.Trash, v => $"Remove '{v?.name}'", v => v != null, value => {
@@ -2,6 +2,7 @@
 using bts.utils;
 using mbts.spark.utilities;
 using System;
+using System.Windows.Media;

 namespace mbts.spark {
   struct AlgoData : IEquatable<AlgoData> {
@@ -36,4 +37,31 @@ namespace mbts.spark {
      public static bool operator ==(AlgoData a, AlgoData b) => a.Equals(b);
      public static bool operator !=(AlgoData a, AlgoData b) => !a.Equals(b);
   }
+
+   struct AlgoDataVM : IEquatable<AlgoDataVM> {
+      public readonly AlgoData data;
+      public readonly AlgoDefinitionMetadata? meta;
+
+      public AlgoDataVM(AlgoData data, AlgoDefinitionMetadata? meta = null) {
+         this.data = data;
+         this.meta = meta;
+      }
+
+      public string name => data.name;
+      public Brush badge_fill => OrderUtils.badge_fill(meta, OrderDataHelper.get_metadata(data.value.CustomCase));
+      public AlgoDisplayGroup group => data.key.display_group();
+
+      public override string ToString() =>
+         data.name;
+
+      public static AlgoDataVM from_data(AlgoData data, AlgoDefinitionMetadata? meta) =>
+         new AlgoDataVM(data, meta);
+
+      public static AlgoDataVM from_data((AlgoData algo, AlgoDefinitionMetadata? meta) tup) =>
+         new AlgoDataVM(tup.algo, tup.meta);
+
+      public bool Equals(AlgoDataVM other) => data == other.data && meta == other.meta;
+      public override bool Equals(object obj) => obj is AlgoDataVM other && Equals(other);
+      public override int GetHashCode() => EqualityComparer.aggregate_hash(data.GetHashCode(), meta.GetHashCode());
+   }
 }
@@ -1,9 +1,91 @@
 using bts.api.orderman;
 using bts.persist.algo;
 using bts.utils;
+using mbts.ui.utility;
+using ProtoBuf;
 using System;
+using System.Linq;

 namespace mbts.spark {
+   [ProtoContract]
+   struct AlgoID : IEquatable<AlgoID> {
+      [ProtoMember(1)]
+      readonly CustomOrderDefinition.CustomOneofCase? _factory_key;
+      [ProtoMember(2)]
+      readonly string _dynamic_key;
+      [ProtoMember(3)]
+      readonly uint? _persisted_key;
+
+      public static readonly AlgoID[] exchange_algo_keys = utilities.OrderDataHelper.outright_order_types
+         .Concat(new CustomOrderDefinition.CustomOneofCase[] { CustomOrderDefinition.CustomOneofCase.Spreader })
+         .Select(cooc => new AlgoID(cooc))
+         .ToArray();
+
+      public AlgoID(CustomOrderDefinition.CustomOneofCase factory_key) {
+         _factory_key = factory_key;
+         _dynamic_key = null;
+         _persisted_key = null;
+      }
+
+      public AlgoID(string dynamic_key) {
+         _factory_key = null;
+         _dynamic_key = dynamic_key;
+         _persisted_key = null;
+      }
+
+      public AlgoID(uint persisted_key) {
+         _factory_key = null;
+         _dynamic_key = null;
+         _persisted_key = persisted_key;
+      }
+
+      public static AlgoID from_custom_def(CustomOrderDefinitionImmutable custom_def) {
+         switch (custom_def.CustomCase) {
+            case CustomOrderDefinition.CustomOneofCase.Composite: return new AlgoID(custom_def.Composite.AlgoTemplateKey);
+            case CustomOrderDefinition.CustomOneofCase.Dynamic: return new AlgoID(custom_def.Dynamic.DynamicOrderType);
+            default: return new AlgoID(custom_def.CustomCase);
+         }
+      }
+
+      public static AlgoID from_algo_key(AlgoKey key, IMaskIndexInt32<string> dynamic_type_index) {
+         switch (key.mode) {
+            case AlgoKey.Mode.Factory:
+               return AlgoStructureSerializer.to_algo_id(key.factory.structure, dynamic_type_index);
+            case AlgoKey.Mode.Persisted:
+               return new AlgoID(key.persisted.id_uint);
+         }
+         return new AlgoID(CustomOrderDefinition.CustomOneofCase.None);
+      }
+
+      public static AlgoKey to_algo_key(AlgoID id, IMaskIndexInt32<string> dynamic_type_index) {
+         if (id._factory_key.HasValue)
+            return new AlgoKey(id._factory_key.Value);
+         if (id._persisted_key.HasValue)
+            return new AlgoKey(new AlgoPersistedKey(id._persisted_key.Value));
+         if (id._dynamic_key != null)
+            return new AlgoKey(new AlgoNameStructureKey(id._dynamic_key, AlgoStructureSerializer.structure_key(dynamic_type_index.to_int(id._dynamic_key))));
+         return default;
+      }
+
+      public bool Equals(AlgoID other) =>
+         _factory_key == other._factory_key &&
+         _dynamic_key == other._dynamic_key &&
+         _persisted_key == other._persisted_key;
+
+      public override bool Equals(object obj) =>
+         obj is AlgoID other && Equals(other);
+
+      public override int GetHashCode() =>
+         EqualityComparer.aggregate_hash(
+            _factory_key?.GetHashCode() ?? 0,
+            _dynamic_key?.GetHashCode() ?? 0,
+            _persisted_key?.GetHashCode() ?? 0);
+
+      public static bool operator ==(AlgoID a, AlgoID b) => a.Equals(b);
+      public static bool operator !=(AlgoID a, AlgoID b) => !a.Equals(b);
+   }
+
+   /// TODO: Remove <see cref="AlgoKey"/>, and redirect references to <see cref="AlgoID"/>.
   struct AlgoKey : IEquatable<AlgoKey> {
      readonly AlgoPersistedKey? _persisted_key;
      readonly AlgoNameStructureKey? _factory_key;
@@ -83,4 +165,4 @@ namespace mbts.spark {

      InvalidOperationException _unexpected_mode_ex() => new InvalidOperationException($"Unexpected Mode '{mode}.'");
   }
-}
+}
@@ -70,6 +70,12 @@ namespace mbts.spark {
      public static CustomOrderDefinitionImmutable build_algo(this AlgoStructureKey structure_key, DynamicOrderHelper dynamic_helper) =>
         parsei(structure_key.structure, dynamic_helper);

+      public static CustomOrderDefinition.CustomOneofCase order_type(this AlgoStructureKey structure_key) =>
+         structure_key.structure.Count > 0 ? (CustomOrderDefinition.CustomOneofCase)structure_key.structure[0] : CustomOrderDefinition.CustomOneofCase.None;
+
+      public static AlgoStructureKey structure_key(int dynamic_type) =>
+         new AlgoStructureKey(new[] { dynamic_type | _dynamic_mask });
+
      public static AlgoStructureKey structure_key(CustomOrderDefinitionImmutable algo, IMaskIndexInt32<string> dynamic_type_index) =>
         new AlgoStructureKey(to_array(algo, dynamic_type_index));

@@ -100,6 +106,13 @@ namespace mbts.spark {
         return mdef;
      }

+      public static AlgoID to_algo_id(AlgoStructureKey key, IMaskIndexInt32<string> dynamic_type_index) {
+         if (key.structure.Count == 0)
+            return new AlgoID(CustomOrderDefinition.CustomOneofCase.None);
+         int i = key.structure[0];
+         return BitHelper.remove_flags(ref i, _dynamic_mask) ? new AlgoID(dynamic_type_index.from_int(i)) : new AlgoID((CustomOrderDefinition.CustomOneofCase)i);
+      }
+
      static void _build_structure(CustomOrderDefinition algo, ref int[] structure, IMaskIndexInt32<string> dynamic_type_index) {
         if (structure == null || structure.Length == 0)
            structure = new int[1];
@@ -1,5 +1,4 @@
 using bts;
-using bts.api;
 using bts.api.core;
 using bts.api.orderman;
 using bts.persist.algo;
@@ -110,38 +109,24 @@ namespace mbts.spark {
      public void Dispose() =>
         Disposable.dispose(ref _dispose);

-      async Task<AlgoData?> _create_definition(CompositeAlgoDefinitionImmutable definition) {
-         if (_try_get_user(out uint user_id)) {
-            return await _create_definition(definition, user_id);
-         } else {
-            _report_no_user_id(ActionMetadata.CreateDefinition);
-         }
-         return null;
-      }
+      async Task<AlgoData?> _create_definition(CompositeAlgoDefinitionImmutable definition) =>
+         await _create_definition(definition, _admin_model.user.id);

      async Task<AlgoTemplateData?> _create_template(AlgoTemplateImmutable template) {
-         if (_try_get_user(out uint user_id)) {
-            var (value, success) = await _error_reporter.safe_execute(() => _service.create_template_async(
-               new TemplateCreateRequest { UserId = user_id, NewTemplate = template.CloneToMutable() }),
-               r => r.Success, r => r.ErrMsg, ActionMetadata.CreateTemplate);
-            if (success)
-               return _Utils.template_data(value.Record);
-         } else {
-            _report_no_user_id(ActionMetadata.CreateTemplate);
-         }
+         var (value, success) = await _error_reporter.safe_execute(() => _service.create_template_async(
+            new TemplateCreateRequest { UserId = _admin_model.user.id, NewTemplate = template.CloneToMutable() }),
+            r => r.Success, r => r.ErrMsg, ActionMetadata.CreateTemplate);
+         if (success)
+            return _Utils.template_data(value.Record);
         return null;
      }

      async Task<AlgoTemplateData?> _update_template(AlgoTemplateRecordImmutable template) {
-         if (_try_get_user(out uint user_id)) {
-            var (value, success) = await _error_reporter.safe_execute(() => _service.update_template_async(
-               new TemplateUpdateRequest { Key = template.Key, UpdatedTemplate = template.AlgoTemplate.CloneToMutable() }),
-               r => r.Success, r => r.ErrMsg.ToString(), ActionMetadata.UpdateTemplate);
-            if (success)
-               return _Utils.template_data(template);
-         } else {
-            _report_no_user_id(ActionMetadata.UpdateTemplate);
-         }
+         var (value, success) = await _error_reporter.safe_execute(() => _service.update_template_async(
+            new TemplateUpdateRequest { Key = template.Key, UpdatedTemplate = template.AlgoTemplate.CloneToMutable() }),
+            r => r.Success, r => r.ErrMsg.ToString(), ActionMetadata.UpdateTemplate);
+         if (success)
+            return _Utils.template_data(template);
         return null;
      }

@@ -175,17 +160,6 @@ namespace mbts.spark {
      void _report_no_user_id(string desc) =>
         _error_reporter.report_error($"{desc} failed: did not find current user id");

-      bool _try_get_user(out uint id) {
-         var user = _admin_model.get_current_user();
-         if (user.HasValue) {
-            id = user.Value.id;
-            return true;
-         } else {
-            id = 0;
-            return false;
-         }
-      }
-
      // used for error handling/reporting
      interface IActionMetadata {
         string desc { get; }
@@ -1,14 +1,11 @@
 using bts;
-using bts.api;
 using bts.api.core;
 using bts.api.orderman.algo;
 using bts.persist.algo;
 using bts.spark;
-using mbts.spark.utilities;
 using mbts.utils;
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using System.Reactive.Linq;
 using System.Threading.Tasks;

@@ -27,7 +24,12 @@ namespace mbts.spark {
         _admin_model = admin_model;
         _error_reporter = error_reporter;
         this.ui_configuration = ui_configuration;
-         definitions = service.subscribei_algo_definitions().Filter(r => r.Metadata.IsActive).SelectKeyValue(_definition_data, d => d.key).Table().Cache();
+         definitions =
+            service.subscribei_algo_definitions()
+            .Filter(r => r.Metadata.IsActive && r.Metadata.CreatorUserId == _admin_model.user.id)
+            .SelectKeyValue(_definition_data, d => d.key)
+            .Table()
+            .Cache();
      }

      public IObservable<TableUpdate<AlgoData, AlgoKey>> definitions { get; }
@@ -39,15 +41,11 @@ namespace mbts.spark {
         Observable.Return(TableUpdate<AlgoTemplateData, AlgoKey>.mk_empty(t => t.key));

      public async Task<AlgoData?> save_definition(AlgoData definition_data) {
-         if (_try_get_user(out uint user_id)) {
-            var (value, success) = await _error_reporter.safe_execute(() => _service.save_algo_definition_async(
-               _with_key(new AlgoDefinitionUpdateRequest { UserId = user_id, Algo = _template(definition_data) }, definition_data.key)),
-               r => r.Success, r => r.ErrorMessage, "saving template");
-            if (success)
-               return _definition_data(new AlgoDefinitionRecordImmutable(value.Record));
-         } else {
-            _report_no_user_id("save template");
-         }
+         var (value, success) = await _error_reporter.safe_execute(() => _service.save_algo_definition_async(
+            _with_key(new AlgoDefinitionUpdateRequest { UserId = _admin_model.user.id, Algo = _template(definition_data) }, definition_data.key)),
+            r => r.Success, r => r.ErrorMessage, "saving template");
+         if (success)
+            return _definition_data(new AlgoDefinitionRecordImmutable(value.Record));
         return null;
      }

@@ -105,16 +103,5 @@ namespace mbts.spark {

      void _report_no_user_id(string desc) =>
         _error_reporter.report_error($"{desc} failed: did not find current user id");
-
-      bool _try_get_user(out uint id) {
-         var user = _admin_model.get_current_user();
-         if (user.HasValue) {
-            id = user.Value.id;
-            return true;
-         } else {
-            id = 0;
-            return false;
-         }
-      }
   }
 }
@@ -70,7 +70,7 @@ namespace mbts.spark {
            is_hidden.GetHashCode(),
            abbreviation == null ? 0 : abbreviation.GetHashCode(),
            badge_color?.GetHashCode() ?? 0,
-            EqualityComparer.aggregate_hash_limited(_favorite_templates));
+            _favorite_templates == null ? 0 : EqualityComparer.aggregate_hash_limited(_favorite_templates));

      public static bool operator ==(AlgoDefinitionMetadata a, AlgoDefinitionMetadata b) => a.Equals(b);
      public static bool operator !=(AlgoDefinitionMetadata a, AlgoDefinitionMetadata b) => !a.Equals(b);
@@ -1,23 +1,36 @@
 using bts.api.core;
+using bts.api.orderman;
 using bts.utils;
 using mbts.collections;
 using mbts.ui.utilities;
 using mbts.utils;
 using System;
 using System.Collections.Generic;
+using System.Linq;

 namespace mbts.spark {
   static class AlgoCollectionHelper {
      public static readonly IComparer<AlgoDefinitionVM> algo_definition_vm_comparer =
         new ComparerBuilder<AlgoDefinitionVM>(
-            new [] {
+            new[] {
               Comparer<AlgoDefinitionVM>.Create(_CompareUtils.compare_groups),
               Comparer<AlgoDefinitionVM>.Create(_CompareUtils.compare_names)
            }).to_comparer().to_safe();

+      public static readonly IComparer<AlgoData> algo_data_comparer =
+         new ComparerBuilder<AlgoData>(
+            new[] {
+               Comparer<AlgoData>.Create(_CompareUtils.compare_groups),
+               Comparer<AlgoData>.Create(_CompareUtils.compare_names)
+            }
+         ).to_comparer();
+
+      public static readonly IComparer<AlgoDataVM> algo_data_vm_comparer =
+         algo_data_comparer.wrap<AlgoData, AlgoDataVM>(vm => vm.data);
+
      public static readonly IComparer<IAlgoVM> algo_vm_comparer =
         new ComparerBuilder<IAlgoVM>(
-            new [] {
+            new[] {
               Comparer<IAlgoVM>.Create(_CompareUtils.compare_groups),
               Comparer<IAlgoVM>.Create(_CompareUtils.compare_names)
            }).to_comparer().to_safe();
@@ -34,18 +47,50 @@ namespace mbts.spark {
         }
      }

-      public static void update_persisted_definition_wrappers(ObservableKeyedCollection<IAlgoVM, AlgoKey> target, TableUpdate<AlgoData, AlgoKey> update, Func<AlgoData, AlgoDefinitionVM> factory) {
+      public static void update_persisted_definition_wrappers(IDictionary<AlgoKey, IAlgoVM> target, TableUpdate<AlgoData, AlgoKey> update, Func<AlgoData, AlgoDefinitionVM> factory) {
         foreach (var d in update.removed)
            target.Remove(d.key);
-         foreach (var d in update.changed)
-            target[d.key].load_from(d.value);
+         foreach (var d in update.changed) {
+            var vm = target[d.key];
+            if (vm is AlgoVMWrapper wrapper) {
+               wrapper.value.load(d);
+            } else vm.load_from(d.value);
+         }
         foreach (var d in update.added) {
            if (target.TryGetValue(d.key, out IAlgoVM def)) {
               def.load_from(d.value);
-            } else target.Add(new AlgoVMWrapper(factory(d)));
+            } else target.Add(d.key, new AlgoVMWrapper(factory(d)));
         }
      }

+      public static void commit_all(this IEnumerable<AlgoParamRowVM> algo_param_rows) =>
+         algo_param_rows.Select(r => r.param).commit_all();
+
+      public static void commit_all(this IEnumerable<IAlgoParamVM> algo_params) {
+         foreach (var p in algo_params)
+            p.mark_committed();
+      }
+
+      public static void revert_all(this IEnumerable<AlgoParamRowVM> algo_param_rows) =>
+         algo_param_rows.Select(r => r.param).revert_all();
+
+      public static void revert_all(this IEnumerable<IAlgoParamVM> algo_params) {
+         foreach (var p in algo_params)
+            p.revert();
+      }
+
+      public static AlgoDisplayGroup display_group(CustomOrderDefinition.CustomOneofCase order_type) => order_type.is_bts_algo_type() ? AlgoDisplayGroup.BTS : AlgoDisplayGroup.Exchange;
+
+      public static AlgoDisplayGroup display_group(this AlgoKey key) {
+         switch (key.mode) {
+            case AlgoKey.Mode.Factory: return display_group(key.factory.structure.order_type());
+            case AlgoKey.Mode.Unpersisted:
+            case AlgoKey.Mode.Persisted:
+               return AlgoDisplayGroup.Studio;
+         }
+         return AlgoDisplayGroup.BTS;
+      }
+
      static class _CompareUtils {
         static AlgoDisplayGroup[] _sorted_groups = new[] {
            AlgoDisplayGroup.Exchange,
@@ -57,14 +102,20 @@ namespace mbts.spark {
         public static int compare_groups(AlgoDefinitionVM a, AlgoDefinitionVM b) =>
            Array.IndexOf(_sorted_groups, a.group).CompareTo(Array.IndexOf(_sorted_groups, b.group));

+         public static int compare_groups(AlgoData a, AlgoData b) =>
+            Array.IndexOf(_sorted_groups, a.key.display_group()).CompareTo(Array.IndexOf(_sorted_groups, b.key.display_group()));
+
         public static int compare_groups(IAlgoVM a, IAlgoVM b) =>
            Array.IndexOf(_sorted_groups, a.group).CompareTo(Array.IndexOf(_sorted_groups, b.group));

         public static int compare_names(AlgoDefinitionVM a, AlgoDefinitionVM b) =>
            DisplayNameHelper.compare_alpha_numeric(a.name, b.name);

+         public static int compare_names(AlgoData a, AlgoData b) =>
+            DisplayNameHelper.compare_alpha_numeric(a.name, b.name);
+
         public static int compare_names(IAlgoVM a, IAlgoVM b) =>
            DisplayNameHelper.compare_alpha_numeric(a.display_name, b.display_name);
      }
   }
-}
+}
@@ -78,7 +78,7 @@ namespace mbts.spark {
         _dispose = new System.Reactive.Disposables.CompositeDisposable(
            as_demuxer().subscribe_many(_refresh_on_local_change.execute, nameof(name), nameof(abbreviation), nameof(is_default), nameof(is_favorite)),
            owner.observe_algo_root().Subscribe(r => _algo_root.set(get_algo_root(r))),
-            _algo_root.observe_current(true).SelectManyInSeries(r => r?.subscribe_definition()).RefCount().Subscribe(_ => _refresh_on_local_change.execute()),
+            _algo_root.observe_current(true).SelectManyInSeries(r => r?.subscribe_definition()).Subscribe(_ => _refresh_on_local_change.execute()),
            Disposable.wrap_collection(algo_map.Values)) {
            () => {
               _can_redo.Changed -= on_can_redo_changed;
@@ -202,6 +202,7 @@ namespace mbts.spark {
      public string name { get => _name.Value; set => _name.set(value); }
      public string abbreviation { get => _abbreviation.Value; set => _abbreviation.set(value); }
      public ObservableCollection<IAlgoVM> algo_roots => _algo_roots;
+      public IDictionary<AlgoKey, IAlgoVM> algo_roots_index => _algo_roots;
      public IReadOnlyObservableCollection<IAlgoVM> algos_view { get; }
      public IAlgoVM algo_root { get => _algo_root.Value; set => _algo_root.set(value); }
      public IAlgoVM visible_algo_root => _visible_algo_root.Value;
@@ -372,7 +373,12 @@ namespace mbts.spark {
      }

      public void load_many(IEnumerable<CustomOrderDefinitionImmutable> defs) {
-         var def_list = defs as IList<CustomOrderDefinitionImmutable> ?? defs.ToList();
+         /// don't load composite algos; we don't support recursive composites (<see cref="OrderUtils.actual(CustomOrderDefinitionImmutable)"/>)
+         if (defs is IList<CustomOrderDefinitionImmutable> def_list) {
+            def_list = def_list.WrapSelector(d => d.actual(), null);
+         } else {
+            def_list = defs.Select(d => d.actual()).ToList();
+         }
         switch (def_list.Count) {
            case 0: algo_root = null; break;
            case 1: load_def(def_list[0]); break;
@@ -18,12 +18,16 @@ namespace mbts.spark {
         this.algo = algo;
         this.parent = parent;
         _template_key = template_key;
+         param.permissions_changed += on_permissions_changed;
+         _dispose = Disposable.Create(() => param.permissions_changed -= on_permissions_changed);
+         void on_permissions_changed(AlgoParamPermissions oldval, AlgoParamPermissions newval) => RaisePropertyChanged(nameof(permissions));
      }

      public event Action invalidated;

      public IAlgoVM algo { get; set; }
      public IAlgoParamVM param { get; }
+      public AlgoParamPermissions permissions => param.permissions;
      public AlgoParamRowVM parent { get; }
      public int level => parent == null ? 0 : parent.level + 1;
      public string path_disambiguation {
@@ -54,7 +54,7 @@ namespace mbts.spark {
         _model = model;
         _selected_definition = backing<AlgoDefinitionVM>(nameof(selected_definition));
         _selected_template = backing<AlgoDefinitionTemplateVM>(nameof(selected_template));
-         _editable_content = backing(nameof(editable_content), observe_selected().SelectManyInSeries(tup => tup.template?.observe_algo_root() ?? tup.definition?.observe_algo_root()).RefCount().OnDispatcher());
+         _editable_content = backing(nameof(editable_content), observe_selected().SelectManyInSeries(tup => tup.template?.observe_algo_root() ?? tup.definition?.observe_algo_root()).OnDispatcher());
         _definitions_update_buffer = new TableUpdateBuffer<AlgoData, AlgoKey>(def => def.key);
         _definitions_view = new ListCollectionView<AlgoDefinitionVM>(definitions) {
            CustomSort = AlgoCollectionHelper.algo_definition_vm_comparer.to_non_generic()
@@ -77,7 +77,7 @@ namespace mbts.spark {
               definitions_view.Refresh();
            }),
            ObservableAutoWrapper.connect(observe_selected().Select(t => t.template?.edit_pane_visual_states ?? t.definition?.edit_pane_visual_states ?? new ObservableCollection<string>()), content_visual_states),
-            observe_selected().SelectManyInSeries(t => t.template?.observe_is_dirty() ?? t.definition?.subscribe_is_definition_or_any_templates_dirty() ?? Observable.Return(false)).RefCount().OnDispatcher()
+            observe_selected().SelectManyInSeries(t => t.template?.observe_is_dirty() ?? t.definition?.subscribe_is_definition_or_any_templates_dirty() ?? Observable.Return(false)).OnDispatcher()
            .Subscribe(new CompositeObserver<bool>(save_cmd, revert_cmd) { val => {
               _save_cmd_tooltip.refresh();
               _revert_cmd_tooltip.refresh();
@@ -29,13 +29,12 @@ namespace mbts.spark {
            nameof(editing_permissions),
            nameof(definition),
            nameof(display_name)
-         },
-         _value_echo_props = new HashSet<string> {
-            nameof(AlgoDefinitionVM.name),
-            nameof(AlgoDefinitionVM.abbreviation),
-            nameof(AlgoDefinitionVM.badge_fill),
-            nameof(AlgoDefinitionVM.can_undo),
-            nameof(AlgoDefinitionVM.can_redo)
+         };
+      static readonly IReadOnlyDictionary<string, string>
+         _value_echo_props = new Dictionary<string, string> {
+            { nameof(AlgoDefinitionVM.name), nameof(display_name) },
+            { nameof(AlgoDefinitionVM.abbreviation), nameof(abbreviation) },
+            { nameof(AlgoDefinitionVM.badge_fill), nameof(meta) }
         };
      readonly ObservableAggregateCollection<IAlgoSelector> _child_algo_selectors = new ObservableAggregateCollection<IAlgoSelector>();
      readonly ObservableAggregateCollection<IAlgoParamVM> _algo_params = new ObservableAggregateCollection<IAlgoParamVM>();
@@ -143,8 +142,8 @@ namespace mbts.spark {
               RaisePropertyChanged(e.PropertyName);
         }
         void on_value_prop_changed(object sender, PropertyChangedEventArgs e) {
-            if (_value_echo_props.Contains(e.PropertyName))
-               RaisePropertyChanged(e.PropertyName);
+            if (_value_echo_props.TryGetValue(e.PropertyName, out string wrapper_prop))
+               RaisePropertyChanged(wrapper_prop);
         }
      }

@@ -377,7 +377,7 @@
          <DataTemplate>
            <ComboBox 
              HorizontalAlignment="Stretch"
-              ItemsSource="{Binding param.value, Converter={StaticResource EnumItemsSourceConverter}, Mode=OneTime}"
+              ItemsSource="{Binding Converter={x:Static usp:AlgoEditorGridView.NullableEnumParamRowItemsSourceConverter}}"
              ItemTemplate="{StaticResource NullableEnumDescriptionTemplate}"
              SelectedItem="{Binding param.value, UpdateSourceTrigger=PropertyChanged}"
            />
@@ -481,10 +481,14 @@
        <usp:AlgoEditorGridRowStyleSelector.DefaultStyle>
          <Style TargetType="DataGridRow">
            <Style.Triggers>
-              <DataTrigger Binding="{Binding param.is_dirty}" Value="{u:True}">
+              <MultiDataTrigger>
+                <MultiDataTrigger.Conditions>
+                  <Condition Binding="{Binding param.is_dirty}" Value="{u:True}"/>
+                  <Condition Binding="{Binding AnimateDirty, RelativeSource={RelativeSource AncestorType=usp:AlgoEditorGridView}}" Value="{u:True}"/>
+                </MultiDataTrigger.Conditions>
                <Setter Property="Background" Value="#8098FB98"/>
                <Setter Property="ToolTip" Value="Value has been modified."/>
-              </DataTrigger>
+              </MultiDataTrigger>
            </Style.Triggers>
          </Style>
        </usp:AlgoEditorGridRowStyleSelector.DefaultStyle>
@@ -5,8 +5,8 @@ using mbts.ui.controls;
 using mbts.ui.converters;
 using mbts.ui.utility;
 using System;
+using System.Collections;
 using System.Collections.Generic;
-using System.Collections.ObjectModel;
 using System.Linq;
 using System.Windows;
 using System.Windows.Controls;
@@ -19,7 +19,19 @@ namespace mbts.ui.spark {
      public static readonly IValueConverter
         GeneralVisualStateConverter = ValueConverter.create<bool, string>(is_read_only => is_read_only ? VisualStateNames.General.ReadOnly : VisualStateNames.General.Normal),
         AlgoRootVisualStateConverter = ValueConverter.create<bool, string>(show_bbo => show_bbo ? VisualStateNames.AlgoRoot.Active : VisualStateNames.AlgoRoot.Inactive),
-         AlgoRootComboBoxMarginConverter = ValueConverter.create<double, Thickness>(name_col_width => new Thickness(name_col_width + 8, 0, 0, 0));
+         AlgoRootComboBoxMarginConverter = ValueConverter.create<double, Thickness>(name_col_width => new Thickness(name_col_width + 8, 0, 0, 0)),
+         NullableEnumParamRowItemsSourceConverter = ValueConverter.create<AlgoParamRowVM, IEnumerable>(param_row => {
+            if (param_row?.param != null) {
+               var tenum = param_row.param.GetType().GetInterfaceGenericArgument(AlgoParamTemplateSelector.generic_algo_param_itype);
+               if (tenum.IsNullable()) {
+                  // .First() should be safe, since we know this is a Nullable<T>.
+                  tenum = tenum.GetGenericArguments().First();
+               }
+               if (tenum.IsEnum)
+                  return Enum.GetValues(tenum);
+            }
+            return null;
+         });

      public static readonly MouseButtonEventHandler PayupTicksMouseButtonHandler = (s, e) => {
         if ((s as Hyperlink)?.Command is ICommand cmd) {
@@ -40,6 +52,8 @@ namespace mbts.ui.spark {
         // AlgoParamRows
         AlgoParamRowsViewSource = new CollectionViewSource<ListCollectionView<AlgoParamRowVM>>();
         BindingOperations.SetBinding(AlgoParamRowsViewSource, CollectionViewSource.SourceProperty, new Binding(nameof(AlgoParamRows)) { Source = this });
+         AlgoParamRowsViewSource.IsLiveFilteringRequested = true;
+         AlgoParamRowsViewSource.LiveFilteringProperties.Add(nameof(AlgoParamRowVM.permissions));
         AlgoParamRowsViewSource.Filter += param_rows_filter;
         DataGridEditHelper.set_hooks(this);
         void param_rows_filter(object sender, FilterEventArgs e) =>
@@ -64,6 +78,16 @@ namespace mbts.ui.spark {
         }
      }

+      #region AnimateDirtyParams
+      public static readonly DependencyProperty AnimateDirtyProperty =
+         WPFHelper.create_dp<bool, AlgoEditorGridView>(nameof(AnimateDirty), true);
+
+      public bool AnimateDirty {
+         get => (bool)GetValue(AnimateDirtyProperty);
+         set => SetValue(AnimateDirtyProperty, value);
+      }
+      #endregion
+
      #region IsReadOnly
      public static readonly DependencyProperty IsReadOnlyProperty =
         WPFHelper.create_dp<bool, AlgoEditorGridView>(nameof(IsReadOnly));
@@ -19,6 +19,8 @@ namespace mbts.ui.spark {

   /// TODO: remove this class and just use a <see cref="KeyedTemplateSelector"/>.
   class AlgoParamTemplateSelector : DataTemplateSelector {
+      public static readonly Type generic_algo_param_itype = typeof(IAlgoParamVM<>);
+
      KeyedCollection<TemplateSelectorKeyValue, string> _keyed_templates = new KeyedCollection<TemplateSelectorKeyValue, string>(tsk => tsk.Key);

      public DataTemplate BoolTemplate { get; set; }
@@ -58,7 +60,7 @@ namespace mbts.ui.spark {
            if (pvm is IAlgoParamVM<QuantityMeasureImmutable?>) return QuantityMeasureTemplate;
            if (pvm is IAlgoParamVM<ExecutionStrategy>) return ExecutionStrategyTemplate;
            if (pvm is IAlgoParamVM<Google.Protobuf.WellKnownTypes.Timestamp>) return TimestampTemplate;
-            var targ = ReflectionHelper.GetGenericTypeArgs(pvm.GetType(), typeof(IAlgoParamVM<>)).FirstOrDefault();
+            var targ = ReflectionHelper.GetGenericTypeArgs(pvm.GetType(), generic_algo_param_itype).FirstOrDefault();
            if (targ != null) {
               if (targ.IsEnum)
                  return EnumTemplate;
@@ -2,6 +2,7 @@
 using bts.api.core;
 using bts.api.orderman;
 using bts.collections;
+using bts.shell.fills;
 using bts.spark;
 using bts.utils;
 using mbts.collections;
@@ -18,11 +19,9 @@ using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Collections.Specialized;
-using System.ComponentModel;
 using System.Linq;
 using System.Reactive.Disposables;
 using System.Reactive.Linq;
-using System.Reactive.Subjects;
 using System.Windows.Data;
 using System.Windows.Media;
 using static bts.api.orderman.Fill.Types;
@@ -34,22 +33,19 @@ using OrderType = bts.api.orderman.CustomOrderDefinition.CustomOneofCase;
 namespace mbts.spark {
   class FillsVM : DisposableViewModelBase, IHandleGridSorting {
      readonly OrdersModel _model;
-      readonly OperableCollection<Row, FillTuple, string> _rows;
-      readonly DIYGridSortManager<Columns> _sort_manager;
-      readonly IDIYGridFiltersManager<FillTuple, Columns, FilterStates> _filters_manager;
+      readonly DIYGridRowsManager<FillTuple, Columns, FillsFilterStates> _rows_manager;
      readonly ObservableKeyedCollection<ColumnBase, Columns> _columns = new ObservableKeyedCollection<ColumnBase, Columns>(_col_key);
-      List<(ColumnBase col, Columns key, ListSortDirection direction)> _active_comparers = new List<(ColumnBase col, Columns key, ListSortDirection direction)>();
      IWindowSettingsManager<GridSettings> _settings_manager;
      int _total_row_count;

-      public FillsVM(IBus bus, OrdersModel model, IObservable<StartupData> state_obs, IWindowSettingsManager<GridSettings> settings_manager)
+      public FillsVM(IBus bus, OrdersModel model, IObservable<FillsSettings> state_obs, IWindowSettingsManager<GridSettings> settings_manager)
         : this(bus, model, state_obs, _get_observable(bus, model, state_obs), settings_manager) { }

-      public FillsVM(IBus bus, OrdersModel model, IObservable<StartupData> state_obs, IObservable<TableUpdate<FillTuple, string>> fills_source, IWindowSettingsManager<GridSettings> settings_manager) {
+      public FillsVM(IBus bus, OrdersModel model, IObservable<FillsSettings> state_obs, IObservable<TableUpdate<FillTuple, string>> fills_source, IWindowSettingsManager<GridSettings> settings_manager) {
         _model = model;
         _settings_manager = settings_manager;
         /// Columns
-         var col_tups = new ObservableKeyedCollection<DIYGridColumnData<FillTuple, Columns, FilterStates>, Columns>(c => c.key);
+         var col_tups = new ObservableKeyedCollection<DIYGridColumnData<FillTuple, Columns, FillsFilterStates>, Columns>(c => c.key);
         // security
         add_col(Columns.Security, DefaultColumnHeaders.Security, r => r.security.ToString(),
            DiscreteValuesFilterVM.Create<FillTuple, SecurityImmutable, SecurityCriteria>(
@@ -64,6 +60,14 @@ namespace mbts.spark {
            equality_comparer: SecurityDataHelper.EqualityComparer.IDComparer,
            comparer: Comparer<SecurityImmutable>.Default
         ), DataGridFilterKnownTemplates.DiscreteValues, DefaultColumnWidths.Security);
+         // symbol
+         add_col(Columns.Symbol, DefaultColumnHeaders.Symbol, r => r.security.Symbol,
+            DiscreteValuesFilterVM.Create<FillTuple, string>(
+               co2.UserSymbol.get_all().Select(u => u.symbol).Distinct().ToList(),
+               ft => ft.security?.Symbol ?? string.Empty,
+               nameof(OrderBookRowVM.symbol)),
+               DataGridFilterKnownTemplates.DiscreteValues,
+               DefaultColumnWidths.Symbol);
         // order type
         var order_type_filter = dv_filter(OrderDataHelper.all_order_types, r => r.order?.order_type() ?? OrderType.None);
         add_col_expl(Columns.OrderType,
@@ -86,29 +90,29 @@ namespace mbts.spark {
         add_col(Columns.FillKey, DefaultColumnHeaders.FillKey, r => r.fill_key.ToString(), new RegexFilterVM<FillTuple>(r => r.fill.FillKey), DataGridFilterKnownTemplates.Regex, DefaultColumnWidths.FillKey);
         add_col(Columns.OrderKey, DefaultColumnHeaders.OrderKey, r => r.order_key.ToString(), new RegexFilterVM<FillTuple>(r => r.fill.OrderKey.ToString()), DataGridFilterKnownTemplates.Regex, DefaultColumnWidths.OrderKey);
         add_col(Columns.SecurityKey, DefaultColumnHeaders.SecurityKey, r => r.security_key.ToString(), new RegexFilterVM<FillTuple>(r => r.fill.SecurityKey.ToString()), DataGridFilterKnownTemplates.Regex, DefaultColumnWidths.SecurityKey);
-         /// Rows
-         _rows = new OperableCollection<Row, FillTuple, string>(
-            (ft, fk) => new Row(ft, model),
-            ft => ft.fill.FillKey,
-            new ComparerBuilder<FillTuple>(new[] {
-               _get_column_comparer(Columns.FillTime),
-               _get_column_comparer(Columns.FillKey)
-            }).to_comparer());
-         // row sort/filter managers
-         _sort_manager = new DIYGridSortManager<Columns>(col_tups.WrapSelector(t => (t.col, t.key)), Columns.FillKey);
-         _filters_manager = DIYGridFiltersManager.create(col_tups);
-         var rows_manager = new DIYGridRowsManager<FillTuple, Columns, FilterStates>(_filters_manager, _sort_manager, _get_column_comparer, f => _rows.filter = f, c => _rows.comparer = c, _rows.reset, FillsWindow.window_type_name);
+         // rows
+         _rows_manager = DIYGridRowsManager.create(FillsWindow.window_type_name, Columns.FillKey, col_tups, col_tups.WrapSelector(t => (t.col, t.key)), _get_column_comparer, fs => fs.build_predicate());
         // grid settings
         grid_settings_manager = new SimpleGridSettingsManager<Row>(columns, new Dictionary<string, GridColumnSettingsFeatureFlags> { }, rows);
         // this will initialize the immutable properties that correspond to the col_settings_flags above (e.g. Bid/Ask font_color_override, etc.)
         if (_settings_manager != null)
            grid_settings_manager.load_from(_settings_manager.current_settings());
-         //
+         var filter_src = Observable.FromEvent<Action<Func<FillTuple, bool>>, Func<FillTuple, bool>>(cb => _rows_manager.filter_changed += cb, cb => _rows_manager.filter_changed -= cb);
+         var comp_src = Observable.FromEvent<Action<IComparer<FillTuple>>, IComparer<FillTuple>>(cb => _rows_manager.comparer_changed += cb, cb => _rows_manager.comparer_changed -= cb);
+         TableUpdate<FillTuple, string> last_unfiltered_fills = TableUpdate<FillTuple, string>.mk_empty(FillTuple.key_fn);
+         var fills_buffer = Observable.Create<TableUpdate<FillTuple, string>>(o => {
+            // this is what .Cache() does, but is a little cheaper, since we know subscriptions and callbacks occur on the same thread (i.e., on this Dispatcher).
+            o.OnNext(last_unfiltered_fills.as_snapshot());
+            _unfiltered_fills_changed += o.OnNext;
+            return Disposable.Create(() => _unfiltered_fills_changed -= o.OnNext);
+         });
         _dispose = new CompositeDisposable(
            ObservableAutoWrapper.connect(col_tups, columns, ct => ct.col),
+            RXCollection.connect(rows, fills_buffer.Filter(filter_src, FillTuple.key_fn), comp_src, ft => new Row(ft, model), r => r.fill_tuple),
            fills_source.OnDispatcher().Subscribe(t => {
-               _rows.update(t);
+               last_unfiltered_fills = t;
               Set(ref _total_row_count, t.state.Count, nameof(total_row_count));
+               _unfiltered_fills_changed?.Invoke(t);
            }),
            state_obs.OnDispatcher().Subscribe(s => {
               if (s.grid != null && _settings_manager != null) {
@@ -116,16 +120,15 @@ namespace mbts.spark {
                  // Note: settings_manager in turn notifies grid_settings_manager of this update
                  _settings_manager.instance_settings = s.grid;
               }
-               var fs = s.filters ?? new FilterStates {
+               var fs = s.filters ?? new FillsFilterStates {
                  fill_time = new TimeFilterTuple(
                     TimeFilterMode.CMEOpen,
                     TimeTextTuple.FromDateTime(DateTime.Today),
                     TimeTextTuple.FromDateTime(DateTime.Today.AddDays(1)))
               };
-               rows_manager.on_settings(fs, s.sorting_criterion);
+               _rows_manager.on_settings(fs, s.sorting_criterion);
            }),
-            settings_manager == null ? Disposable.empty : settings_manager.subscribe_current().OnDispatcher().Subscribe(grid_settings_manager),
-            (fills_source as IConnectableObservable<TableUpdate<FillTuple, string>>)?.Connect() ?? Disposable.empty
+            settings_manager == null ? Disposable.empty : settings_manager.subscribe_current().OnDispatcher().Subscribe(grid_settings_manager)
         );
         // local methods
         void add_col<TFilter>(Columns col_key, string header, Func<Row, string> get_text, IDataGridColumnPersistentFilter<FillTuple, TFilter> filter, string filter_template, double width) =>
@@ -135,14 +138,17 @@ namespace mbts.spark {
               Width = width
            }, filter);
         void add_col_expl<TFilter>(Columns col_key, ColumnBase col, IDataGridColumnPersistentFilter<FillTuple, TFilter> filter) =>
-            col_tups.Add(col_key, DIYGridColumnData.create<FillTuple, Columns, FilterStates, TFilter>(col, filter, _get_column_comparer(col_key)));
+            col_tups.Add(col_key, DIYGridColumnData.create<FillTuple, Columns, FillsFilterStates, TFilter>(col, filter, _get_column_comparer(col_key)));
         // discrete-values-filter factories
         IDataGridColumnPersistentFilter<FillTuple, T[]> dv_filter<T>(IReadOnlyCollection<T> items, Func<FillTuple, T> get_row_val) => DiscreteValuesFilterVM.Create<FillTuple, T>(items, get_row_val);
         IDataGridColumnPersistentFilter<FillTuple, T[]> dv_filter_rx<T>(IObservable<IEnumerable<T>> items, Func<FillTuple, T> get_row_val) => DiscreteValuesFilterVM.Create<FillTuple, T>(items, get_row_val);
      }

+      // this event is used to forward updates from the main data to the filtered data that drives the rows, after resetting the total row count.
+      event Action<TableUpdate<FillTuple, string>> _unfiltered_fills_changed;
+
      public ObservableCollection<ColumnBase> columns { get; } = new ObservableCollection<ColumnBase>();
-      public ObservableCollection<Row> rows => _rows;
+      public ObservableCollection<Row> rows { get; } = new ObservableCollection<Row>();
      public int total_row_count => _total_row_count;

      public SimpleGridSettingsManager<Row> grid_settings_manager { get; }
@@ -154,26 +160,26 @@ namespace mbts.spark {
            return grid_settings_manager.create();
      }

+      public FillsFilterStates get_filters() =>
+         _rows_manager.get_filters();
+
      public IEnumerable<SortingCriteria> get_sorting_criterion() =>
-         _sort_manager.create();
+         _rows_manager.get_sorting_criterion();

      public void on_sorting(object sender, DIYGridSortingEventArgs e) =>
-         _sort_manager.on_sorting(e);
+         _rows_manager.on_sorting(e);

      static Columns _col_key(ColumnBase column) =>
         ((IKeyedColumn<Columns>)column).key;

-      public FilterStates get_filters() =>
-         _filters_manager.create();
-
-      static IObservable<TableUpdate<FillTuple, string>> _get_observable(IBus bus, OrdersModel model, StartupData state) {
+      static IObservable<TableUpdate<FillTuple, string>> _get_observable(IBus bus, OrdersModel model, FillsSettings state) {
         if (!state.orders.is_null_or_empty()) {
            var orders_hash = new HashSet<uint>(state.orders);
            return model.on_fill_tuples.Filter(f => orders_hash.Contains(f.fill.OrderKey));
         } else return model.on_fill_tuples;
      }

-      static IConnectableObservable<TableUpdate<FillTuple, string>> _get_observable(IBus bus, OrdersModel model, IObservable<StartupData> state) =>
+      static IObservable<TableUpdate<FillTuple, string>> _get_observable(IBus bus, OrdersModel model, IObservable<FillsSettings> state) =>
         state.SelectManyInSeries(s => _get_observable(bus, model, s));

      static IComparer<FillTuple> _get_column_comparer(Columns col) {
@@ -190,6 +196,7 @@ namespace mbts.spark {
            case Columns.SecurityKey: return wrap(ft => ft.fill.SecurityKey);
            case Columns.Side: return wrap_default(ft => ft.fill.Side);
            case Columns.Size: return wrap(ft => ft.fill.LastShares);
+            case Columns.Symbol: return wrap(ft => ft.security?.Symbol ?? string.Empty);
            case Columns.TimeInForce: return wrap_default(ft => ft.order?.time_in_force() ?? TimeInForce.Undefined);
            case Columns.User: return wrap(ft => ft.order?.user() ?? string.Empty);
            default: goto case Columns.FillTime;
@@ -212,8 +219,9 @@ namespace mbts.spark {
      }

      public class Row : SecurityRow, IEquatable<Row>, IRowVM {
+         public readonly FillTuple fill_tuple;
+
         readonly OrdersModel _model;
-         readonly FillTuple _fill_tuple;
         readonly FillImmutable _fill;
         readonly OrderRecordImmutable _order;
         Brush _badge_fill;
@@ -221,7 +229,7 @@ namespace mbts.spark {

         public Row(FillTuple fill_tuple, OrdersModel model) : 
            base(fill_tuple.security ?? SecurityDataHelper.Defaults.SecurityImmutable) {
-            _fill_tuple = fill_tuple;
+            this.fill_tuple = fill_tuple;
            _fill = fill_tuple.fill;
            _order = fill_tuple.order ?? OrderDataHelper.Defaults.OrderRecordImmutable;
            _model = model;
@@ -231,9 +239,9 @@ namespace mbts.spark {
         public DateTime fill_time => _fill.Timestamp.to_local_time();
         public TimeInForce time_in_force => _order.time_in_force();
         public OrderType order_type => _order.order_type();
-         public string display_name => OrderUtils.display_name(_order, _fill_tuple.algo);
+         public string display_name => OrderUtils.display_name(_order, fill_tuple.algo);
         public OrderMetadata order_metadata => _order_metadata ?? (_order_metadata = _model.factory.get_metadata(_order.Def.CustomDef.CustomCase));
-         public Brush badge_fill => _badge_fill ?? (_badge_fill = OrderUtils.badge_fill(_order, _fill_tuple.algo_meta, order_metadata));
+         public Brush badge_fill => _badge_fill ?? (_badge_fill = OrderUtils.badge_fill(fill_tuple.algo_meta, order_metadata));
         public string account { get; private set; }
         public string user => _order.user();
         public Venue exchange => security.Exchange;
@@ -6,6 +6,10 @@
  xmlns:c="clr-namespace:mbts.ui.controls"
  xmlns:usp="clr-namespace:mbts.ui.spark"
  xmlns:uspcv="clr-namespace:mbts.ui.spark.converters"
+  xmlns:cv="clr-namespace:mbts.ui.converters"
+  xmlns:u="clr-namespace:mbts.ui"
+  xmlns:api="clr-namespace:bts.api;assembly=spark_api"
+  xmlns:bts="clr-namespace:mbts.ui.controls"
  FocusManager.IsFocusScope="True"
  Background="{StaticResource CommonBackground}"
 >
@@ -15,6 +19,10 @@
        <ResourceDictionary Source="/view/Controls/DataGridEx/Filters/Views/FilterTemplates.xaml"/>
      </ResourceDictionary.MergedDictionaries>
      <uspcv:TickDisplayConverter x:Key="TickDisplayConverter"/>
+      <cv:ValueMap x:Key="SideToBrushConverter" Default="{u:Brush Transparent}">
+        <cv:KeyValue Key="{u:Enum Buy, Type=api:Side}" Value="{x:Static semi_transparent_bid_brush, MemberType={u:Nested u:BTSColors.MarketData}}"/>
+        <cv:KeyValue Key="{u:Enum Sell, Type=api:Side}" Value="{x:Static semi_transparent_ask_brush, MemberType={u:Nested u:BTSColors.MarketData}}"/>
+      </cv:ValueMap>
    </ResourceDictionary>
  </UserControl.Resources>
  <AdornerDecorator>
@@ -41,10 +49,10 @@
            CanExecute="{x:Static c:DIYGrid.DefaultRowActionCanExecute}"
          />
        </c:DIYGrid.CommandBindings>
-        <c:DIYGrid.RowTemplate>
-          <DataTemplate>
-            <usp:FillsRowView/>
-          </DataTemplate>
+        <c:DIYGrid.RowTemplate>
+          <DataTemplate>
+            <usp:FillsRowView Background="{Binding side, Converter={StaticResource SideToBrushConverter}}"/>
+          </DataTemplate>
        </c:DIYGrid.RowTemplate>
      </c:DIYGrid>
      <StatusBar Grid.Row="1" DockPanel.Dock="Bottom">
@@ -7,7 +7,23 @@ namespace mbts.ui.spark {
   /// Interaction logic for FillsView.xaml
   /// </summary>
   partial class FillsView : UserControl {
-      public enum Columns { FillTime, User, Account, Exchange, Security, TimeInForce, OrderType, Side, Price, Size, FillKind, FillKey, OrderKey, SecurityKey }
+      public enum Columns {
+         FillTime,
+         User,
+         Account,
+         Exchange,
+         Security,
+         Symbol,
+         TimeInForce,
+         OrderType,
+         Side,
+         Price,
+         Size,
+         FillKind,
+         FillKey,
+         OrderKey,
+         SecurityKey
+      }

      public FillsView() =>
         InitializeComponent();
@@ -1,10 +1,12 @@
 using bts;
 using bts.api;
 using bts.shell;
+using bts.shell.fills;
 using bts.spark;
 using mbts.persist;
 using mbts.ui;
 using mbts.ui.settings;
+using mbts.ui.shell;
 using mbts.ui.spark;
 using mbts.ui.utility;
 using mbts.utils;
@@ -13,21 +15,20 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Reactive.Linq;
 using System.Windows;
-using StartupData = bts.shell.FillsWindowFactory.StartupData;

 namespace mbts.spark {
-   class FillsWindow : SparkWindow<StartupData>, ISharedWindow {
+   class FillsWindow : SparkWindow<FillsSettings>, ISharedWindow {
      public const string window_type_name = "Fills";
      readonly AllowOnce _init_guard = new AllowOnce("Fills");
      readonly OrdersModel _orders_model;
      readonly IWindowSettingsManager<GridSettings> _settings_manager;
      FillsVM _vm;
      FillsView _view;
-      StartupData _state;
+      FillsSettings _state;
      IReadOnlyList<SparkCommand> _commands;
      IDisposable _subscriptions;

-      public FillsWindow(FillsWindowFactory factory, IBus bus, OrdersModel orders_model, StartupData state, WindowSettingsManager<GridSettings> settings_manager)
+      public FillsWindow(FillsWindowFactory factory, IBus bus, OrdersModel orders_model, FillsSettings state, WindowSettingsManager<GridSettings> settings_manager)
         : base("Fills", bus, factory, SparkCommands.ShowFills().icon) {
         _orders_model = orders_model;
         _state = state;
@@ -35,15 +36,15 @@ namespace mbts.spark {
         thread_id = config.Configuration.get<bts.config.MultiThreadedWindows>().fills ? "Fills" : null;
      }

-      event Action<FillsWindowFactory.StartupData> _state_changed;
+      event Action<FillsSettings> _state_changed;

      public override string window_type => window_type_name;
      public override UIElement Content => _view;
      public override IEnumerable<SparkCommand> Commands => _commands;

-      public override StartupData SaveState => _state = new StartupData(_state.orders, _vm.get_sorting_criterion().ToList(), _vm.get_filters(), _vm.get_grid_save_state());
+      public override FillsSettings SaveState => _state = new FillsSettings(_state.orders, _vm.get_sorting_criterion().ToList(), _vm.get_filters(), _vm.get_grid_save_state());
      public override double MinWidth =>
-         StartupData.DefaultGridSettings.columns.Sum(gcs => gcs.width)
+         FillsSettings.DefaultGridSettings.columns.Sum(gcs => gcs.width)
         + SPARK_MENU_COLLAPSED_WIDTH
         + LAUNCHER_BUTTON_BORDER_WIDTH
         + EXTRA_FOR_NO_HORIZONTAL_SCROLLBAR_WIDTH;
@@ -53,33 +54,32 @@ namespace mbts.spark {
      public void thread_init() {
         _init_guard.check_access();
         Log.notnull(_state);
-         var state_src = Observable.FromEvent<Action<FillsWindowFactory.StartupData>, FillsWindowFactory.StartupData>(cb => _state_changed += cb, cb => _state_changed -= cb).StartWith(_state);
+         var state_src = Observable.FromEvent<Action<FillsSettings>, FillsSettings>(cb => _state_changed += cb, cb => _state_changed -= cb).StartWith(_state);
         _vm = new FillsVM(_bus, _orders_model, state_src, _settings_manager);
         _view = new FillsView { DataContext = _vm };

         _commands = new List<SparkCommand> {
            // wrap the grid settings view factory in a dialogCommand here since the vm is destroyed/recreated when the security criteria changes
            SparkCommands.window_settings_command(new DialogCommand(() => {
-               var vm = new WindowSettingsDialogVM<GridSettings, SimpleGridSettingsVM>(
+               var vm = new ShellSettingsDialogVM<GridSettings, SimpleGridSettingsVM>(
                  _settings_manager, 
                  us => us.fills_grid, 
                  UserSettings.FileExtensions.GRID,
                  s => _vm.grid_settings_manager.create_vm(
                     // we need to get the most up to date GridSettings when launching b/c users may
                     // have changed some settings on the grid directly, like column widths.
-                     s.with(_vm.columns.Select( c => c.create())),
-                     this.observe_title()
+                     s.with(_vm.columns.Select(c => c.create()))
                  )
               );
-               // TODO: bind to main window's Title
-               var dialog = new SimpleGridSettingsDialog { Title = $"{window_type_name} Grid Settings", DataContext = vm };
+               vm.SubscribeDisposed(literal_title_source.OnDispatcher().Subscribe(t => vm.title = t));
+               var dialog = new ShellSettingsDialog { DataContext = vm };
               vm.RequestClose += (s, e) => WindowUtilities.force_close(dialog);
               return dialog;
            }))
         };
         _subscriptions = Disposable.Create(() =>
           _state_changed?.Invoke(
-                 _state = new StartupData(_state.orders,
+                 _state = new FillsSettings(_state.orders,
                    _vm.get_sorting_criterion().ToList(),
                    _vm.get_filters(),
                    _vm.grid_settings_manager.create()
@@ -1,5 +1,6 @@
 using bts.api;
 using bts.api.orderman;
+using bts.shell.fills;
 using mbts.persist;
 using mbts.spark;
 using mbts.spark.filters;
@@ -16,10 +17,31 @@ using static mbts.ui.controls.DIYGrid;
 using static mbts.ui.spark.FillsView;

 namespace bts.shell {
-   class FillsWindowFactory : ShellWindowFactory<FillsWindowFactory.StartupData> {
+   class FillsWindowFactory : ShellWindowFactory<FillsSettings> {
      readonly IBus _bus;
      readonly OrdersModel _orders_model;
      readonly UserSettingsHub _settings_hub;
+      /// Fills 'sorting-criterion' settings were compromised a while back (mid-late 2018).
+      /// The issue was that, when a column was sorted, its 'sort member path' was assigned to the SortingCriteria.col_name,
+      /// rather than the <see cref="Columns"/> enum/id string.
+      /// This dictionary serves as a reverse-lookup so the sort member path can be converted to the enum/id string.
+      static readonly IReadOnlyDictionary<string, Columns> _sort_member_to_id =
+         new Dictionary<string, Columns> {
+            { nameof(FillsVM.Row.account), Columns.Account },
+            { nameof(FillsVM.Row.exchange), Columns.Exchange },
+            { nameof(FillsVM.Row.fill_key), Columns.FillKey },
+            { nameof(FillsVM.Row.fill_kind), Columns.FillKind },
+            { nameof(FillsVM.Row.fill_time), Columns.FillTime },
+            { nameof(FillsVM.Row.order_key), Columns.OrderKey },
+            { nameof(FillsVM.Row.order_type), Columns.OrderType },
+            { nameof(FillsVM.Row.price), Columns.Price },
+            { nameof(FillsVM.Row.security), Columns.Security },
+            { nameof(FillsVM.Row.security_key), Columns.SecurityKey },
+            { nameof(FillsVM.Row.side), Columns.Side },
+            { nameof(FillsVM.Row.size), Columns.Size },
+            { nameof(FillsVM.Row.time_in_force), Columns.TimeInForce },
+            { nameof(FillsVM.Row.user), Columns.User }
+         };

      public FillsWindowFactory(TradingShellModule module, IBus bus, UserSettingsHub settings_hub, OrdersModel orders_model)
         : base(module, "Fills") {
@@ -31,175 +53,19 @@ namespace bts.shell {

      public static string col_id(Columns col) => col.ToString();

-      public override Task<IShellWindow> load(StartupData state) =>
+      public override Task<IShellWindow> load(FillsSettings state) =>
        Task.FromResult(_create(state));

-      public async void show(StartupData state) =>
+      public async void show(FillsSettings state) =>
         _bus.post(SparkTags.ShowWindow, await load(state));

-      IShellWindow _create(StartupData state) {
+      IShellWindow _create(FillsSettings state) {
+         GridSettingsHelper.normalize_sorting_criterion(state.sorting_criterion, _sort_member_to_id);
         var settings_manager = new WindowSettingsManager<GridSettings>(_settings_hub,
            state.grid,
            get: us => us.fills_grid,
            set: (us, gs) => us.with(provided_fills_gridsettings: gs));
         return new FillsWindow(this, _bus, _orders_model, state, settings_manager);
      }
-
-      [ProtoContract]
-      public class StartupData {
-         public const int Version = 1;
-
-         [ProtoMember(1)]
-         public uint[] orders;
-         [ProtoMember(2)]
-         List<SortingCriteria> _sorting_criteria;
-         [ProtoMember(3)]
-         public FilterStates filters;
-         [ProtoMember(4)]
-         public GridSettings grid;
-
-         public StartupData() { }
-         public StartupData(uint[] orders) : this(orders, null, null) { }
-         public StartupData(FilterStates filters) : this(null, null, filters) { }
-         public StartupData(uint[] orders, List<SortingCriteria> sorting_criteria, FilterStates filters, GridSettings grid = default) {
-            this.orders = orders;
-            this._sorting_criteria = sorting_criteria;
-            this.filters = filters;
-            this.grid = grid;
-         }
-
-         public static GridSettings DefaultGridSettings => GridSettings.Default.with(DefaultColumns.all, DefaultColumns.default_sorting_criterion);
-         public static GridSettings MiniGridSettings => GridSettings.Default.with(DefaultColumns.Mini.all, DefaultColumns.Mini.sorting_criterion);
-         public IReadOnlyList<SortingCriteria> sorting_criterion => _sorting_criteria ?? (_sorting_criteria = DefaultColumns.default_sorting_criterion.ToList());
-         public static StartupData Default() =>
-            new StartupData(null, null, new FilterStates(), null);
-
-         static class DefaultColumns {
-            public static GridColumnSettings security => new GridColumnSettings(col_id(Columns.Security), DefaultColumnHeaders.Security, width: DefaultColumnWidths.Security);
-            public static GridColumnSettings fill_time => new GridColumnSettings(col_id(Columns.FillTime), DefaultColumnHeaders.FillTime, width: DefaultColumnWidths.Time);
-            public static GridColumnSettings user => new GridColumnSettings(col_id(Columns.User), DefaultColumnHeaders.User, width: DefaultColumnWidths.User);
-            public static GridColumnSettings account => new GridColumnSettings(col_id(Columns.Account), DefaultColumnHeaders.Account, width: DefaultColumnWidths.Account);
-            public static GridColumnSettings exchange => new GridColumnSettings(col_id(Columns.Exchange), DefaultColumnHeaders.Exchange, width: DefaultColumnWidths.Exchange);
-            public static GridColumnSettings time_in_force => new GridColumnSettings(col_id(Columns.TimeInForce), DefaultColumnHeaders.TimeInForce, width: DefaultColumnWidths.TimeInForce);
-            public static GridColumnSettings order_type => new GridColumnSettings(col_id(Columns.OrderType), DefaultColumnHeaders.OrderType, width: DefaultColumnWidths.OrderType);
-            public static GridColumnSettings side => new GridColumnSettings(col_id(Columns.Side), DefaultColumnHeaders.Side, width: DefaultColumnWidths.Side);
-            public static GridColumnSettings quantity => new GridColumnSettings(col_id(Columns.Size), DefaultColumnHeaders.Size, width: DefaultColumnWidths.Size, horizontal_alignment: System.Windows.HorizontalAlignment.Right);
-            public static GridColumnSettings price => new GridColumnSettings(col_id(Columns.Price), DefaultColumnHeaders.Price, width: DefaultColumnWidths.Price, horizontal_alignment: System.Windows.HorizontalAlignment.Right);
-            public static GridColumnSettings fill_kind => new GridColumnSettings(col_id(Columns.FillKind), DefaultColumnHeaders.FillKind, width: DefaultColumnWidths.FillKind);
-            public static GridColumnSettings fill_key => new GridColumnSettings(col_id(Columns.FillKey), DefaultColumnHeaders.FillKey, width: DefaultColumnWidths.FillKey);
-            public static GridColumnSettings order_key => new GridColumnSettings(col_id(Columns.OrderKey), DefaultColumnHeaders.OrderKey, width: DefaultColumnWidths.OrderKey);
-            public static GridColumnSettings security_key => new GridColumnSettings(col_id(Columns.SecurityKey), DefaultColumnHeaders.SecurityKey, is_visible: false, width: DefaultColumnWidths.SecurityKey);
-            public static IEnumerable<SortingCriteria> default_sorting_criterion {
-               get {
-                  yield return new SortingCriteria(fill_time.id, false);
-               }
-            }
-            
-            public static IEnumerable<GridColumnSettings> all {
-               get {
-                  yield return security;
-                  yield return fill_time;
-                  yield return user;
-                  yield return account;
-                  yield return exchange;
-                  yield return time_in_force;
-                  yield return order_type;
-                  yield return side;
-                  yield return quantity;
-                  yield return price;
-                  yield return fill_kind;
-                  yield return fill_key;
-                  yield return order_key;
-                  yield return security_key;
-               }
-            }
-
-            public static class Mini {
-               static readonly IReadOnlyDictionary<Columns, (bool is_visible, double? width_override)> _mini_cols_data =
-                  new Dictionary<Columns, (bool is_visible, double? width_override)> {
-                     { Columns.Security, (true, null) },
-                     { Columns.FillTime, (true, ShortColumnWidths.Time) },
-                     { Columns.OrderType, (true, ShortColumnWidths.OrderType) },
-                     { Columns.Side, (true, ShortColumnWidths.Side) },
-                     { Columns.Size, (true, ShortColumnWidths.Size) },
-                     { Columns.Price, (true, ShortColumnWidths.Price) },
-                  };
-
-               public static IEnumerable<GridColumnSettings> all => DefaultColumns.all.Select(_convert);
-               public static IEnumerable<SortingCriteria> sorting_criterion => default_sorting_criterion.Where(c => _try_get_data(c.col_name, out (bool is_visible, double? _) d) && d.is_visible);
-
-               static bool _try_get_data(string id_str, out (bool is_visible, double? width_override) data) {
-                  if (Enum.TryParse(id_str, out Columns k) && _mini_cols_data.TryGetValue(k, out data))
-                     return true;
-                  data = default;
-                  return false;
-               }
-
-               static GridColumnSettings _convert(GridColumnSettings default_col) =>
-                  _try_get_data(default_col.id, out (bool is_visible, double? width_override) d) ?
-                     default_col.with(is_visible: d.is_visible, width: d.width_override) :
-                     default_col.with(is_visible: false);
-            }
-         }
-      }
-
-      [ProtoContract]
-      public class FilterStates {
-         [ProtoMember(1)]
-         [DIYGridColumnID(nameof(Columns.FillTime))]
-         public TimeFilterTuple fill_time { get; set; }
-
-         [ProtoMember(2)]
-         [DIYGridColumnID(nameof(Columns.TimeInForce))]
-         public TimeInForce[] time_in_force { get; set; }
-
-         [ProtoMember(3)]
-         [DIYGridColumnID(nameof(Columns.OrderType))]
-         public CustomOrderDefinition.CustomOneofCase[] order_type { get; set; }
-
-         [ProtoMember(4)]
-         [DIYGridColumnID(nameof(Columns.Account))]
-         public string[] account { get; set; }
-
-         [ProtoMember(5)]
-         [DIYGridColumnID(nameof(Columns.User))]
-         public string[] user { get; set; }
-
-         [ProtoMember(6)]
-         [DIYGridColumnID(nameof(Columns.Exchange))]
-         public Venue[] exchange { get; set; }
-
-         [ProtoMember(7)]
-         [DIYGridColumnID(nameof(Columns.Security))]
-         public SecurityCriteria security { get; set; }
-
-         [ProtoMember(8)]
-         [DIYGridColumnID(nameof(Columns.Side))]
-         public Side[] side { get; set; }
-
-         [ProtoMember(9)]
-         [DIYGridColumnID(nameof(Columns.Price))]
-         public DoubleMinMaxState price { get; set; }
-
-         [ProtoMember(10)]
-         [DIYGridColumnID(nameof(Columns.Size))]
-         public DoubleMinMaxState size { get; set; }
-
-         [ProtoMember(11)]
-         [DIYGridColumnID(nameof(Columns.FillKey))]
-         public string fill_key { get; set; }
-
-         [ProtoMember(12)]
-         [DIYGridColumnID(nameof(Columns.OrderKey))]
-         public string order_key { get; set; }
-
-         [ProtoMember(13)]
-         [DIYGridColumnID(nameof(Columns.SecurityKey))]
-         public string security_key { get; set; }
-
-         [ProtoMember(14)]
-         [DIYGridColumnID(nameof(Columns.FillKind))]
-         public Fill.Types.FillKind[] fill_kind { get; set; }
-      }
   }
 }
@@ -0,0 +1,100 @@
+using bts.api;
+using bts.api.orderman;
+using mbts.spark;
+using mbts.spark.filters;
+using mbts.ui;
+using mbts.ui.controls;
+using ProtoBuf;
+using System;
+using Columns = mbts.ui.spark.FillsView.Columns;
+
+namespace bts.shell.fills {
+   [ProtoContract]
+   class FillsFilterStates {
+      [ProtoMember(1)]
+      [DIYGridColumnID(nameof(Columns.FillTime))]
+      public TimeFilterTuple fill_time { get; set; }
+
+      [ProtoMember(2)]
+      [DIYGridColumnID(nameof(Columns.TimeInForce))]
+      public TimeInForce[] time_in_force { get; set; }
+
+      [ProtoMember(3)]
+      [DIYGridColumnID(nameof(Columns.OrderType))]
+      public CustomOrderDefinition.CustomOneofCase[] order_type { get; set; }
+
+      [ProtoMember(4)]
+      [DIYGridColumnID(nameof(Columns.Account))]
+      public string[] account { get; set; }
+
+      [ProtoMember(5)]
+      [DIYGridColumnID(nameof(Columns.User))]
+      public string[] user { get; set; }
+
+      [ProtoMember(6)]
+      [DIYGridColumnID(nameof(Columns.Exchange))]
+      public Venue[] exchange { get; set; }
+
+      [ProtoMember(7)]
+      [DIYGridColumnID(nameof(Columns.Security))]
+      public SecurityCriteria security { get; set; }
+
+      [ProtoMember(8)]
+      [DIYGridColumnID(nameof(Columns.Side))]
+      public Side[] side { get; set; }
+
+      [ProtoMember(9)]
+      [DIYGridColumnID(nameof(Columns.Price))]
+      public DoubleMinMaxState price { get; set; }
+
+      [ProtoMember(10)]
+      [DIYGridColumnID(nameof(Columns.Size))]
+      public DoubleMinMaxState size { get; set; }
+
+      [ProtoMember(11)]
+      [DIYGridColumnID(nameof(Columns.FillKey))]
+      public string fill_key { get; set; }
+
+      [ProtoMember(12)]
+      [DIYGridColumnID(nameof(Columns.OrderKey))]
+      public string order_key { get; set; }
+
+      [ProtoMember(13)]
+      [DIYGridColumnID(nameof(Columns.SecurityKey))]
+      public string security_key { get; set; }
+
+      [ProtoMember(14)]
+      [DIYGridColumnID(nameof(Columns.FillKind))]
+      public Fill.Types.FillKind[] fill_kind { get; set; }
+
+      [ProtoMember(15)]
+      [DIYGridColumnID(nameof(Columns.Symbol))]
+      public string[] symbol { get; set; }
+   }
+
+   static class FillsFilterStatesExtensions {
+      public static Func<FillTuple, bool> build_predicate(this FillsFilterStates fs) {
+         var pb = new ColumnPredicateBuilder<FillTuple>();
+         // fill time
+         pb.add_time_filter(fs.fill_time, ft => ft.fill_time());
+         // security
+         pb.add_security_criteria(fs.security, ft => ft.security);
+         // regex
+         pb.add_regex(fs.fill_key, ft => ft.fill.FillKey);
+         pb.add_regex(fs.order_key, ft => ft.order_key().ToString());
+         // discrete values
+         pb.add_discrete_values(fs.user, ft => ft.user());
+         pb.add_discrete_values(fs.account, ft => ft.account);
+         pb.add_discrete_values(fs.exchange, ft => ft.exchange());
+         pb.add_discrete_values(fs.time_in_force, ft => ft.time_in_force());
+         pb.add_discrete_values(fs.order_type, ft => ft.order_type());
+         pb.add_discrete_values(fs.side, ft => ft.fill.Side);
+         pb.add_discrete_values(fs.fill_kind, ft => ft.fill.FillKind);
+         pb.add_discrete_values(fs.symbol, ft => ft.security?.Symbol ?? string.Empty);
+         // numeric
+         pb.add_numeric(fs.size, ft => ft.fill.LastShares);
+         pb.add_numeric(fs.price, ft => ft.fill.LastPrice);
+         return pb.to_predicate();
+      }
+   }
+}
@@ -0,0 +1,111 @@
+using mbts.ui;
+using mbts.ui.settings;
+using ProtoBuf;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using static bts.shell.FillsWindowFactory;
+using static mbts.ui.controls.DIYGrid;
+using Columns = mbts.ui.spark.FillsView.Columns;
+
+namespace bts.shell.fills {
+   [ProtoContract]
+   class FillsSettings {
+      public const int Version = 1;
+
+      [ProtoMember(1)]
+      public uint[] orders;
+      [ProtoMember(2)]
+      List<SortingCriteria> _sorting_criteria;
+      [ProtoMember(3)]
+      public FillsFilterStates filters;
+      [ProtoMember(4)]
+      public GridSettings grid;
+
+      public FillsSettings() { }
+      public FillsSettings(uint[] orders) : this(orders, null, null) { }
+      public FillsSettings(FillsFilterStates filters) : this(null, null, filters) { }
+      public FillsSettings(uint[] orders, List<SortingCriteria> sorting_criteria, FillsFilterStates filters, GridSettings grid = default) {
+         this.orders = orders;
+         this._sorting_criteria = sorting_criteria;
+         this.filters = filters;
+         this.grid = grid;
+      }
+
+      public static GridSettings DefaultGridSettings => GridSettings.Default.with(DefaultColumns.all, DefaultColumns.default_sorting_criterion);
+      public static GridSettings MiniGridSettings => GridSettings.Default.with(DefaultColumns.Mini.all, DefaultColumns.Mini.sorting_criterion);
+      public IReadOnlyList<SortingCriteria> sorting_criterion => _sorting_criteria ?? (_sorting_criteria = DefaultColumns.default_sorting_criterion.ToList());
+      public static FillsSettings Default() =>
+         new FillsSettings(null, null, new FillsFilterStates(), null);
+
+      static class DefaultColumns {
+         public static GridColumnSettings security => new GridColumnSettings(col_id(Columns.Security), DefaultColumnHeaders.Security, width: DefaultColumnWidths.Security);
+         public static GridColumnSettings symbol => new GridColumnSettings(col_id(Columns.Symbol), DefaultColumnHeaders.Symbol, width: DefaultColumnWidths.Symbol);
+         public static GridColumnSettings fill_time => new GridColumnSettings(col_id(Columns.FillTime), DefaultColumnHeaders.FillTime, width: DefaultColumnWidths.Time);
+         public static GridColumnSettings user => new GridColumnSettings(col_id(Columns.User), DefaultColumnHeaders.User, width: DefaultColumnWidths.User);
+         public static GridColumnSettings account => new GridColumnSettings(col_id(Columns.Account), DefaultColumnHeaders.Account, width: DefaultColumnWidths.Account);
+         public static GridColumnSettings exchange => new GridColumnSettings(col_id(Columns.Exchange), DefaultColumnHeaders.Exchange, width: DefaultColumnWidths.Exchange);
+         public static GridColumnSettings time_in_force => new GridColumnSettings(col_id(Columns.TimeInForce), DefaultColumnHeaders.TimeInForce, width: DefaultColumnWidths.TimeInForce);
+         public static GridColumnSettings order_type => new GridColumnSettings(col_id(Columns.OrderType), DefaultColumnHeaders.OrderType, width: DefaultColumnWidths.OrderType);
+         public static GridColumnSettings side => new GridColumnSettings(col_id(Columns.Side), DefaultColumnHeaders.Side, width: DefaultColumnWidths.Side);
+         public static GridColumnSettings quantity => new GridColumnSettings(col_id(Columns.Size), DefaultColumnHeaders.Size, width: DefaultColumnWidths.Size, horizontal_alignment: System.Windows.HorizontalAlignment.Right);
+         public static GridColumnSettings price => new GridColumnSettings(col_id(Columns.Price), DefaultColumnHeaders.Price, width: DefaultColumnWidths.Price, horizontal_alignment: System.Windows.HorizontalAlignment.Right);
+         public static GridColumnSettings fill_kind => new GridColumnSettings(col_id(Columns.FillKind), DefaultColumnHeaders.FillKind, width: DefaultColumnWidths.FillKind);
+         public static GridColumnSettings fill_key => new GridColumnSettings(col_id(Columns.FillKey), DefaultColumnHeaders.FillKey, width: DefaultColumnWidths.FillKey);
+         public static GridColumnSettings order_key => new GridColumnSettings(col_id(Columns.OrderKey), DefaultColumnHeaders.OrderKey, width: DefaultColumnWidths.OrderKey);
+         public static GridColumnSettings security_key => new GridColumnSettings(col_id(Columns.SecurityKey), DefaultColumnHeaders.SecurityKey, is_visible: false, width: DefaultColumnWidths.SecurityKey);
+         public static IEnumerable<SortingCriteria> default_sorting_criterion {
+            get {
+               yield return new SortingCriteria(fill_time.id, false);
+            }
+         }
+
+         public static IEnumerable<GridColumnSettings> all {
+            get {
+               yield return security;
+               yield return symbol;
+               yield return fill_time;
+               yield return user;
+               yield return account;
+               yield return exchange;
+               yield return time_in_force;
+               yield return order_type;
+               yield return side;
+               yield return quantity;
+               yield return price;
+               yield return fill_kind;
+               yield return fill_key;
+               yield return order_key;
+               yield return security_key;
+            }
+         }
+
+         public static class Mini {
+            static readonly IReadOnlyDictionary<Columns, (bool is_visible, double? width_override)> _mini_cols_data =
+               new Dictionary<Columns, (bool is_visible, double? width_override)> {
+                     { Columns.Security, (true, null) },
+                     { Columns.FillTime, (true, ShortColumnWidths.Time) },
+                     { Columns.OrderType, (true, ShortColumnWidths.OrderType) },
+                     { Columns.Side, (true, ShortColumnWidths.Side) },
+                     { Columns.Size, (true, ShortColumnWidths.Size) },
+                     { Columns.Price, (true, ShortColumnWidths.Price) },
+               };
+
+            public static IEnumerable<GridColumnSettings> all => DefaultColumns.all.Select(_convert);
+            public static IEnumerable<SortingCriteria> sorting_criterion => default_sorting_criterion.Where(c => _try_get_data(c.col_name, out (bool is_visible, double? _) d) && d.is_visible);
+
+            static bool _try_get_data(string id_str, out (bool is_visible, double? width_override) data) {
+               if (Enum.TryParse(id_str, out Columns k) && _mini_cols_data.TryGetValue(k, out data))
+                  return true;
+               data = default;
+               return false;
+            }
+
+            static GridColumnSettings _convert(GridColumnSettings default_col) =>
+               _try_get_data(default_col.id, out (bool is_visible, double? width_override) d) ?
+                  default_col.with(is_visible: d.is_visible, width: d.width_override) :
+                  default_col.with(is_visible: false);
+         }
+      }
+   }
+}
@@ -2,23 +2,23 @@
 using bts.api;
 using bts.api.core;
 using bts.api.orderman;
-using bts.collections;
+using bts.md;
 using mbts.co2;
 using System;
-using System.Collections.Generic;
-using System.Reactive.Linq;
 using System.Threading.Tasks;

 namespace mbts.spark {
   class LadderModel {
      readonly OrdersModel _order_gateway;

-      public LadderModel(SecurityMD source, OrdersModel ordergw, Func<OrderSecurity, bool> order_filter = null) {
+      public LadderModel(SecurityMD source, OrdersModel ordergw, MBOService mbo, Func<OrderSecurity, bool> order_filter = null) {
         security_md = source;
         _order_gateway = ordergw;
-         orders = ordergw.on_security_working_orders(source.security.Id);
-         if (order_filter != null)
-            orders = orders.Filter(o => order_filter(new OrderSecurity(source.security, o)), o => o.Key);
+         orders = ordergw.on_security_working_orders_with_piq(source.security.Id);
+         this.mbo_service = mbo;
+         if (order_filter != null) {
+            orders = orders.Filter(order_filter, o => o.order.Key);
+		 }
      }

      public enum CancelType { All, Bids, Asks }
@@ -27,7 +27,9 @@ namespace mbts.spark {
      public SecurityImmutable security => security_md.security;
      public MDConsumerHandle md => security_md.md;
      public OrdersModel order_gateway => _order_gateway;
-      public IObservable<TableUpdate<OrderRecordImmutable, uint>> orders { get; }
+      public IObservable<TableUpdate<OrderSecurity, uint>> orders { get; }
+
+      public MBOService mbo_service { get; }

      public Task cancel_orders(CancelType ct) {
         switch (ct) {
@@ -9,6 +9,7 @@ using bts.proto;
 using mbts.ui.spark;
 using System.Collections.Generic;
 using System.ComponentModel;
+using mbts.ui.settings;

 namespace mbts.spark {
   // IMPORTANT: BE SURE TO ADD ANY NEW PROPERTIES TO THE EQUALS FUNCTION!
@@ -119,7 +120,8 @@ namespace mbts.spark {
               buy = new HistogramBarAnimation { bars = new ColorShowProto((uint)BTSColors.MarketData.bid, false) },
               sell = new HistogramBarAnimation { bars = new ColorShowProto((uint)BTSColors.MarketData.ask, false) },
               passive = new HistogramBarAnimation { bars = new ColorShowProto((uint)BTSColors.LadderSpecial.passive_volume_bar, false) },
-               total = new HistogramBarAnimation { bars = new ColorShowProto((uint)BTSColors.LadderSpecial.total_volume_bar), show_numbers = true }
+               total = new HistogramBarAnimation { bars = new ColorShowProto((uint)BTSColors.LadderSpecial.total_volume_bar), show_numbers = true },
+               show_ltq = false
            };
         }
      }
@@ -134,6 +136,8 @@ namespace mbts.spark {
      public HistogramBarAnimation passive { get; set; }
      [ProtoMember(5)]
      public HistogramBarAnimation total{ get; set; }
+      [ProtoMember(6)]
+      public bool show_ltq { get; set; }

      public bool Equals(VolumeColumnSettings other) =>
         other != null &&
@@ -141,7 +145,8 @@ namespace mbts.spark {
         buy.safe_equals(other.buy) &&
         sell.safe_equals(other.sell) &&
         passive.safe_equals(other.passive) &&
-         total.safe_equals(other.total);
+         total.safe_equals(other.total) &&
+         show_ltq.Equals(other.show_ltq);

      public override bool Equals(object obj) => Equals(obj as VolumeColumnSettings);

@@ -151,7 +156,8 @@ namespace mbts.spark {
            buy.GetHashCode(),
            sell.GetHashCode(),
            passive.GetHashCode(),
-            total.GetHashCode());
+            total.GetHashCode(),
+            show_ltq.GetHashCode());
   }

   [ProtoContract]
@@ -215,6 +221,23 @@ namespace mbts.spark {
      public static bool operator !=(LadderFavoriteAlgosSettings a, LadderFavoriteAlgosSettings b) => !a.Equals(b);
   }

+   [ProtoContract]
+   readonly struct LadderMiniOrderBookSettings : IEquatable<LadderMiniOrderBookSettings> {
+      // this is the only member now, but more may be added later (that is why a GridSettings member wasn't added directly to LadderSettings).
+      [ProtoMember(1)]
+      public readonly GridSettings value;
+
+      public LadderMiniOrderBookSettings(GridSettings value) =>
+         this.value = value;
+
+      public bool Equals(LadderMiniOrderBookSettings other) => value == null ? other.value == null : value.Equals(other.value);
+      public override bool Equals(object obj) => obj is LadderMiniOrderBookSettings other && Equals(other);
+      public override int GetHashCode() => value.GetHashCode();
+
+      public static bool operator ==(LadderMiniOrderBookSettings a, LadderMiniOrderBookSettings b) => a.Equals(b);
+      public static bool operator !=(LadderMiniOrderBookSettings a, LadderMiniOrderBookSettings b) => !a.Equals(b);
+   }
+
   // IMPORTANT: BE SURE TO ADD ANY NEW PROPERTIES TO THE EQUALS FUNCTION!
   // 1 important reason at this time:
   // From the settings dialog, default settings will only be persisted when they are NOT EQUAL to the current default settings.
@@ -223,10 +246,12 @@ namespace mbts.spark {
   class LadderSettings : IEquatable<LadderSettings> {
      const double _default_order_entry_panel_width = 110.0;
      const double _default_zoom_factor = 1.0;
+      const bool _default_show_warn_on_cross = true;

      // Default proto constructor
      // Added this so that when clients upgrade to a version with new settings,
      // the default values are applied correctly; thx to John for this tip
+      /// TODO: all default values should be consts, because they must be referenced in two places (in the default constructor, and the <see cref="DefaultValueAttribute"/>)
      public LadderSettings() {
         day_visible = true;
         high_visible = true;
@@ -238,6 +263,7 @@ namespace mbts.spark {
         tif_visible = true;
         order_type_visible = true;
         account_position_visible = true;
+         day_position_visible = true;
         size_presets_visible = true;
         cancel_buys_visible = true;
         cancel_sells_visible = true;
@@ -248,6 +274,7 @@ namespace mbts.spark {
         zoom_factor = _default_zoom_factor;
         use_defaults = true;
         favorite_algos = new LadderFavoriteAlgosSettings(null, 2);
+         show_warn_on_cross = _default_show_warn_on_cross;
      }

      public static LadderSettings Default {
@@ -279,8 +306,8 @@ namespace mbts.spark {
               volume_column = VolumeColumnSettings.Default,
               calculator_buttons = new[] { 1, 5, 10, 25, 50, 100 },
               scroll_bar_visible = false,
-               default_order_type = CustomOrderDefinition.CustomOneofCase.Limit,
               default_time_in_force = TimeInForce.Day,
+               default_algo = new AlgoID(CustomOrderDefinition.CustomOneofCase.Limit),
               animate_recenter = true,
               badge_style = BadgeStyle.Normal,
               bid_break_line = new LadderMarketBreakLine { color = 0, show = true },
@@ -301,6 +328,7 @@ namespace mbts.spark {
               tif_visible = true,
               order_type_visible = true,
               account_position_visible = true,
+               day_position_visible = true,
               size_presets_visible = true,
               cancel_buys_visible = true,
               cancel_sells_visible = true,
@@ -311,6 +339,7 @@ namespace mbts.spark {
               zoom_slider_visible = false,
               zoom_factor = _default_zoom_factor,
               net_change = NetChangeTerms.None,
+               mini_ob = new LadderMiniOrderBookSettings(bts.shell.orderbook.OrderBookStartupData.default_mini_grid.general),
            };
            rv.row_height = LadderRender.measure_row_height(rv);
            return rv;
@@ -319,7 +348,15 @@ namespace mbts.spark {

      public enum BadgeStyle { Normal, Alternate }

-      public enum NetChangeTerms { None, Dollars, Ticks }
+      // TODO: rename to PriceDisplayFormat (today is merge monday, since this isn't a functional change, it is not worth the potential merge headaches right now)
+      public enum NetChangeTerms {
+         [Description("Standard Ticks")]
+         None,
+         [Description("Net Change Dollars")]
+         Dollars,
+         [Description("Net Change Ticks")]
+         Ticks
+      }

      [ProtoMember(1)]
      public double row_height { get; set; }
@@ -346,6 +383,10 @@ namespace mbts.spark {
      public bool scroll_bar_visible { get; set; }
      // USED [ProtoMember(11)]
      // USED [ProtoMember(12)]
+      [ProtoMember(51)]
+      public uint default_account { get; set; }
+      [ProtoMember(52)]
+      public AlgoID default_algo { get; set; }
      [ProtoMember(13)]
      public CustomOrderDefinition.CustomOneofCase default_order_type { get; set; }
      [ProtoMember(14)]
@@ -356,6 +397,8 @@ namespace mbts.spark {
      public bool animate_recenter { get; set; } = true;
      [ProtoMember(17)]
      public BadgeStyle badge_style { get; set; }
+      [ProtoMember(53)]
+      public bool auto_clear { get; set; }

      [ProtoMember(18)]
      public LadderMarketBreakLine bid_break_line { get; set; }
@@ -397,6 +440,8 @@ namespace mbts.spark {
      public bool order_type_visible { get; set; }
      [ProtoMember(36), DefaultValue(true)]
      public bool account_position_visible { get; set; }
+      [ProtoMember(50), DefaultValue(true)]
+      public bool day_position_visible { get; set; }
      [ProtoMember(37), DefaultValue(true)]
      public bool size_presets_visible { get; set; }
      [ProtoMember(38), DefaultValue(true)]
@@ -436,6 +481,47 @@ namespace mbts.spark {
         get => _piq_column ?? (_piq_column = LadderSettings.Default.piq_column);
         set => _piq_column = value;
      }
+      [ProtoMember(54), DefaultValue(_default_show_warn_on_cross)]
+      public bool show_warn_on_cross { get; set; }
+
+      [ProtoMember(55)]
+      public LadderMiniOrderBookSettings mini_ob { get; set; }
+
+      public void sanitize() =>
+         sanitize(this);
+
+      // if there are new props, make sure they are not null, invalid, etc.
+      public static LadderSettings sanitize(LadderSettings s) {
+         if (s == null)
+            return null;
+         // these MarketBreakLines are new settings props, ensure they are not null
+         if (s.bid_break_line == null)
+            s.bid_break_line = Default.bid_break_line;
+         if (s.ask_break_line == null)
+            s.ask_break_line = Default.ask_break_line;
+         if (s.mid_break_line == null)
+            s.mid_break_line = Default.mid_break_line;
+         if (s.session_low_line == null)
+            s.session_low_line = Default.session_low_line;
+         if (s.session_high_line == null)
+            s.session_high_line = Default.session_high_line;
+         if (s.session_range_fill == null)
+            s.session_range_fill = Default.session_range_fill;
+         if (s.volume_column == null)
+            s.volume_column = Default.volume_column;
+         if (s.size_display == null)
+            s.size_display = MarketSizeDisplay.get_default();
+         if (s.size_display.normal == null)
+            s.size_display = s.size_display.with(MarketSizeDisplay.get_default().normal);
+         if (s.mini_ob.value == null)
+            s.mini_ob = new LadderMiniOrderBookSettings(bts.shell.orderbook.OrderBookStartupData.default_mini_grid.general);
+#pragma warning disable CS0612 // Type or member is obsolete
+         if (s.mini_ob.value.sorting_criterion.Count == 0)
+            s.mini_ob = new LadderMiniOrderBookSettings(s.mini_ob.value.with(sorting_criterion: bts.shell.orderbook.OrderBookStartupData.default_mini_grid.general.sorting_criterion));
+#pragma warning restore CS0612 // Type or member is obsolete
+         s.row_height = LadderRender.measure_row_height(s);
+         return s;
+      }

      public bool Equals(LadderSettings other) =>
         other != null &&
@@ -449,11 +535,13 @@ namespace mbts.spark {
         piq_column.safe_equals(other.piq_column) &&
         calculator_buttons.safe_equals(other.calculator_buttons, (a, b) => a.SequenceEqual(b)) &&
         scroll_bar_visible == other.scroll_bar_visible &&
-         default_order_type == other.default_order_type &&
+         default_account == other.default_account &&
+         default_algo == other.default_algo &&
         default_time_in_force == other.default_time_in_force &&
         size == other.size &&
         animate_recenter == other.animate_recenter &&
         badge_style == other.badge_style &&
+         auto_clear == other.auto_clear &&
         bid_break_line.safe_equals(other.bid_break_line) &&
         ask_break_line.safe_equals(other.ask_break_line) &&
         mid_break_line.safe_equals(other.mid_break_line) &&
@@ -473,6 +561,7 @@ namespace mbts.spark {
         tif_visible == other.tif_visible &&
         order_type_visible == other.order_type_visible &&
         account_position_visible == other.account_position_visible &&
+         day_position_visible == other.day_position_visible &&
         size_presets_visible == other.size_presets_visible &&
         cancel_buys_visible == other.cancel_buys_visible &&
         cancel_sells_visible == other.cancel_sells_visible &&
@@ -484,10 +573,13 @@ namespace mbts.spark {
         zoom_factor == other.zoom_factor &&
         use_defaults == other.use_defaults &&
         favorite_algos == other.favorite_algos &&
-         net_change == other.net_change;
+         net_change == other.net_change &&
+         show_warn_on_cross == other.show_warn_on_cross &&
+         mini_ob == other.mini_ob;

      public override bool Equals(object obj) => Equals(obj as LadderSettings);

+      // TODO: remove mutable props from hash logic (or conversely, make them immutable).
      public override int GetHashCode() =>
         EqualityComparer.aggregate_hash(
            row_height.GetHashCode(),
@@ -500,7 +592,6 @@ namespace mbts.spark {
            EqualityComparer.safe_get_hash_code(piq_column),
            EqualityComparer.safe_get_hash_code(calculator_buttons),
            scroll_bar_visible.GetHashCode(),
-            default_order_type.GetHashCode(),
            default_time_in_force.GetHashCode(),
            size.GetHashCode(),
            animate_recenter.GetHashCode(),
@@ -535,7 +626,8 @@ namespace mbts.spark {
            zoom_factor.GetHashCode(),
            use_defaults.GetHashCode(),
            favorite_algos.GetHashCode(),
-            net_change.GetHashCode());
+            net_change.GetHashCode(),
+            show_warn_on_cross.GetHashCode());

      public struct WindowSpecifics {
         public readonly double order_entry_panel_width, zoom_factor;
@@ -1,15 +1,20 @@
 using bts.api;
+using bts.md;
 using mbts;
 using mbts.config;
 using mbts.persist;
 using mbts.spark;
+using mbts.spark.utilities;
 using mbts.ui;
+using mbts.ui.shell;
 using mbts.ui.spark;
 using ProtoBuf;
 using System;
 using System.Collections.Generic;
+using System.Collections.Immutable;
 using System.Linq;
 using System.Reactive.Linq;
+using System.Reactive.Subjects;
 using System.Threading;
 using System.Threading.Tasks;
 using System.Windows;
@@ -21,17 +26,26 @@ namespace bts.shell {
      readonly LadderConfig _ladder_conf;
      readonly IBus _bus;
      readonly IWindowManager _wm;
+      readonly MBOService _mbo;
      readonly UserSettingsHub _settings_hub;
      readonly OrdersModel _orders_model;
      IReadOnlyDictionary<uint, SecurityMD> _securities = new Dictionary<uint, SecurityMD>();

-      public LadderWindowFactory(IShellModule owner, IBus bus, IWindowManager wm, UserSettingsHub settings_hub, OrdersModel orders_model)
+      public LadderWindowFactory(
+         IShellModule owner, 
+         IBus bus, 
+         IWindowManager wm, 
+         UserSettingsHub settings_hub, 
+         OrdersModel orders_model,
+         MBOService mbo)
+
         : base(owner, "SparkLadder") {
         _bus = bus;
         _wm = wm;
         _settings_hub = settings_hub;
         _orders_model = orders_model;
         _ladder_conf = new LadderConfig(Configuration.get<bts.config.LadderKnobs>(), Configuration.get<bts.config.MultiThreadedWindows>().ladder);
+         _mbo = mbo;
         _dispose = Disposable.Create(
            bus.subscribe(SparkTags.SecuritiesTag).Subscribe(s => _securities = s),
            bus.subscribe(SparkTags.ShowLadderTag).OnDispatcher().Subscribe(s => show_windows(new[] { s })),
@@ -42,63 +56,217 @@ namespace bts.shell {
      public async override Task<IShellWindow> load(LadderSaveState state) {
         await Wait.until_true(() => _securities.ContainsKey(state.security_key), _ladder_conf.security_timeout);
         if (_securities.TryGetValue(state.security_key, out SecurityMD security)) {
-            return create_ladder_window(security, state.settings);
+            return create_ladder_window(security, state.settings, state.settings_id);
         }
         return null;
      }

-      static LadderSaveState _get_state(LadderVM vm) =>
-         new LadderSaveState { security_key = vm.security.Id, settings = vm.get_save_state() };
+      LadderSaveState _get_state(LadderVM vm, uint id) {
+         LadderSettings s = vm.get_save_state();
+         if (id != 0) {
+            if (!_settings_hub.current.ladder_profiles.TryGetFirst(lp => lp.id == id, out var result)) {
+               // profile was deleted
+               id = 0;
+            } else {
+               var curr_profile = _fit_to_sec(result.value, vm.security.ContractCase);
+               if (!s.Equals(curr_profile)) {
+                  // ladder's settings diverged from the profile (this happens when the user changes settings outside of the settings dialog, such as column widths, left panel width, etc.)
+                  id = 0;
+               }
+            }
+         }
+         return new LadderSaveState { security_key = vm.security.Id, settings = s, settings_id = id };
+      }

      int _ladder_count = 0;
-      IShellWindow create_ladder_window(SecurityMD md, LadderSettings state_settings) {
-         var id = Interlocked.Increment(ref _ladder_count) % Environment.ProcessorCount;
+      IShellWindow create_ladder_window(SecurityMD md, LadderSettings state_settings, uint settings_id = 0) {
+         IDisposable active_settings_dialog = null;
+         var thread_id = Interlocked.Increment(ref _ladder_count) % Environment.ProcessorCount;
+         // on_shell_window_vm should behave like an event (do not set to null)
+         Action<ShellWindowVM> on_shell_window_vm = _ => { };
+         ShellWindowVM shell_window_vm = null;
+         IShellWindow shell_window = null;
+         var title_source = new LazyObservable<string>(() => ShellWindowExtensions.literal_title_source(shell_window, shell_window_vm));
         var view = new Lazy<UIElement>(() => {
-            var model = new LadderModel(md, _orders_model);
-            var settings_manager = new WindowSettingsManager<LadderSettings>(
-               _settings_hub, state_settings == null || state_settings.use_defaults ? null : state_settings,
-               us => sanitize_ladder_settings(us.ladder),
-               (us, v) => us.with(sanitize_ladder_settings(v)));
-            var init = state_settings ?? settings_manager.default_settings;
-            init.use_defaults |= state_settings == null;
-            var vm = LadderVM.create(_bus, model, settings_manager, init);
+            // resources
+            var model = new LadderModel(md, _orders_model, _mbo);
+            var profile_service = new SettingsProfileService<LadderSettings>(_settings_hub,
+               us => ImmutableDictionary<uint, SettingsProfile<LadderSettings>>.Empty.AddRange(us.ladder_profiles.ToDictionary(
+                  lp => lp.id,
+                  lp => new SettingsProfile<LadderSettings>(lp.id, lp.name, LadderSettings.sanitize(lp.value), lp.security_criteria))),
+               (us, lps) => us.with(ladder_profiles: lps.Values.Select(lp => new LadderSettingsProfile(lp.id, lp.name, lp.value, lp.security_criteria)).ToArray()));
+            state_settings?.sanitize();
+            /// When settings are adjusted outside of the settings dialog, the vm should raise the <see cref="LadderVM.settings_invalidated"/> event.
+            /// In response to that event, 'needs_resync' is set to true. This causes 'last_value' to be refreshed when the next caller requests the latest settings
+            /// (i.e., an IObserver subscribing to the settings_source, or the settings-dialog viewmodel).
+            bool initialized = false, needs_resync = false;
+            LadderSettings last_value = fit_to_sec(state_settings);
+            LadderVM vm = null;
+            var settings_subject = new Subject<LadderSettings>();
+            var settings_source = Observable.Create<LadderSettings>(o => {
+               ensure_synced();
+               if (last_value != null)
+                  o.OnNext(last_value);
+               return settings_subject.Subscribe(s => {
+                  if (s != null)
+                     o.OnNext(s);
+               });
+            });
+            // vm
+            vm = LadderVM.create(_bus, model, LadderSettings.sanitize(last_value ?? _settings_hub.current.ladder), settings_source);
+            vm.settings_invalidated += on_settings_invalidated;
            vm.order_properties_vm.open_algo_popup_on_select = _ladder_conf.open_algo_popup_on_select;
            vm.order_properties_vm.use_algo_param_grid = _ladder_conf.use_algo_param_grid;
+            vm.request_settings_dialog += open_settings_dialog;
+            var settings_subscription = _settings_hub.subscribe_default_settings().Subscribe(on_user_settings);
+            vm.OnDisposed += disposing => {
+               Disposable.dispose(ref settings_subscription);
+               Disposable.dispose(ref active_settings_dialog);
+               Disposable.dispose(ref settings_subject);
+            };
+            // view
            var lv = new LadderView(vm);
            foreach (var kv in AlgoStudioModelUtils.get_dynamic_resources(vm.model.order_gateway.algo_model.ui_configuration))
               lv.Resources[kv.Key] = kv.Value;
            return lv;
+            // local methods
+            LadderSettings fit_to_sec(LadderSettings s) =>
+               _fit_to_sec(s, md.security.ContractCase);
+
+            void on_settings_invalidated() =>
+               needs_resync = true;
+
+            void ensure_synced() {
+               if (!needs_resync)
+                  return;
+               var curr = vm.get_save_state();
+               if (settings_id == 0) {
+                  last_value = curr;
+               } else if (!curr.Equals(last_value)) {
+                  settings_id = 0;
+                  last_value = curr;
+               }
+               needs_resync = false;
+            }
+
+            void on_user_settings(UserSettings us) {
+               if (initialized) {
+                  ensure_synced();
+                  if (settings_id == 0) {
+                     // not on a profile, don't respond to default settings changes
+                     return;
+                  } else if (us.ladder_profiles.TryGetFirst(p => p.id == settings_id, out var profile)) {
+                     if (!last_value.Equals(vm.get_save_state())) {
+                        settings_id = 0;
+                     } else {
+                        settings_subject.OnNext(last_value = fit_to_sec(profile.value));
+                     }
+                  } else {
+                     // profile was deleted; keep the current settings and switch to the 'Local' profile.
+                     settings_id = 0;
+                  }
+               } else if (_settings_hub.initialized) {
+                  initialized = true;
+                  if (settings_id != 0) {
+                     if (us.ladder_profiles.TryGetFirst(p => p.id == settings_id, out var profile)) {
+                        last_value = fit_to_sec(profile.value);
+                     } else {
+                        settings_id = 0;
+                     }
+                  }
+                  if (settings_id == 0 && last_value == null) {
+                     foreach (var lp in _settings_hub.current.ladder_profiles) {
+                        // TODO: Use a kind of 'match priority' to resolve conflicts when the security is included in more than 1 profile's security criteria.
+                        // In the meantime, simply use the first match.
+                        if (lp.security_criteria.includes(md.security)) {
+                           last_value = fit_to_sec(lp.value);
+                           settings_id = lp.id;
+                           break;
+                        }
+                     }
+                     if (last_value == null)
+                        last_value = fit_to_sec(_settings_hub.current.ladder);
+                  }
+                  settings_subject.OnNext(last_value);
+               }
+            }
+
+            void open_settings_dialog() {
+               // dialog vm
+               var dialog_vm = new ProfiledShellSettingsDialogVM<LadderSettings, LadderSettingsVM, LadderSettingsProfile>(
+                  profile_service,
+                  us => us.ladder ?? LadderSettings.Default,
+                  s => {
+                     var svm = new LadderSettingsVM(model.order_gateway, vm.security);
+                     svm.load(s);
+                     return svm;
+                  },
+                  fit_to_sec,
+                  vm.get_save_state(),
+                  UserSettings.FileExtensions.LADDER,
+                  settings_id);
+               dialog_vm.applied += apply;
+               // dialog
+               var dialog = new ShellSettingsDialog { DataContext = dialog_vm };
+               dialog_vm.SubscribeDisposed(title_source.OnDispatcher().Subscribe(t => dialog_vm.title = t));
+               dialog.Resources[ShellSettingsDialog.SecurityMapKey] = _securities;
+               dialog_vm.RequestClose += on_request_close;
+               dialog.Closed += on_closed;
+               Disposable.replace(ref active_settings_dialog, Disposable.Create(destroy_all));
+               dialog.move_to_mouse(-500, -500);
+               dialog.Show();
+               // local methods
+               void apply(SettingsProfile<LadderSettings> profile) {
+                  settings_id = profile.id;
+                  last_value = profile.value;
+                  settings_subject.OnNext(profile.value);
+               }
+               // idempotent
+               void destroy_all() {
+                  destroy_window();
+                  destroy_vm();
+               }
+               // idempotent
+               void destroy_window() {
+                  if (dialog == null) return;
+                  try {
+                     var temp = dialog;
+                     dialog = null;
+                     temp.Closed -= on_closed;
+                     temp.Close();
+                  } catch (Exception ex) {
+                     on_error("closing window", ex);
+                  }
+               }
+               // idempotent
+               void destroy_vm() {
+                  if (dialog_vm == null) return;
+                  try {
+                     var temp = dialog_vm;
+                     dialog_vm = null;
+                     temp.applied -= apply;
+                     temp.RequestClose -= on_request_close;
+                     temp.Dispose();
+                  } catch (Exception ex) {
+                     on_error("disposing vm", ex);
+                  }
+               }
+               void on_closed(object sender, EventArgs e) => destroy_all();
+               void on_request_close(object sender, EventArgs e) => destroy_all();
+               void on_error(string action_desc, Exception error) =>
+                  Log.Ui.warn($"LadderSettingsDialog error {action_desc}: {error}.");
+            }
         });
-         string thread = _ladder_conf.ladders_on_threads ? $"Ladder{id:00}" : "";
-         return ShellWindow.create(
+         string thread = _ladder_conf.ladders_on_threads ? $"Ladder{thread_id:00}" : "";
+         return shell_window = ShellWindow.create(
            module, md.security.ToString(), _window_type, view,
-            (v,s) => save(_get_state(((LadderView)v).vm), s), 
-            icon: Icons.Ladder, 
-            thread_id: thread);
-         // if there are new props, make sure they are not null, invalid, etc.
-         LadderSettings sanitize_ladder_settings(LadderSettings s) {
-            // these MarketBreakLines are new settings props, ensure they are not null
-            if (s.bid_break_line == null)
-               s.bid_break_line = LadderSettings.Default.bid_break_line;
-            if (s.ask_break_line == null)
-               s.ask_break_line = LadderSettings.Default.ask_break_line;
-            if (s.mid_break_line == null)
-               s.mid_break_line = LadderSettings.Default.mid_break_line;
-            if (s.session_low_line == null)
-               s.session_low_line = LadderSettings.Default.session_low_line;
-            if (s.session_high_line == null)
-               s.session_high_line = LadderSettings.Default.session_high_line;
-            if (s.session_range_fill == null)
-               s.session_range_fill = LadderSettings.Default.session_range_fill;
-            if (s.volume_column == null)
-               s.volume_column = LadderSettings.Default.volume_column;
-            if (s.size_display == null)
-               s.size_display = MarketSizeDisplay.get_default();
-            if (s.size_display.normal == null)
-               s.size_display = s.size_display.with(MarketSizeDisplay.get_default().normal);
-            s.row_height = LadderRender.measure_row_height(s);
-            return s;
-         }
+            (v, s) => save(_get_state(((LadderView)v).vm, settings_id), s),
+            icon: Icons.Ladder,
+            thread_id: thread,
+            vm => {
+               shell_window_vm = vm;
+               title_source.connect();
+            });
      }

      void show_windows(IReadOnlyCollection<SecurityMD> securities) {
@@ -115,26 +283,19 @@ namespace bts.shell {
         }
      }

-      // TODO: whenever we re-implement the linked ladder, need to add some field to the LadderSaveState to indicate the owning window
-      //void show_linked(IObservable<SecurityMD> keystream) {
-      //   var view = new LadderView();
-      //   IDisposable sub = null;
-      //   var window =
-      //      ShellWindow.create(module, "loading", view,
-      //      Disposable.Create(() => {
-      //         (view.DataContext as LadderVM)?.Dispose();
-      //         sub?.Dispose();
-      //      }), s => {
-      //         var vm = view.DataContext as LadderVM;
-      //         if (vm != null) save(_get_state(vm), s);
-      //      }, Icons.Ladder);
-      //   sub =
-      //      keystream
-      //      .Select(smd => new LadderVM(_bus, new LadderModel(smd, _orders_model),
-      //         Observable.Return(_orders_model.factory.default_ladder_settings(smd.security)))
-      //      ).Aggregate((old, vm) => { old.Dispose(); return vm; })
-      //      .Subscribe(vm => { view.DataContext = vm; window.Title = vm.security.ToString(); });
-      //}
+      LadderSettings _fit_to_sec(LadderSettings s, Security.ContractOneofCase sec_type) {
+         if (s == null) return null;
+         var algo_key = AlgoID.to_algo_key(s.default_algo, _orders_model.dynamic_helper.dynamic_type_index);
+         if (algo_key.mode == AlgoKey.Mode.Factory) {
+            var fitted_algo = OrderDataHelper.fit_to_type(algo_key.factory.structure.build_algo(_orders_model.dynamic_helper), sec_type, true);
+            if (fitted_algo.HasValue) {
+               // be sure to clone ('s' may be shared)
+               s = SparkUtils.clone_proto(s);
+               s.default_algo = AlgoID.from_custom_def(fitted_algo.Value);
+            }
+         }
+         return s;
+      }

      readonly struct LadderConfig {
         public readonly uint max_open_ladders;
@@ -157,5 +318,7 @@ namespace bts.shell {
      public UInt32 security_key;
      [ProtoMember(2)]
      public mbts.spark.LadderSettings settings;
+      [ProtoMember(3)]
+      public uint settings_id;
   }
-}
+}
@@ -1,5 +1,7 @@
 using bts.api;
 using bts.api.orderman;
+using bts.shell.orderbook;
+using mbts.persist;
 using mbts.ui;
 using mbts.ui.shell;
 using System;
@@ -44,11 +46,14 @@ namespace mbts.spark {
      double _real_price = double.NaN, _phantom_price = double.NaN;
      uint filled, quantity, num_root_orders;
      int working_quantity;
+      uint? _min_piq = UInt32.MaxValue;
+
+      public event Action piq_changed;

      LadderModel model => _owner.model;
-      Dictionary<uint, (OrderRecordImmutable order, uint? p, AlgoDefinitionMetadata? meta)> _orders = new Dictionary<uint, (OrderRecordImmutable order, uint? p, AlgoDefinitionMetadata? meta)>();
+      Dictionary<uint, (OrderRecordImmutable order, uint? p, AlgoData? algo, AlgoDefinitionMetadata? meta)> _orders = new Dictionary<uint, (OrderRecordImmutable order, uint? p, AlgoData? algo, AlgoDefinitionMetadata? meta)>();

-      public LadderOrderVM((OrderRecordImmutable, uint?, AlgoDefinitionMetadata?) op, double real_price, LadderVM owner, IBus bus, IObservable<LadderSettings.BadgeStyle> bs) {
+      public LadderOrderVM((OrderRecordImmutable, uint?, AlgoData?, AlgoDefinitionMetadata?) op, double real_price, LadderVM owner, IBus bus, IObservable<LadderSettings.BadgeStyle> bs) {
         _owner = owner;
         _bus = bus;
         _bs = bs;
@@ -114,7 +119,7 @@ namespace mbts.spark {
            var single_order_metadata = _owner.model.order_gateway.factory.get_metadata(single_order);
            border = single_order_metadata.Color.rgb_brush();
            if (_orders.TryGetValue(single_order.Key, out var opm)) {
-               algo_studio_abbreviation = opm.meta?.abbreviation ?? string.Empty;
+               algo_studio_abbreviation = _sanitize_abbreviation(string.IsNullOrEmpty(opm.meta?.abbreviation) ? _generate_abbreviation_for_algo_studio_algo(opm.algo) : opm.meta?.abbreviation);
               border = opm.meta?.badge_color?.rgb_color().rgb_brush() ?? border;
            } 
            if (single_order.order_type().is_bts_algo_type()) {
@@ -131,6 +136,34 @@ namespace mbts.spark {

         _set_badge_text();

+         string _generate_abbreviation_for_algo_studio_algo(AlgoData? a) {
+            char[] delim = { ' ' };
+            string candidate = string.Empty;
+            if (a.HasValue) {
+               var algo_name = a.Value.name;
+               var words = algo_name.Split(delim);
+               if (words.Length == 1) {
+                  var single_word = words[0];
+                  if (single_word.Length > 1) {
+                     candidate = words[0];
+                  } else {
+                     candidate = single_word;
+                  }
+               } else {
+                  candidate = words.Take(2).Select(w => w.Substring(0, 1)).list_string(string.Empty);
+               }
+            }
+            return candidate.ToUpper();
+         }
+
+         string _sanitize_abbreviation(string ab) {
+            string candidate = ab;
+            if (ab.Length > 2) {
+               candidate = candidate.Substring(0, 2);
+            }
+            return candidate.ToUpper();
+         }
+
      }

      private void _set_badge_text() {
@@ -138,12 +171,32 @@ namespace mbts.spark {
         RaisePropertyChanged(nameof(text_lines));
      }

-      public void add_order((OrderRecordImmutable order, uint? p, AlgoDefinitionMetadata? meta) new_op) {
+      /// <summary>
+      /// Add Order performs an add the first time it's called via the constructor. When it's called, directly
+      /// it really serves as an update/replace. Also note that since the min_piq is a separate piece of state representing
+      /// the lowest piq of the orders the badge represents, we must reevaluate if that has changed on said update.
+      /// </summary>
+      public void add_order((OrderRecordImmutable order, uint? p, AlgoData? algo, AlgoDefinitionMetadata? meta) new_op) {
         _orders[new_op.order.Key] = new_op;
+         // reevaluate min piq if this order's piq is less
+         if (new_op.p.HasValue) {
+            // if this lovm only represents 1 order and the piq is now different, regardless of what it is that's our piq
+            if (_orders.Count == 1 && new_op.p.Value != min_piq) {
+               min_piq = new_op.p.Value;
+            } else if (new_op.p.Value < min_piq) {
+               min_piq = new_op.p.Value;
+            }
+         }
      }

      public void remove_order(uint order_key) {
         _orders.Remove(order_key);
+         // on a remove, potentially the order w/ the lowest piq has been removed, so
+         // if the min() is now > than the current min_piq, update the min_piq
+         var prospective_piq = _orders.Select(op => op.Value.p).Where(piq => piq.HasValue).Min();
+         if (prospective_piq > min_piq) {
+            min_piq = prospective_piq;
+         }
      }

      //public void update(OrderRecordImmutable neworder) {
@@ -155,7 +208,16 @@ namespace mbts.spark {

      public uint security_key => _owner.security.Id;
      public double price { get => double.IsNaN(_phantom_price) ? _real_price : _phantom_price; }
-      public uint? min_piq => _orders.Select(op => op.Value.p).Where(piq => piq.HasValue).Min();
+      public uint? min_piq {
+         get {
+            return _min_piq;
+         }
+         set {
+            if (Set(ref _min_piq, value)) {
+               piq_changed?.Invoke();
+            }
+         }
+      }
      public double real_price => _real_price;
      public Side side {
         get {
@@ -232,50 +294,29 @@ namespace mbts.spark {
         price_filter.minimum.value = real_price;
         price_filter.maximum.value = real_price;

-         var obvm = new OrderBookVM(null, _owner.bus, null, _owner.model.order_gateway, null, true);
         var state = new bts.shell.orderbook.OrderBookStartupData(
            new bts.shell.orderbook.FilterStates {
               security_criteria = new SecurityCriteria(_owner.security),
               price = price_filter,
-               statuses = new[] { OrderStatus.Working }
+               statuses = new[] { OrderStatus.Working },
+               order_types = AlgoID.exchange_algo_keys
            },
-            bts.shell.orderbook.OrderBookStartupData.default_mini_grid,
+            bts.shell.orderbook.OrderBookStartupData.default_mini_grid.with(_owner.current_settings.mini_ob.value),
            use_defaults: false
         );
-         // NOTE:
-         // we might need the ObservableAppend to InsertAt
-         // if these EditXXX ever support settings.
-
-         // The end result after this group of lines will be
-         //  ----------------------------------------------
-         //  | Cancel | Update | Qty | Price | Commit | Attach | Detach | ...
-         //  ----------------------------------------------
-         //
+         var settings_man = new WindowSettingsManager<OrderBookGridSettings>.DisconnectedImpl(state.orderbook_grid);
+         var obvm = new OrderBookVM(_owner.bus, null, _owner.model.order_gateway, settings_man, true);
+         _owner.settings.Subscribe(s => settings_man.instance_settings = settings_man.instance_settings.with(s.mini_ob.value));
         obvm.columns.Insert(0, new OrderBookVM.AttachDetachColumn(typeof(MiniOrderBookView)));
         obvm.columns.Insert(0, new OrderBookVM.CommitColumn());
-         var price_col = obvm.columns.FirstOrDefault(x => x.id == OrderBookGridView.ColumnKeys.Price.ToString());
-         var price_index = obvm.columns.indexOf(price_col);
-         if (price_index > -1) {
-            var existing_editprice_col = obvm.columns.FirstOrDefault(x => x.id == OrderBookGridView.ColumnKeys.EditablePrice.ToString());
-            var existing_editprice_index = obvm.columns.indexOf(existing_editprice_col);
-            if (existing_editprice_index == -1) {
-               // insert the edit price column at the beginning
-               obvm.columns.Insert(0, new OrderBookVM.EditablePriceColumn());
-            }
-         }
-         var qty_col = obvm.columns.FirstOrDefault(x => x.id == OrderBookGridView.ColumnKeys.Size.ToString());
-         var qty_index = obvm.columns.indexOf(qty_col);
-         if (qty_index > -1) {
-            var existing_editqty_col = obvm.columns.FirstOrDefault(x => x.id == OrderBookGridView.ColumnKeys.EditableQty.ToString());
-            var existing_editqty_index = obvm.columns.indexOf(existing_editqty_col);
-            if (existing_editqty_index == -1) {
-               // insert the edit quantity column at the beginning
-               obvm.columns.Insert(0, new OrderBookVM.EditableQtyColumn());
-            }
-         }
+         obvm.columns.Insert(0, new OrderBookVM.EditablePriceColumn());
+         obvm.columns.Insert(0, new OrderBookVM.EditableQtyColumn());
         obvm.columns.Insert(0, new OrderBookVM.UpdateColumn(typeof(MiniOrderBookView)));
         obvm.columns.Insert(0, new OrderBookVM.CancelColumn(nameof(OrderBookRowVM.cancel_command)));
-
+         // the CheckColumn must be inserted at the front of the ObservableAppendCollection,
+         // and not mixed with the other columns in said ObservableAppendCollection's underlying ObservableCollection (the settings dialog uses the underlying collection).
+         // The user cannot adjust this column in the settings dialog, and it should always be the left-most column.
+         obvm.columns.insert_front(new OrderBookVM.CheckColumn(nameof(OrderBookRowVM.is_selected)));
         obvm.load_from(state);
         return obvm;
      }
@@ -1,5 +1,8 @@
-using bts.api;
+using bts;
+using bts.api;
+using bts.api.orderman;
 using bts.collections;
+using bts.shell.orderbook;
 using bts.utils;
 using mbts.collections;
 using mbts.ui;
@@ -8,10 +11,14 @@ using mbts.ui.controls.color_picker;
 using mbts.ui.shell;
 using mbts.ui.spark;
 using mbts.ui.utility;
+using mbts.utils;
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.Collections.Specialized;
+using System.ComponentModel;
 using System.Linq;
+using System.Reactive.Disposables;
 using System.Reactive.Linq;
 using System.Windows;
 using System.Windows.Input;
@@ -19,19 +26,30 @@ using System.Windows.Media;
 using TextUtils = mbts.ui.utility.text.TextUtils;

 namespace mbts.spark {
-   class LadderSettingsVM : ViewModelBase, IWindowSettingsVM<LadderSettings>, ITemplateSelectorKey, IDisposable {
+   class LadderSettingsVM : DisposableViewModelBase, IWindowSettingsVM<LadderSettings>, IValueFactory<LadderSettings>, IObservable<LadderSettings>, ITemplateSelectorKey {
      readonly Property<LadderSettings.BadgeStyle> _badge_style;
      readonly Property<uint> _alternate_order_size;
      readonly DelegateProperty<double> _row_height;
-      Func<double> _get_order_entry_panel_width, _get_zoom_factor;
+      readonly UserProperty<AccountTuple?> _default_account;
+      readonly UserProperty<AlgoDefinitionVM> _default_algo;
+      readonly DeferrableActionWrapper _update;
+      readonly ObservableKeyedCollection<AccountTuple?, uint> _accounts = new ObservableKeyedCollection<AccountTuple?, uint>(AccountTuple.nullable_key_fn);
+      readonly ObservableKeyedCollection<AlgoDefinitionVM, AlgoKey> _algo_definitions = new ObservableKeyedCollection<AlgoDefinitionVM, AlgoKey>(d => d.key);
+      readonly OrdersModel _model;
+      uint? _desired_account;
+      AlgoID? _desired_algo;
+      TimeInForce _default_time_in_force;
+      LadderSettings.NetChangeTerms _price_format;
+      double _order_entry_panel_width, _zoom_factor;
+      bool _auto_clear, _show_warn_on_cross;
      LadderSettings _current;
      LadderColumnSettingsVM
         _orders = new OrdersColumnSettingsVM(),
         _bid = new LadderColumnSettingsVM("Bid"),
         _price = new LadderColumnSettingsVM("Price"),
         _ask = new LadderColumnSettingsVM("Ask"),
-         _last = new LadderColumnSettingsVM("Last", true),
-         _piq = new LadderColumnSettingsVM("PIQ", true);
+         _last = new LadderColumnSettingsVM("Last", LadderSettingsView.LastColumnTemplateKey, true),
+         _piq = new LadderColumnSettingsVM("PIQ", can_toggle_show: true);
      VolumeColumnVM _volume = new VolumeColumnVM();
      LadderMarketBreakLineVM
         _bid_mkt_line = new LadderMarketBreakLineVM("Bid"),
@@ -52,31 +70,25 @@ namespace mbts.spark {
         _tif_visibility = new OrderEntryPanelItemVisibilityVM("Time In Force"),
         _order_type_visibility = new OrderEntryPanelItemVisibilityVM("Order Type"),
         _account_position_visibility = new OrderEntryPanelItemVisibilityVM("Account Position"),
+         _day_position_visibility = new OrderEntryPanelItemVisibilityVM("Day Position"),
         _size_preset_visibility = new OrderEntryPanelItemVisibilityVM("Size Presets"),
         _auto_clear_visibility = new OrderEntryPanelItemVisibilityVM("Auto Clear"),
         _clear_visibility = new OrderEntryPanelItemVisibilityVM("Clear"),
         _cancel_buys_visibility = new OrderEntryPanelItemVisibilityVM("Cancel Buys"),
         _cancel_sells_visibility = new OrderEntryPanelItemVisibilityVM("Cancel Sells"),
         _cancel_all_visibility = new OrderEntryPanelItemVisibilityVM("Cancel All");
-      readonly Property<bool> 
-         _show_in_net_change,
-         _show_in_net_change_dollars,
-         _show_in_net_change_ticks;

-      public LadderSettingsVM(OrdersModel model, bool is_synthetic, Func<double> get_left_panel_width, Func<double> get_zoom_factor) {
-         this.is_synthetic = is_synthetic;
-         favorite_algos_vm = new FavoriteAlgosVM(model);
+      public LadderSettingsVM(OrdersModel model, SecurityImmutable security) {
+         _model = model;
+         is_synthetic = security.ContractCase == Security.ContractOneofCase.Synthetic;
+         favorite_algos_vm = new FavoriteAlgosVM(_algo_definitions);
         size_presets = new ObservableEditableCollection<IMutableValueWrapperVM<uint>>(_create_size_preset_vm);
         size_presets.CollectionChanged += (s, e) => RaisePropertyChanged(nameof(size_presets_text));
         _badge_style = backing<LadderSettings.BadgeStyle>(nameof(badge_style));
         _badge_style.Changed += _badge_style_Changed;
         _alternate_order_size = backing<uint>(nameof(alternate_order_size));
-         _get_order_entry_panel_width = get_left_panel_width;
-         _get_zoom_factor = get_zoom_factor;
-         _show_in_net_change = backing<bool>(nameof(show_in_net_change));
-         _show_in_net_change_dollars = backing<bool>(nameof(show_in_net_change_dollars));
-         _show_in_net_change_ticks = backing<bool>(nameof(show_in_net_change_ticks));
-         
+         _default_account = user_backing<AccountTuple?>(nameof(default_account));
+         _default_algo = user_backing<AlgoDefinitionVM>(nameof(default_algo));
         // be sure to initialize backings before this measure_row_height call
         _row_height = backing(nameof(row_height), () => LadderRender.measure_row_height(get_result()));
         _orders.font_size_changed += on_font_size_changed;
@@ -85,10 +97,50 @@ namespace mbts.spark {
         _ask.font_size_changed += on_font_size_changed;
         _last.font_size_changed += on_font_size_changed;
         _piq.font_size_changed += on_font_size_changed;
-
+         // accounts
+         accounts_view = new ListCollectionView<AccountTuple?>(_accounts) {
+            CustomSort = Comparer<AccountTuple>.Default.to_nullable().to_non_generic()
+         };
+         // update
+         _update = new DeferrableActionWrapper(() => result_changed?.Invoke());
+         mini_ob.result_changed += _update.execute;
+         foreach (var c in _observable_components)
+            c.PropertyChanged += on_prop_changed;
+         favorite_algos_vm.items.CollectionChanged += on_favorite_algo_items_CollectionChanged;
+         _algo_definitions.AddRange(_model.factory.default_algos(security).Values.Select(algo_factory));
+         _dispose = new CompositeDisposable(
+            _model.factory.subscribe_accounts().OnDispatcher().Subscribe(acc_map => {
+               _accounts.SyncWithDictionary(MappedDictionary.create(acc_map, account_factory));
+               _try_select_desired_account();
+            }),
+            ObservableAutoWrapper.connect_item_hooks(favorite_algos_vm.items, connect_favorite_algo),
+            _model.algo_model.definitions.OnDispatcher().Subscribe(update => {
+               AlgoCollectionHelper.update_persisted_definitions(_algo_definitions, update, algo_factory);
+               _try_select_desired_algo();
+            })
+         ) { dispose_resources };
+         // local methods
         void on_font_size_changed(double oldval, double newval) => _row_height.refresh();
+         void on_prop_changed(object sender, PropertyChangedEventArgs e) => _update.execute();
+         void on_favorite_algo_items_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e) => _update.execute();
+         IDisposable connect_favorite_algo(FavoriteAlgoItem item) {
+            item.PropertyChanged += on_prop_changed;
+            return Disposable.Create(() => item.PropertyChanged -= on_prop_changed);
+         }
+         void dispose_resources() {
+            mini_ob.result_changed -= _update.execute;
+            mini_ob.Dispose();
+            favorite_algos_vm.items.CollectionChanged -= on_favorite_algo_items_CollectionChanged;
+            favorite_algos_vm.Dispose();
+            foreach (var c in _observable_components)
+               c.PropertyChanged -= on_prop_changed;
+         }
+         AccountTuple? account_factory(KeyValuePair<uint, string> kv) => new AccountTuple(kv.Key, kv.Value);
+         AlgoDefinitionVM algo_factory(AlgoData data) => AlgoDefinitionVM.create(_model, data, false);
      }

+      public event Action result_changed;
+
      private void _badge_style_Changed(LadderSettings.BadgeStyle oldval, LadderSettings.BadgeStyle newval) {
         if (newval == LadderSettings.BadgeStyle.Alternate && _orders.font_size == 10) {
            _orders.font_size = 7;
@@ -109,6 +161,27 @@ namespace mbts.spark {
      }

      public MarketSizeDisplayVM size_display { get; } = new MarketSizeDisplayVM();
+      public SimpleGridSettingsVM mini_ob { get; } = new SimpleGridSettingsVM(OrderBookGridSettingsManager.hard_column_flags);
+      // price format
+      public LadderSettings.NetChangeTerms price_format { get => _price_format; set => Set(ref _price_format, value); }
+      public IEnumerable<LadderSettings.NetChangeTerms> price_format_options => EnumHelper.get_values<LadderSettings.NetChangeTerms>();
+      // time in force
+      public TimeInForce default_time_in_force { get => _default_time_in_force; set => Set(ref _default_time_in_force, value); }
+      public IEnumerable<TimeInForce> time_in_force_options => EnumHelper.get_values_except(TimeInForce.Undefined);
+      // account
+      public AccountTuple? default_account { get => _default_account.Value; set => _default_account.Value = value; }
+      public ICollectionView<AccountTuple?> accounts_view { get; }
+      // algo
+      public AlgoDefinitionVM default_algo { get => _default_algo.Value; set => _default_algo.Value = value; }
+      public IReadOnlyObservableCollection<AlgoDefinitionVM> algo_definitions => _algo_definitions;
+      // left-panel (components)
+      public bool auto_clear { get => _auto_clear; set => Set(ref _auto_clear, value); }
+      public double order_entry_panel_width { get => _order_entry_panel_width; set => Set(ref _order_entry_panel_width, value); }
+      public double zoom_factor { get => _zoom_factor; set => Set(ref _zoom_factor, value); }
+      // safety checks
+      public bool show_warn_on_cross { get => _show_warn_on_cross; set => Set(ref _show_warn_on_cross, value); }
+
+      // favorites
      public FavoriteAlgosVM favorite_algos_vm { get; }

      public double row_height => _row_height.Value;
@@ -164,6 +237,7 @@ namespace mbts.spark {
            yield return _tif_visibility;
            yield return _order_type_visibility;
            yield return _account_position_visibility;
+            yield return _day_position_visibility;
            yield return _size_preset_visibility;
            yield return _clear_visibility;
            yield return _auto_clear_visibility;
@@ -173,87 +247,133 @@ namespace mbts.spark {
         }
      }

-      public bool show_in_net_change {
-         get => _show_in_net_change.Value;
-         set {
-            // when unchecking, clear out dollars and ticks
-            if (!value) {
-               show_in_net_change_dollars = false;
-               show_in_net_change_ticks = false;
-            }
-            // when checking, by defalt check dollars
-            if (value) {
-               show_in_net_change_dollars = true;
-            }
-            _show_in_net_change.Value = value;
-         }
-      }
-      public bool show_in_net_change_dollars {
-         get => _show_in_net_change_dollars.Value;
-         set => _show_in_net_change_dollars.Value = value;
-      }
-
-      public bool show_in_net_change_ticks {
-         get => _show_in_net_change_ticks.Value;
-         set => _show_in_net_change_ticks.Value = value;
-      }
-
-
      public string key => GridSettingsTemplateKeys.Ladder;

+      IEnumerable<INotifyPropertyChanged> _observable_components {
+         get {
+            // columns
+            yield return _orders;
+            yield return _bid;
+            yield return _price;
+            yield return _ask;
+            yield return _last;
+            yield return _piq;
+            yield return _volume;
+            yield return _volume.general;
+            // market break lines
+            yield return _bid_mkt_line;
+            yield return _ask_mkt_line;
+            yield return _mid_mkt_line;
+            yield return _session_low_mkt_line;
+            yield return _session_high_mkt_line;
+            yield return _session_range_fill;
+            // left panel
+            yield return _zoom_slider_visbility;
+            yield return _day_visibility;
+            yield return _high_visibility;
+            yield return _low_visibility;
+            yield return _open_visibility;
+            yield return _settle_visibility;
+            yield return _volume_visibility;
+            yield return _account_visibility;
+            yield return _tif_visibility;
+            yield return _order_type_visibility;
+            yield return _account_position_visibility;
+            yield return _day_position_visibility;
+            yield return _size_preset_visibility;
+            yield return _auto_clear_visibility;
+            yield return _clear_visibility;
+            yield return _cancel_buys_visibility;
+            yield return _cancel_sells_visibility;
+            yield return _cancel_all_visibility;
+            // other
+            yield return size_display;
+            yield return favorite_algos_vm;
+            yield return this;
+         }
+      }
+
      public void load(LadderSettings settings) {
-         _current = settings;
-         badge_style = settings.badge_style;
-         alternate_order_size = settings.alternate_order_size;
-         favorite_algos_vm.load_from(settings.favorite_algos);
-         size_display.load_from(settings.size_display);
-         size_presets.SetItems(settings.calculator_buttons.empty_if_null().Select(s => _create_size_preset_vm((uint)s)));
-         _orders.assign_from(_current.orders_column);
-         _bid.assign_from(_current.bid_column);
-         _ask.assign_from(_current.ask_column);
-         _price.assign_from(_current.price_column);
-         _volume.assign_from(_current.volume_column);
-         _last.assign_from(_current.last_column);
-         _piq.assign_from(_current.piq_column);
-         _bid_mkt_line.assign_from(_current.bid_break_line);
-         _ask_mkt_line.assign_from(_current.ask_break_line);
-         _mid_mkt_line.assign_from(_current.mid_break_line);
-         _session_low_mkt_line.assign_from(_current.session_low_line);
-         _session_high_mkt_line.assign_from(_current.session_high_line);
-         _session_range_fill.assign_from(_current.session_range_fill);
-         _zoom_slider_visbility.show = settings.zoom_slider_visible;
-         _day_visibility.show = settings.day_visible;
-         _high_visibility.show = settings.high_visible;
-         _low_visibility.show = settings.low_visible;
-         _open_visibility.show = settings.open_visible;
-         _settle_visibility.show = settings.settle_visible;
-         _volume_visibility.show = settings.volume_visible;
-         _account_visibility.show = settings.account_visible;
-         _tif_visibility.show = settings.tif_visible;
-         _order_type_visibility.show = settings.order_type_visible;
-         _account_position_visibility.show = settings.account_position_visible;
-         _size_preset_visibility.show = settings.size_presets_visible;
-         _clear_visibility.show = settings.clear_visible;
-         _auto_clear_visibility.show = settings.auto_clear_visible;
-         _cancel_buys_visibility.show = settings.cancel_buys_visible;
-         _cancel_sells_visibility.show = settings.cancel_sells_visible;
-         _cancel_all_visibility.show = settings.cancel_all_visible;
-         // do not read the order entry panel width here from settings
-         // because it could have changed from the UI
-         // there might be a better way of doing this, like how
-         // does the widths of the ladder grid column pull this off?
-         show_in_net_change = settings.net_change != LadderSettings.NetChangeTerms.None;
-         show_in_net_change_dollars = settings.net_change == LadderSettings.NetChangeTerms.Dollars;
-         show_in_net_change_ticks = settings.net_change == LadderSettings.NetChangeTerms.Ticks;
+         using (_update.defer_execution()) {
+            _current = settings;
+            badge_style = settings.badge_style;
+            alternate_order_size = settings.alternate_order_size;
+            favorite_algos_vm.load_from(settings.favorite_algos);
+            size_display.load_from(settings.size_display);
+            size_presets.SetItems(settings.calculator_buttons.empty_if_null().Select(s => _create_size_preset_vm((uint)s)));
+            mini_ob.load_from(settings.mini_ob.value);
+            // columns
+            _orders.assign_from(_current.orders_column);
+            _bid.assign_from(_current.bid_column);
+            _ask.assign_from(_current.ask_column);
+            _price.assign_from(_current.price_column);
+            _volume.assign_from(_current.volume_column);
+            _last.assign_from(_current.last_column);
+            _piq.assign_from(_current.piq_column);
+            // market break lines
+            _bid_mkt_line.assign_from(_current.bid_break_line);
+            _ask_mkt_line.assign_from(_current.ask_break_line);
+            _mid_mkt_line.assign_from(_current.mid_break_line);
+            _session_low_mkt_line.assign_from(_current.session_low_line);
+            _session_high_mkt_line.assign_from(_current.session_high_line);
+            _session_range_fill.assign_from(_current.session_range_fill);
+            // left-panel (defaults)
+            default_time_in_force = settings.default_time_in_force;
+            // - account
+            _desired_account = settings.default_account;
+            _try_select_desired_account(true);
+            // - algo
+            _desired_algo = settings.default_algo;
+            _try_select_desired_algo(true);
+            // - components
+            auto_clear = settings.auto_clear;
+            order_entry_panel_width = settings.order_entry_panel_initial_width;
+            zoom_factor = settings.zoom_factor;
+            // left-panel (show/hide)
+            _zoom_slider_visbility.show = settings.zoom_slider_visible;
+            _day_visibility.show = settings.day_visible;
+            _high_visibility.show = settings.high_visible;
+            _low_visibility.show = settings.low_visible;
+            _open_visibility.show = settings.open_visible;
+            _settle_visibility.show = settings.settle_visible;
+            _volume_visibility.show = settings.volume_visible;
+            _account_visibility.show = settings.account_visible;
+            _tif_visibility.show = settings.tif_visible;
+            _order_type_visibility.show = settings.order_type_visible;
+            _account_position_visibility.show = settings.account_position_visible;
+            _day_position_visibility.show = settings.day_position_visible;
+            _size_preset_visibility.show = settings.size_presets_visible;
+            _clear_visibility.show = settings.clear_visible;
+            _auto_clear_visibility.show = settings.auto_clear_visible;
+            _cancel_buys_visibility.show = settings.cancel_buys_visible;
+            _cancel_sells_visibility.show = settings.cancel_sells_visible;
+            _cancel_all_visibility.show = settings.cancel_all_visible;
+            price_format = settings.net_change;
+            // safety checks
+            show_warn_on_cross = settings.show_warn_on_cross;
+         }
      }

      public LadderSettings get_result() {
-         var clone = SparkUtils.clone_proto(_current);
+         LadderSettings clone;
+         if (_current == null) {
+            clone = new LadderSettings {
+               mini_ob = new LadderMiniOrderBookSettings(mini_ob.create())
+            };
+         } else {
+            clone = SparkUtils.clone_proto(_current);
+#pragma warning disable CS0612 // Type or member is obsolete
+            clone.mini_ob = new LadderMiniOrderBookSettings(_current.mini_ob.value != null ? 
+               mini_ob.create().with(sorting_criterion: _current.mini_ob.value.sorting_criterion) :
+               mini_ob.create());
+#pragma warning restore CS0612 // Type or member is obsolete
+         }
         clone.badge_style = badge_style;
         clone.alternate_order_size = alternate_order_size;
         clone.favorite_algos = favorite_algos_vm.create();
         clone.size_display = size_display.create();
         clone.calculator_buttons = size_presets.Select(vm => (int)vm.value).ToArray();
+         // columns, row height (the latter determined by columns font size)
         clone.orders_column = _orders.get_settings();
         clone.bid_column = _bid.get_settings();
         clone.price_column = _price.get_settings();
@@ -261,13 +381,28 @@ namespace mbts.spark {
         clone.volume_column = _volume.get_settings();
         clone.last_column = _last.get_settings();
         clone.piq_column = _piq.get_settings();
+         clone.row_height = LadderRender.measure_row_height(clone);
+         // market break lines
         clone.bid_break_line = _bid_mkt_line.get_settings();
         clone.ask_break_line = _ask_mkt_line.get_settings();
         clone.mid_break_line = _mid_mkt_line.get_settings();
         clone.session_low_line = _session_low_mkt_line.get_settings();
         clone.session_high_line = _session_high_mkt_line.get_settings();
         clone.session_range_fill = _session_range_fill.get_settings();
-         clone.row_height = LadderRender.measure_row_height(clone);
+         // left-panel (defaults)
+         clone.default_time_in_force = default_time_in_force;
+         // - account
+         if (default_account.HasValue)
+            clone.default_account = default_account.Value.id;
+         // - algo
+         clone.default_algo = default_algo != null ?
+            AlgoID.from_algo_key(default_algo.key, _model.dynamic_helper.dynamic_type_index) :
+            (_desired_algo ?? LadderSettings.Default.default_algo);
+         // - components
+         clone.auto_clear = auto_clear;
+         clone.order_entry_panel_initial_width = _order_entry_panel_width;
+         clone.zoom_factor = zoom_factor;
+         // left-panel (components)
         clone.day_visible = _day_visibility.show;
         clone.high_visible = _high_visibility.show;
         clone.low_visible = _low_visibility.show;
@@ -278,31 +413,30 @@ namespace mbts.spark {
         clone.tif_visible = _tif_visibility.show;
         clone.order_type_visible = _order_type_visibility.show;
         clone.account_position_visible = _account_position_visibility.show;
+         clone.day_position_visible = _day_position_visibility.show;
         clone.size_presets_visible = _size_preset_visibility.show;
         clone.auto_clear_visible = _auto_clear_visibility.show;
         clone.clear_visible = _clear_visibility.show;
         clone.cancel_buys_visible = _cancel_buys_visibility.show;
         clone.cancel_sells_visible = _cancel_sells_visibility.show;
         clone.cancel_all_visible = _cancel_all_visibility.show;
-         clone.order_entry_panel_initial_width = _get_order_entry_panel_width();
         clone.zoom_slider_visible = _zoom_slider_visbility.show;
-         clone.zoom_factor = _get_zoom_factor();
-         clone.net_change = _create_net_change_terms(show_in_net_change_dollars, show_in_net_change_ticks);
+         clone.net_change = price_format;
+         // safety checks
+         clone.show_warn_on_cross = show_warn_on_cross;
         return clone;
-
-         LadderSettings.NetChangeTerms _create_net_change_terms(bool dollars, bool ticks) {
-            if (dollars) {
-               return LadderSettings.NetChangeTerms.Dollars;
-            }
-            if (ticks) {
-               return LadderSettings.NetChangeTerms.Ticks;
-            }
-            return LadderSettings.NetChangeTerms.None;
-         }
-
      }

-      public void Dispose() => favorite_algos_vm.Dispose();
+      public IDisposable defer_updates() => _update.defer_execution();
+
+      IDisposable IObservable<LadderSettings>.Subscribe(IObserver<LadderSettings> observer) {
+         result_changed += notify;
+         return Disposable.Create(() => result_changed -= notify);
+         void notify() => observer.OnNext(get_result());
+      }
+
+      LadderSettings IValueFactory<LadderSettings>.create() => get_result();
+      void IValueFactory<LadderSettings>.load_from(LadderSettings value) => load(value);

      IMutableValueWrapperVM<uint> _create_size_preset_vm() => _create_size_preset_vm(0);
      IMutableValueWrapperVM<uint> _create_size_preset_vm(uint init) {
@@ -310,6 +444,20 @@ namespace mbts.spark {
         vm.PropertyChanged += (s, e) => RaisePropertyChanged(nameof(size_presets_text));
         return vm;
      }
+
+      void _try_select_desired_account(bool bypass_setter = false) {
+         if (_desired_account.HasValue && (!_default_account.setter_called || bypass_setter) && _accounts.TryGetValue(_desired_account.Value, out var acc_tup)) {
+            _desired_account = null;
+            _default_account.bypass_setter(acc_tup);
+         }
+      }
+
+      void _try_select_desired_algo(bool bypass_setter = false) {
+         if (_desired_algo.HasValue && (!_default_algo.setter_called || bypass_setter) && _algo_definitions.TryGetValue(AlgoID.to_algo_key(_desired_algo.Value, _model.dynamic_helper.dynamic_type_index), out var vm)) {
+            _desired_algo = null;
+            _default_algo.bypass_setter(vm);
+         }
+      }
 
      public class LadderColumnSettingsVM : ViewModelBase, ITemplateSelectorKey {
         readonly Property<double> _font_size;
@@ -319,11 +467,13 @@ namespace mbts.spark {
         readonly DelegateProperty<FontWeight> _font_weight;
         readonly DelegateProperty<string> _font_display_name;
         readonly Property<bool> _show;
-         readonly bool _can_toggle_visibility;
+         readonly string _template_key;
+         uint _width;

-         public LadderColumnSettingsVM(string name, bool can_toggle_visibility = false) {
+         public LadderColumnSettingsVM(string name, string template_key = null, bool can_toggle_show = false) {
            this.name = name;
-            _can_toggle_visibility = can_toggle_visibility;
+            _template_key = template_key;
+            this.can_toggle_show = can_toggle_show;
            foreground_palettes = new ObservableCollection<ColorPaletteVM>(ColorPalette.all_presets().Select(p => new ColorPaletteVM(p)));
            background_palettes = new ObservableCollection<ColorPaletteVM>(ColorPalette.all_presets().Select(p => new ColorPaletteVM(p)));
            _show = backing(nameof(show), true);
@@ -334,26 +484,35 @@ namespace mbts.spark {
            _foreground = backing(nameof(foreground), Colors.Black);
            _background = backing(nameof(background), Colors.White);
            _font_display_name = backing(nameof(font_display_name),
-               () => TextUtils.display_name(font_family, font_weight, font_size), nameof(font_family), nameof(font_weight), nameof(font_size));
+               () => TextUtils.display_name(font_family, font_weight, font_size), new[] { nameof(font_family), nameof(font_weight), nameof(font_size) });
            _font_size.Changed += (oldval, newval) => font_size_changed?.Invoke(oldval, newval);
+            toggle_show_details_cmd = new DelegateCommand(() => {
+               show_details = !show_details;
+               RaisePropertyChanged(nameof(show_details));
+            });
         }

+         public event Action<double, double> font_size_changed;
+
         public string name { get; }
         public Typeface typeface { get => _typeface.Value; set => _typeface.Value = value; }
         public FontFamily font_family => _font_family.Value;
         public FontWeight font_weight => _font_weight.Value;
         public string font_display_name => _font_display_name.Value;
         public double font_size { get => _font_size.Value; set => _font_size.Value = value; }
-         public uint width { get; set; }
+         public uint width { get => _width; set => Set(ref _width, value); }
         public bool show { get => _show.Value; set => _show.Value = value; }
+         public bool can_toggle_show { get; }
+         public bool show_details { get; private set; }
         public Color foreground { get => _foreground.Value; set => _foreground.Value = value; }
         public Color background { get => _background.Value; set => _background.Value = value; }
         public ObservableCollection<ColorPaletteVM> foreground_palettes { get; }
         public ObservableCollection<ColorPaletteVM> background_palettes { get; }
-         public event Action<double, double> font_size_changed;
-
         public virtual string sample_text => "999-56789.01234";
-         string ITemplateSelectorKey.key => _can_toggle_visibility ? ui.spark.LadderSettingsView.ColumnVisibilityToggleTemplateKey : null;
+
+         public ICommand toggle_show_details_cmd { get; }
+
+         string ITemplateSelectorKey.key => _template_key;

         public void assign_from(LadderColumnSettings settings) {
            typeface = new Typeface(
@@ -366,7 +525,6 @@ namespace mbts.spark {
            show = settings.show;
            foreground = settings.foreground.rgb_color();
            background = settings.background.rgb_color();
-            RaisePropertyChanged(nameof(width), nameof(show));
         }

         public LadderColumnSettings get_settings() {
@@ -391,7 +549,7 @@ namespace mbts.spark {
         public Brush badge_border { get; } = new SolidColorBrush(BTSColors.MarketData.ask);
         public Brush badge_background { get; } = Brushes.White;

-         string ITemplateSelectorKey.key => ui.spark.LadderSettingsView.OrdersColumnSampleTemplateKey;
+         string ITemplateSelectorKey.key => ui.spark.LadderSettingsView.OrdersColumnTemplateKey;
      }

      public class LadderMarketBreakLineVM : ViewModelBase {
@@ -449,6 +607,7 @@ namespace mbts.spark {
            passive = new VolumeAtPriceAnimationVM("Passive", new VolumeAtPriceSampleData(this, 72, 127, 198));
            total = new VolumeAtPriceAnimationVM("Total", new VolumeAtPriceSampleData(this, 81, 100, 144));
            _any_visible = backing(nameof(any_visible), () => volume_components.Any(vc => vc.show_numbers || vc.bars.enabled));
+            _show_last_trade = backing(nameof(show_last_trade), false);
            foreach (var vc in volume_components) {
               vc.show_numbers_changed += _any_visible.refresh;
               vc.bars.enabled_changed += _any_visible.refresh;
@@ -458,11 +617,14 @@ namespace mbts.spark {
            }
         }

-         public LadderColumnSettingsVM general { get; } = new LadderColumnSettingsVM("Volume", true);
+         public LadderColumnSettingsVM general { get; } = new LadderColumnSettingsVM("Volume", LadderSettingsView.VolumeColumnTemplateKey, true);
         public VolumeAtPriceAnimationVM buy { get; }
         public VolumeAtPriceAnimationVM sell { get; }
         public VolumeAtPriceAnimationVM passive { get; }
         public VolumeAtPriceAnimationVM total { get; }
+
+         readonly Property<bool> _show_last_trade;
+         public bool show_last_trade { get => _show_last_trade.Value; set => _show_last_trade.Value = value; }
         public bool any_visible => volume_components.Any(vc => vc.show_numbers || vc.bars.enabled);

         public IEnumerable<VolumeAtPriceAnimationVM> volume_components {
@@ -481,6 +643,7 @@ namespace mbts.spark {
            sell.assign_from(settings.sell);
            passive.assign_from(settings.passive);
            total.assign_from(settings.total);
+            show_last_trade = settings.show_ltq;
         }

         public VolumeColumnSettings get_settings() =>
@@ -490,6 +653,7 @@ namespace mbts.spark {
               sell = sell.get_settings(),
               passive = passive.get_settings(),
               total = total.get_settings(),
+               show_ltq = show_last_trade
            };
      }

@@ -556,17 +720,15 @@ namespace mbts.spark {
      }

      public class FavoriteAlgosVM : DisposableViewModelBase, IValueFactoryVM<LadderFavoriteAlgosSettings> {
-         readonly ObservableKeyedCollection<AlgoDefinitionVM, AlgoKey> _algo_definitions = new ObservableKeyedCollection<AlgoDefinitionVM, AlgoKey>(d => d.key);
+         readonly IObservableCollection<AlgoDefinitionVM> _algo_definitions;
         readonly ObservableCollection<FavoriteAlgoItem> _raw_items = new ObservableCollection<FavoriteAlgoItem>();
         int _column_count = 2;

-         public FavoriteAlgosVM(OrdersModel model) {
+         public FavoriteAlgosVM(IObservableCollection<AlgoDefinitionVM> algo_definitions) {
+            _algo_definitions = algo_definitions;
            items = new ObservableAggregateCollection<FavoriteAlgoItem>(_raw_items, new ObservableCollection<FavoriteAlgoItem> { FavoriteAlgoItem.AddButtonPlaceholderItem });
            add_item_cmd = new DelegateCommand(() => _raw_items.Add(_item_factory()));
            remove_item_cmd = new DelegateCommand<FavoriteAlgoItem>(fai => _raw_items.Remove(fai));
-            _dispose = model.algo_model.definitions.OnDispatcher().Subscribe(update => {
-               AlgoCollectionHelper.update_persisted_definitions(_algo_definitions, update, d => AlgoDefinitionVM.create(model, d, false));
-            });
         }

         public ObservableCollection<FavoriteAlgoItem> items { get; }
@@ -586,11 +748,17 @@ namespace mbts.spark {
         }

         public LadderFavoriteAlgosSettings create() =>
-            new LadderFavoriteAlgosSettings(_raw_items.Where(fai => fai.algo_definition != null).Select(fai => fai.algo_definition.key).ToArray(), column_count);
+            new LadderFavoriteAlgosSettings(_raw_items
+               .Select(fai => fai.algo_definition?.key ?? fai.selector.desired_key)
+               .Where(k => k.HasValue && k.Value.is_persisted)
+               .Select(k => k.Value)
+               .ToArray(),
+               column_count);

         FavoriteAlgoItem _item_factory() =>
            new FavoriteAlgoItem(_algo_definitions, new ListCollectionView<AlgoDefinitionVM>(_algo_definitions) {
-               CustomSort = AlgoCollectionHelper.algo_definition_vm_comparer.to_non_generic()
+               CustomSort = AlgoCollectionHelper.algo_definition_vm_comparer.to_non_generic(),
+               Filter = obj => obj is AlgoDefinitionVM vm && vm.key.is_persisted
            });
      }

@@ -601,7 +769,7 @@ namespace mbts.spark {

         protected FavoriteAlgoItem() { }

-         public FavoriteAlgoItem(ObservableKeyedCollection<AlgoDefinitionVM, AlgoKey> algo_definitions, ICollectionView<AlgoDefinitionVM> algo_definitions_view) {
+         public FavoriteAlgoItem(IObservableCollection<AlgoDefinitionVM> algo_definitions, ICollectionView<AlgoDefinitionVM> algo_definitions_view) {
            selector = new KeyedItemSelector<AlgoDefinitionVM, AlgoKey>(this, nameof(algo_definition), algo_definitions, d => d.key);
            this.algo_definitions_view = algo_definitions_view;
         }
@@ -614,4 +782,4 @@ namespace mbts.spark {
         }
      }
   }
-} 
+} 
@@ -1,13 +1,11 @@
-using bts.api;
+using bts.api;
 using bts.api.orderman;
 using bts.shell;
 using bts.spark;
 using bts.utils;
 using mbts.co2;
-using mbts.persist;
 using mbts.ui;
 using mbts.ui.shell;
-using mbts.ui.utility;
 using mbts.utils;
 using System;
 using System.Collections.Generic;
@@ -25,40 +23,39 @@ namespace mbts.spark {

      readonly IBus _bus;
      readonly LadderModel _model;
-      readonly Property<double> _high, _low, _change, _open, _settlement, _position, _left_panel_width, _zoom_factor;
+      readonly Property<double> _high, _low, _change, _open, _settlement, _left_panel_width, _zoom_factor;
      //readonly Property<double> _window_width, _window_height;
      readonly Property<uint> _orders_column_width, _bid_column_width, _price_column_width, _ask_column_width, _last_column_width, _volume_column_width, _piq_column_width;
      readonly Property<ulong> _volume;
-      readonly Property<bool> _auto_clear, _show_day, _show_high, _show_low, _show_open, _show_settle, _show_volume, _show_account,
-         _show_tif, _show_order_type, _show_account_position, _show_size_preset, _show_auto_clear, _show_clear, _show_cancel_buys,
+      readonly Property<bool> _auto_clear;
+      readonly PropertyAutoWrapper<LadderSettings, bool> _show_day, _show_high, _show_low, _show_open, _show_settle, _show_volume, _show_account,
+         _show_tif, _show_order_type, _show_size_preset, _show_auto_clear, _show_clear, _show_cancel_buys,
         _show_cancel_sells, _show_cancel_all, _show_zoom;
-      readonly Property<Brush> _bid_background, _bid_foreground, _ask_background, _ask_foreground;
-      IWindowSettingsManager<LadderSettings> _settings_manager;
+      readonly PropertyAutoWrapper<LadderSettings, Brush> _bid_background, _bid_foreground, _ask_background, _ask_foreground;
+      double _position, _day_position;
+      bool _show_account_position, _show_day_position;
      ulong _misc_time = 0;
      ulong _last_trade_time = 0;
      IEqualityComparer<double> _equality;
      Dictionary<double, LadderOrderVM> _slot_price_vs_orders;
      IReadOnlyDictionary<uint, OrderSecurity> _cache = DictionaryHelper.empty<uint, OrderSecurity>();

-      public static LadderVM create(IBus bus, LadderModel model, IWindowSettingsManager<LadderSettings> settings_manager, LadderSettings init) {
-         var non_shared_wsm = settings_manager.as_non_shared();
-         return new LadderVM(bus, model, settings_manager, non_shared_wsm, init, new OrderPropertiesEditorVM(model.order_gateway, Observable.Return(model.security_md), settings_manager.subscribe_current().Select(s => new InlineOrderProperties(model.order_gateway, s))));
-      }
+      public static LadderVM create(IBus bus, LadderModel model, LadderSettings init, IObservable<LadderSettings> settings) =>
+         new LadderVM(bus, model, init, settings, new OrderPropertiesEditorVM(model.order_gateway, Observable.Return(model.security_md), settings.Select(s => new InlineOrderProperties(model.order_gateway, s))));

-      public static LadderVM create_readonly(IBus bus, LadderModel model) {
-         var default_settings = LadderSettings.Default;
-         return create_readonly(bus, model, new WindowSettingsManager<LadderSettings>.DisconnectedImpl(default_settings), default_settings);
-      }
+      public static LadderVM create_readonly(IBus bus, LadderModel model, IObservable<LadderSettings> settings) =>
+         create_readonly(bus, model, LadderSettings.Default, settings);

-      public static LadderVM create_readonly(IBus bus, LadderModel model, IWindowSettingsManager<LadderSettings> settings_manager, LadderSettings init) =>
-         new LadderVM(bus, model, settings_manager, settings_manager.as_non_shared(), init);
+      public static LadderVM create_readonly(IBus bus, LadderModel model, LadderSettings init, IObservable<LadderSettings> settings) =>
+         new LadderVM(bus, model, init, settings);

-      LadderVM(IBus bus, LadderModel model, IWindowSettingsManager<LadderSettings> settings_manager, IWindowSettingsManagerNonShared<LadderSettings> non_shared_wsm, LadderSettings init, OrderPropertiesEditorVM order_properties_vm = null) {
+      LadderVM(IBus bus, LadderModel model, LadderSettings init, IObservable<LadderSettings> settings, OrderPropertiesEditorVM order_properties_vm = null) {
         _bus = bus;
         _model = model;
+         current_settings = init;
+         this.settings = settings;
         _equality = TickUtils.tick_equality_comparer(_model.security.ContractSpec);
         _slot_price_vs_orders = new Dictionary<double, LadderOrderVM>(_equality);
-         _settings_manager = non_shared_wsm;
         this.order_properties_vm = order_properties_vm;
         _high = backing(nameof(high), double.NaN);
         _low = backing(nameof(low), double.NaN);
@@ -77,93 +74,82 @@ namespace mbts.spark {
         _left_panel_width = backing(nameof(left_panel_width), ws.order_entry_panel_width);
         _zoom_factor = backing(nameof(zoom_factor), ws.zoom_factor);
         // remember: account_positions needs to subscribe to selected_account; both the sub and account_positions need to be disposed
-         var account_positions = new KeyDrivenObservableSeries<string, double>(a => _model.order_gateway.security_total_position(security.Id, a));
-         _position = backing(nameof(position), account_positions.OnDispatcher());
         _volume = backing(nameof(volume), 0ul);
-         _auto_clear = backing(nameof(auto_clear), false);
+         _auto_clear = backing(nameof(auto_clear), init.auto_clear);
         _status = backing(nameof(status_message), "");
         _status_brush = backing(nameof(status_background), _transparent_status_brush);
-         // brush props
-         _bid_background = brush_prop(nameof(bid_background), s => s.bid_column.background.rgb_brush());
-         _bid_foreground = brush_prop(nameof(bid_foreground), s => s.bid_column.foreground.rgb_brush());
-         _ask_background = brush_prop(nameof(ask_background), s => s.ask_column.background.rgb_brush());
-         _ask_foreground = brush_prop(nameof(ask_foreground), s => s.ask_column.foreground.rgb_brush());
-         Property<Brush> brush_prop(string name, Func<LadderSettings, Brush> get_brush) =>
-            backing(name, settings_manager.subscribe_current().OnDispatcher(), get_brush);
-         // bool visibility props
-         _show_day = bool_prop(nameof(show_day), s => s.day_visible);
-         _show_high = bool_prop(nameof(show_high), s => s.high_visible);
-         _show_low = bool_prop(nameof(show_low), s => s.low_visible);
-         _show_open = bool_prop(nameof(show_open), s => s.open_visible);
-         _show_settle = bool_prop(nameof(show_settle), s => s.settle_visible);
-         _show_volume = bool_prop(nameof(show_volume), s => s.volume_visible);
-         _show_account = bool_prop(nameof(show_account), s => s.account_visible);
-         _show_tif = bool_prop(nameof(show_tif), s => s.tif_visible);
-         _show_order_type = bool_prop(nameof(show_order_type), s => s.order_type_visible);
-         _show_account_position = bool_prop(nameof(show_account_position), s => s.account_position_visible);
-         _show_size_preset = bool_prop(nameof(show_size_preset), s => s.size_presets_visible);
-         _show_auto_clear = bool_prop(nameof(show_auto_clear), s => s.auto_clear_visible);
-         _show_clear = bool_prop(nameof(show_clear), s => s.clear_visible);
-         _show_cancel_buys = bool_prop(nameof(show_cancel_buys), s => s.cancel_buys_visible);
-         _show_cancel_sells = bool_prop(nameof(show_cancel_sells), s => s.cancel_sells_visible);
-         _show_cancel_all = bool_prop(nameof(show_cancel_all), s => s.cancel_all_visible);
-         _show_zoom = bool_prop(nameof(show_zoom), s => s.zoom_slider_visible);
-
-         Property<bool> bool_prop(string name, Func<LadderSettings, bool> get_bool) =>
-            backing(name, settings_manager.subscribe_current().OnDispatcher(), get_bool);
+         // All settings observers should be aggregated together, so they can all share the same subscription to the settings
+         // (these subscriptions are not horribly expensive, but they're not free either - even more so with the .OnDispatcher() extension).
+         var settings_observer = new CompositeObserver<LadderSettings> {
+            /// first things first: assign our <see cref="current_settings"/>
+            (s => current_settings = s),
+            // brush props
+            (_bid_background = brush_prop(nameof(bid_background), s => s.bid_column.background)).set,
+            (_bid_foreground = brush_prop(nameof(bid_foreground), s => s.bid_column.foreground)).set,
+            (_ask_background = brush_prop(nameof(ask_background), s => s.ask_column.background)).set,
+            (_ask_foreground = brush_prop(nameof(ask_foreground), s => s.ask_column.foreground)).set,
+            // bool visibility props
+            (_show_day = bool_prop(nameof(show_day), s => s.day_visible)).set,
+            (_show_high = bool_prop(nameof(show_high), s => s.high_visible)).set,
+            (_show_low = bool_prop(nameof(show_low), s => s.low_visible)).set,
+            (_show_open = bool_prop(nameof(show_open), s => s.open_visible)).set,
+            (_show_settle = bool_prop(nameof(show_settle), s => s.settle_visible)).set,
+            (_show_volume = bool_prop(nameof(show_volume), s => s.volume_visible)).set,
+            (_show_account = bool_prop(nameof(show_account), s => s.account_visible)).set,
+            (_show_tif = bool_prop(nameof(show_tif), s => s.tif_visible)).set,
+            (_show_order_type = bool_prop(nameof(show_order_type), s => s.order_type_visible)).set,
+            (_show_size_preset = bool_prop(nameof(show_size_preset), s => s.size_presets_visible)).set,
+            (_show_auto_clear = bool_prop(nameof(show_auto_clear), s => s.auto_clear_visible)).set,
+            (_show_clear = bool_prop(nameof(show_clear), s => s.clear_visible)).set,
+            (_show_cancel_buys = bool_prop(nameof(show_cancel_buys), s => s.cancel_buys_visible)).set,
+            (_show_cancel_sells = bool_prop(nameof(show_cancel_sells), s => s.cancel_sells_visible)).set,
+            (_show_cancel_all = bool_prop(nameof(show_cancel_all), s => s.cancel_all_visible)).set,
+            (_show_zoom = bool_prop(nameof(show_zoom), s => s.zoom_slider_visible)).set,
+            s => {
+               if (Set(ref _show_account_position, s.account_position_visible, nameof(show_account_position)) | Set(ref _show_day_position, s.day_position_visible, nameof(show_day_position))) {
+                  RaisePropertyChanged(nameof(position_display_text));
+               }
+               size_calculator.buttons = s.calculator_buttons;
+               _auto_clear.set(s.auto_clear);
+               // column widths
+               _orders_column_width.set(s.orders_column.width);
+               _bid_column_width.set(s.bid_column.width);
+               _price_column_width.set(s.price_column.width);
+               _ask_column_width.set(s.ask_column.width);
+               _last_column_width.set(s.last_column.width);
+               _piq_column_width.set(s.piq_column.width);
+               _volume_column_width.set(s.volume_column.general.width);
+               // left panel/zoom
+               _left_panel_width.set(s.order_entry_panel_initial_width);
+               _zoom_factor.set(s.zoom_factor);
+            }
+         };
+         PropertyAutoWrapper<LadderSettings, bool> bool_prop(string name, Func<LadderSettings, bool> get_bool) =>
+            backing(name, init, get_bool, EqualityComparer.Create(get_bool));

+         PropertyAutoWrapper<LadderSettings, Brush> brush_prop(string name, Func<LadderSettings, uint> get_color_uint) =>
+            backing(name, init, s => get_color_uint(s).rgb_brush(), EqualityComparer.Create(get_color_uint));
         //
         //_window_height = backing(nameof(window_height), settings_manager.subscribe_current().OnDispatcher().Select(s => s.zoom_factor), (scale) => scale * 600);
         //_window_width = backing(nameof(window_width), settings_manager.subscribe_current().OnDispatcher().Select(s => s.zoom_factor), (scale) => scale * 420);
-         position_click_command = new DelegateCommand(() => size_calculator.value = DoubleHelper.safe_convert_to_uint(Math.Abs(position)));
-         send_order_command = new DelegateCommand<(double price, Side? side, bool size_from_alternate)>(send_order);
+         position_click_command = new DelegateCommand(() => size_calculator.value = DoubleHelper.safe_convert_to_uint(Math.Abs(_show_day_position ? day_position : position)));
+         send_order_command = new DelegateCommand<(double price, Side? side, MouseButton button)>(send_order);
         cancel_command = new AsyncCommand<LadderModel.CancelType>(_model.cancel_orders, true);
         show_book_command = new DelegateCommand(_show_book);
         show_ticket_command = new DelegateCommand(_show_ticket);
-         settings_command = new DialogCommand(() => {
-            var vm = new WindowSettingsDialogVM<LadderSettings, LadderSettingsVM>(
-               settings_manager, s => s.ladder, UserSettings.FileExtensions.LADDER,
-               s => {
-                  var svm = new LadderSettingsVM(model.order_gateway, security.ContractCase == Security.ContractOneofCase.Synthetic, () => left_panel_width, () => zoom_factor);
-                  svm.load(s);
-                  return svm;
-               }, s => s.with_window_specifics(get_save_state().get_window_specifics()));
-            var dialog = new ui.spark.SimpleGridSettingsDialog {
-               DataContext = vm,
-               Title = $"Ladder Settings - '{security}'"
-            };
-            vm.RequestClose += (s, e) => WindowUtilities.force_close(dialog);
-            return dialog;
-         }, -500, -500);
+         settings_command = new DelegateCommand(() => request_settings_dialog?.Invoke());

         orders = new ObservableCollection<LadderOrderVM>();

         _dispose = Disposable.Create(
-            settings_command,
-            non_shared_wsm,
+            settings.OnDispatcher().Subscribe(settings_observer),
            get_order_properties_editor_hooks(),
-            account_positions,
-            size_calculator = new CalculatorLogic(0, _settings_manager.subscribe_current().Select(s => s.calculator_buttons)),
            bus.subscribe(SparkTags.LogActivity).OnDispatcher().Subscribe(status_update),
            // we need to hook this up to model.orders which is filtered for just the security
-            model.order_gateway.working_orders_with_piq.OnDispatcher().Subscribe(working => {
+            model.orders.OnDispatcher().Subscribe(working => {
               // Here we manage N orders to 1 price slot in the ladder
               Dictionary<double, HashSet<uint>> orders_used_in_this_update = new Dictionary<double, HashSet<uint>>(_equality);
-
-               // In master we originally had something similar to this snippet to restrict the foreach to just the orders
-               // for this ladder. In 1944, at one point we made use of model.orders, which made use of the on_security_working_orders demuxer.
-               // When we merged PIQ into 1944, we moved from that demuxer to working_orders_with_piq, so we reintroduce this little snippet here
-               // to once again restrict the processing to those working orders that match the criteria. Check with John to see if we can
-               // make a demuxer from working_orders_with_piq, which is an IReadOnlyDictionary; that probably won't work, but I have no doubt
-               // there is a better way.
-               var ladders_orders =
-                  working.Values
-                  .Where(o =>
-                     o.order.Def.SecurityKey == security.Id &&
-                     (o.order.HasState && o.order.State.DisplayStatus == OrderState.Types.DisplayStatus.Visible))
-                  .ToReadOnlyDictionary(os => os.order.Key, os => os);
-                  
-               _cache = ladders_orders;
+               _cache = working.state;

               foreach (var os in _cache.Values) {
                  var wo = os.order;
@@ -180,9 +166,9 @@ namespace mbts.spark {
                  }

                  if (_slot_price_vs_orders.TryGetValue(slot_price_target, out LadderOrderVM slot_vm)) {
-                     slot_vm.add_order((wo, os.piq, os.meta));
+                     slot_vm.add_order((wo, os.piq, os.algo, os.meta));
                  } else {
-                     slot_vm = new LadderOrderVM((wo, os.piq, os.meta), slot_price_target, this, _bus, _settings_manager.subscribe_current().Select(s => s.badge_style));
+                     slot_vm = new LadderOrderVM((wo, os.piq, os.algo, os.meta), slot_price_target, this, _bus, settings.Select(s => s.badge_style).OnDispatcher());
                     _slot_price_vs_orders[slot_price_target] = slot_vm;
                  }

@@ -229,24 +215,39 @@ namespace mbts.spark {
            WorkLoop.Start($"Ladder '{security}'", _tick),
            Disposable.Create(() => _on_disposed_impl?.Invoke(true))
         );
-         IDisposable get_order_properties_editor_hooks() =>
-            order_properties_vm == null ?
-               Disposable.empty :
-               Disposable.Create(
-                  settings.OnDispatcher().Subscribe(s => order_properties_vm.on_favorite_algos(s.favorite_algos)),
-                  order_properties_vm,
-                  order_properties_vm.observe_account(true).Select(a => a?.name ?? string.Empty).Subscribe(account_positions));
+         IDisposable get_order_properties_editor_hooks() {
+            if (order_properties_vm == null)
+               return Disposable.empty;
+            var position_src = order_properties_vm.observe_account(true)
+               .Select(a => a?.name ?? string.Empty)
+               .SelectManyInSeries(a => _model.order_gateway.on_security_positions(security.Id)
+                  .Select(table => table.state.Values.FirstOrDefault(pos => pos.Item2.Account == a, tup => tup.Item2, (bts.api.position.PositionUnitImmutable?)null)));
+            return Disposable.Create(
+               settings.OnDispatcher().Subscribe(s => order_properties_vm.on_favorite_algos(s.favorite_algos)),
+               order_properties_vm,
+               position_src.OnDispatcher().Subscribe(pos => {
+                  double total, day;
+                  if (pos.HasValue) {
+                     total = pos.Value.total_pos();
+                     day = pos.Value.day_pos();
+                  } else {
+                     total = day = double.NaN;
+                  }
+                  if ((Set(ref _position, total, nameof(position)) | Set(ref _day_position, day, nameof(day_position))) && (show_day_position || show_account_position))
+                     RaisePropertyChanged(nameof(position_display_text));
+               }));
+         }
      }

      public IBus bus => _bus;

-      public event Action on_tick;
+      public event Action on_tick, request_settings_dialog, settings_invalidated;

      public MDConsumerHandle md => _model.md;
      // we return only entries who have piqs and whose piqs are not uint.Max
      // uint.Max happens when the server is restarted but the client is still up
      // maybe long term we don't show this data while the exchange connection is down
-      public IEnumerable<(double, uint)> price_vs_piq => _slot_price_vs_orders.Values.Where(result => result.min_piq.HasValue && result.min_piq.Value != uint.MaxValue).Select(o => (o.price, o.min_piq.Value));  
+      public IEnumerable<(double, uint)> price_vs_piq => _slot_price_vs_orders.Values.Where(result => result.min_piq.HasValue && result.min_piq.Value != uint.MaxValue).Select(o => (o.price, o.min_piq.Value));
      public bool is_synthetic => _model.security.ContractCase == Security.ContractOneofCase.Synthetic;

      Property<string> _status;
@@ -275,15 +276,17 @@ namespace mbts.spark {
         remove => _on_disposed_impl -= value;
      }
      public SecurityImmutable security => _model.security;
+      public LadderSettings current_settings { get; private set; }
      public double high => _high.Value;
      public double low => _low.Value;
      public double change => _change.Value;
      public double open => _open.Value;
      public double settlement => _settlement.Value;
-      public double position => _position.Value;
+      public double position => _position;
+      public double day_position => _day_position;
      public ulong volume => _volume.Value;
      public bool auto_clear { get => _auto_clear.Value; set => _auto_clear.set(value); }
-      public CalculatorLogic size_calculator { get; }
+      public CalculatorLogic size_calculator { get; } = new CalculatorLogic(0);
      /// Important: <see cref="order_properties_vm"/> can be null.
      public OrderPropertiesEditorVM order_properties_vm { get; }
      public ObservableCollection<LadderOrderVM> orders { get; }
@@ -291,30 +294,41 @@ namespace mbts.spark {
      public ICommand send_order_command { get; }
      public ICommand show_book_command { get; }
      public ICommand show_ticket_command { get; }
-      public Brush bid_background => _bid_background.Value;
-      public Brush bid_foreground => _bid_foreground.Value;
-      public Brush ask_background => _ask_background.Value;
-      public Brush ask_foreground => _ask_foreground.Value;
-      public DialogCommand settings_command { get; }
-      public bool show_day { get => _show_day.Value; set => _show_day.set(value); }
-      public bool show_high { get => _show_high.Value; set => _show_high.set(value); }
-      public bool show_low { get => _show_low.Value; set => _show_low.set(value); }
-      public bool show_open { get => _show_open.Value; set => _show_open.set(value); }
-      public bool show_settle { get => _show_settle.Value; set => _show_settle.set(value); }
-      public bool show_volume { get => _show_volume.Value; set => _show_volume.set(value); }
-      public bool show_account { get => _show_account.Value; set => _show_account.set(value); }
-      public bool show_tif { get => _show_tif.Value; set => _show_tif.set(value); }
-      public bool show_order_type { get => _show_order_type.Value; set => _show_order_type.set(value); }
-      public bool show_account_position { get => _show_account_position.Value; set => _show_account_position.set(value); }
-      public bool show_size_preset { get => _show_size_preset.Value; set => _show_size_preset.set(value); }
-      public bool show_auto_clear { get => _show_auto_clear.Value; set => _show_auto_clear.set(value); }
-      public bool show_clear { get => _show_clear.Value; set => _show_clear.set(value); }
-      public bool show_cancel_buys { get => _show_cancel_buys.Value; set => _show_cancel_buys.set(value); }
-      public bool show_cancel_sells { get => _show_cancel_sells.Value; set => _show_cancel_sells.set(value); }
-      public bool show_cancel_all { get => _show_cancel_all.Value; set => _show_cancel_all.set(value); }
-      public bool show_zoom { get => _show_zoom.Value; set => _show_zoom.set(value); }
+      public ICommand settings_command { get; }
+      public Brush bid_background => _bid_background.view;
+      public Brush bid_foreground => _bid_foreground.view;
+      public Brush ask_background => _ask_background.view;
+      public Brush ask_foreground => _ask_foreground.view;
+      public bool show_day => _show_day.view;
+      public bool show_high => _show_high.view;
+      public bool show_low => _show_low.view;
+      public bool show_open => _show_open.view;
+      public bool show_settle => _show_settle.view;
+      public bool show_volume => _show_volume.view;
+      public bool show_account => _show_account.view;
+      public bool show_tif => _show_tif.view;
+      public bool show_order_type => _show_order_type.view;
+      public bool show_account_position => _show_account_position;
+      public bool show_day_position => _show_day_position;
+      public bool show_size_preset => _show_size_preset.view;
+      public bool show_auto_clear => _show_auto_clear.view;
+      public bool show_clear => _show_clear.view;
+      public bool show_cancel_buys => _show_cancel_buys.view;
+      public bool show_cancel_sells => _show_cancel_sells.view;
+      public bool show_cancel_all => _show_cancel_all.view;
+      public bool show_zoom => _show_zoom.view;
      public double left_panel_width { get => _left_panel_width.Value; set => _left_panel_width.set(value); }
      public double zoom_factor { get => _zoom_factor.Value; set => _zoom_factor.set(value); }
+      public string position_display_text {
+         get {
+            if (show_day_position) {
+               string day_pos_text = SparkUtils.fmt_position(day_position);
+               return show_account_position ? $"{day_pos_text} ({SparkUtils.fmt_position(position)})" : day_pos_text;
+            } else if (show_account_position) {
+               return SparkUtils.fmt_position(position);
+            } else return string.Empty;
+         }
+      }
      //public double window_height { get => _window_height.Value; set => _window_height.set(value); }
      //public double window_width { get => _window_width.Value; set => _window_width.set(value); }
      public uint orders_column_width { get => _orders_column_width.Value; set => _orders_column_width.set(value); }
@@ -324,9 +338,11 @@ namespace mbts.spark {
      public uint last_column_width { get => _last_column_width.Value; set => _last_column_width.set(value); }
      public uint piq_column_width { get => _piq_column_width.Value; set => _piq_column_width.set(value); }
      public uint volume_column_width { get => _volume_column_width.Value; set => _volume_column_width.set(value); }
+      public uint alternate_order_size_from_settings => current_settings.alternate_order_size;
+      public bool show_warn_on_cross_from_settings => current_settings.show_warn_on_cross;
      internal LadderModel model => _model;
-      internal IObservable<LadderSettings> settings => _settings_manager.subscribe_current();
-      internal OrderRecordImmutable get_root_at_price((OrderRecordImmutable order, uint? _, AlgoDefinitionMetadata? meta) op) {
+      internal IObservable<LadderSettings> settings { get; }
+      internal OrderRecordImmutable get_root_at_price((OrderRecordImmutable order, uint? _, AlgoData? __, AlgoDefinitionMetadata? meta) op) {
         var order = op.order;
         double p = order.price();
         foreach (var o in lineage(order.ParentKey)) {
@@ -344,10 +360,26 @@ namespace mbts.spark {
      }

      public LadderSettings get_save_state() {
-         var state = _settings_manager.current_settings();
-         state = state.with_window_specifics(new LadderSettings.WindowSpecifics(left_panel_width, orders_column_width, bid_column_width, price_column_width, ask_column_width, last_column_width, volume_column_width, zoom_factor, piq_column_width));
-         state.use_defaults = _settings_manager.instance_settings == null;
-         return state;
+         var rv = current_settings.with_window_specifics(
+            new LadderSettings.WindowSpecifics(
+               left_panel_width,
+               orders_column_width,
+               bid_column_width,
+               price_column_width,
+               ask_column_width,
+               last_column_width,
+               volume_column_width,
+               zoom_factor,
+               piq_column_width));
+         rv.auto_clear = auto_clear;
+         if (order_properties_vm != null) {
+            rv.default_time_in_force = order_properties_vm.selected_time_in_force;
+            if (order_properties_vm.selected_account.HasValue)
+               rv.default_account = order_properties_vm.selected_account.Value.id;
+            if (order_properties_vm.selected_algo_definition != null)
+               rv.default_algo = AlgoID.from_algo_key(order_properties_vm.selected_algo_definition.key, _model.order_gateway.dynamic_helper.dynamic_type_index);
+         }
+         return rv;
      }

      public void key_down(KeyEventArgs e) {
@@ -362,34 +394,45 @@ namespace mbts.spark {
         }
      }

-      public async void send_order((double price, Side? side, bool size_from_alternate) args) {
-         if (order_properties_vm == null)
+      public void on_mini_orderbook_closed(bts.shell.orderbook.OrderBookStartupData ob_state) {
+         current_settings = SparkUtils.clone_proto(current_settings);
+         current_settings.mini_ob = new LadderMiniOrderBookSettings(ob_state.orderbook_grid.general);
+         settings_invalidated?.Invoke();
+      }
+
+      public void send_order((double price, Side? side, MouseButton button) args) {
+         if (order_properties_vm == null || args.button == MouseButton.Middle)
            return;
-         var s = _settings_manager.current_settings();
-         if (DoubleHelper.IsNaNOrInfinity(args.price) || !args.side.HasValue || HasErrors || order_properties_vm.HasErrors || (args.size_from_alternate && s.alternate_order_size == 0))
+         var size_from_alternate = args.button == MouseButton.Right;
+         if (DoubleHelper.IsNaNOrInfinity(args.price) || !args.side.HasValue || HasErrors || order_properties_vm.HasErrors || (size_from_alternate && current_settings.alternate_order_size == 0)) {
            return;
-         else if (!args.size_from_alternate && (!size_calculator.value.HasValue || size_calculator.value.Value == 0)) {
-            size_calculator.flash_error();
-         } else {
-            var order = order_properties_vm.create(args.side.Value);
-            if (order.CustomDef != null) {
-               if (order.CustomDef.Stop != null) {
-                  order.CustomDef.Stop.StopPrice = args.price;
-               } else if (order.CustomDef.StopLimit != null) {
-                  // swap the prices here so that the level clicked
-                  // in the ladder is the StopPrice (trigger) and the Price
-                  // is what was specificed in the extra parameter box
-                  double temp_price = order.CustomDef.StopLimit.StopPrice;
-                  order.CustomDef.StopLimit.StopPrice = args.price;
-                  args.price = temp_price;
-               }
-            }
-               
-            uint size = args.size_from_alternate ? s.alternate_order_size : (uint)Math.Abs(size_calculator.value.Value);
-            await _model.order_gateway.send_order(order, args.price, size);
-            if (auto_clear)
-               size_calculator.value = 0;
         }
+         if (!size_from_alternate && (!size_calculator.value.HasValue || size_calculator.value.Value == 0)) {
+            size_calculator.flash_error();
+         }
+         else {
+            uint size = size_from_alternate ? current_settings.alternate_order_size : (uint)Math.Abs(size_calculator.value ?? 0);
+            send_order_async(args.side.Value, size, args.price).ignore();
+         }
+      }
+
+      public async Task send_order_async(Side side, uint size, double price) {
+         var order = order_properties_vm.create(side);
+         if (order.CustomDef != null) {
+            if (order.CustomDef.Stop != null) {
+               order.CustomDef.Stop.StopPrice = price;
+            } else if (order.CustomDef.StopLimit != null) {
+               // swap the prices here so that the level clicked
+               // in the ladder is the StopPrice (trigger) and the Price
+               // is what was specificed in the extra parameter box
+               double temp_price = order.CustomDef.StopLimit.StopPrice;
+               order.CustomDef.StopLimit.StopPrice = price;
+               price = temp_price;
+            }
+         }
+         await _model.order_gateway.send_order(order, price, size);
+         if (auto_clear)
+            size_calculator.value = 0;
      }

      void _update_header() {
@@ -413,12 +456,13 @@ namespace mbts.spark {

      }

-      void _show_book() =>
-        _bus.post(SparkTags.ShowOrderBookTag, new bts.shell.orderbook.OrderBookStartupData {
-           filters = new bts.shell.orderbook.FilterStates {
-              security_criteria = new SecurityCriteria(security)
-           }
-        });
+      void _show_book() {
+         var ob_settings = bts.shell.orderbook.OrderBookStartupData.Default;
+         ob_settings.filters = new bts.shell.orderbook.FilterStates {
+            security_criteria = new SecurityCriteria(security)
+         };
+         _bus.post(SparkTags.ShowOrderBookTag, ob_settings);
+      }

      void _show_ticket() {
         if (order_properties_vm != null)
@@ -0,0 +1,58 @@
+using bts.api;
+using bts.api.orderman;
+using mbts.ui.shell;
+using System;
+using System.Collections.Generic;
+using System.Reactive.Linq;
+
+namespace mbts.spark {
+   class LadderVMContainer : ViewModelBase, IDisposable {
+      readonly IBus _bus;
+      readonly OrdersModel _model;
+      LadderVM _value;
+      SecurityMD? _security_md;
+      HashSet<uint> _selected_order_tree = new HashSet<uint>();
+
+      public LadderVMContainer(IBus bus, OrdersModel model) {
+         _bus = bus;
+         _model = model;
+      }
+
+      public SecurityMD? security_md {
+         get => _security_md;
+         set {
+            if (_security_md != value) {
+               _security_md = value;
+               _reset_ladder_vm();
+               RaisePropertyChanged(nameof(security_md), nameof(LadderVMContainer.value));
+            }
+         }
+      }
+      public LadderVM value => _value;
+
+      public void Dispose() {
+         if (_value != null) {
+            _value.Dispose();
+            _value = null;
+            RaisePropertyChanged(nameof(value));
+         }
+      }
+
+      public void set_orders(IEnumerable<uint> orders) {
+         _selected_order_tree = new HashSet<uint>(orders);
+         _reset_ladder_vm();
+      }
+
+      void _reset_ladder_vm() {
+         if (_value == null && !_security_md.HasValue)
+            return;
+         Disposable.replace(ref _value,
+            _security_md.HasValue ?
+               LadderVM.create_readonly(_bus,
+                  new LadderModel(security_md.Value, _model, _model.mbo_service,
+                  new Func<OrderSecurity, bool>(osec => _selected_order_tree.Contains(osec.order.Key))),
+                  Observable.Return(LadderSettings.sanitize(LadderSettings.Default))) : null);
+         RaisePropertyChanged(nameof(value));
+      }
+   }
+}
@@ -8,6 +8,7 @@ using mbts.ui;
 using mbts.ui.controls;
 using mbts.ui.extensions;
 using mbts.ui.spark;
+using mbts.ui.spark.algo;
 using mbts.ui.utility.text;
 using mbts.utils;
 using System;
@@ -17,8 +18,10 @@ using System.Collections.ObjectModel;
 using System.Collections.Specialized;
 using System.Linq;
 using System.Reactive.Linq;
+using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
 using System.Windows.Input;
 using System.Windows.Media;
 using System.Windows.Media.Animation;
@@ -56,13 +59,19 @@ namespace mbts.spark {
      LadderTactileAdorner _tactile_adorner;
      ulong _prices_updated;
      NativePriceSize[] _bids = new NativePriceSize[NativePriceHelpers.COCONUT_MAX_DEPTH], _asks = new NativePriceSize[NativePriceHelpers.COCONUT_MAX_DEPTH];
-      bool _price_dirty = false;
+      bool _price_dirty = false, _piq_dirty = false;
      double[] _price_list = null;
      IComparer<double> _price_comparer;
      double _last_origin_price;
      MarketBreakLines _mkt_break_lines;
      NativePriceSize _last_trade;
      Func<NativePriceSize, string> _fmt_size = MDDisplayHelper.get_formatter_nps(MarketSizeDisplay.get_default());
+      int _old_tooltip_row = int.MaxValue;
+      NativePriceSize? _old_last_trade;
+      string _direction_arrow = string.Empty;
+      bool _tooltips_are_hooked_up = false;
+      ToolTip tooltip_view = new ToolTip();
+      IDisposable _parameterized_order_popup;

      public LadderGridHost() {
         AllowDrop = true;
@@ -257,11 +266,15 @@ namespace mbts.spark {
            case NotifyCollectionChangedAction.Add:
               foreach (LadderOrderVM item in e.NewItems) {
                  _ordershost.add_order(item);
+                  item.piq_changed += _set_piq_dirty;
+                  _set_piq_dirty();
               }
               break;
            case NotifyCollectionChangedAction.Remove:
               foreach (LadderOrderVM item in e.OldItems) {
                  _ordershost.remove_order(item);
+                  item.piq_changed -= _set_piq_dirty;
+                  _set_piq_dirty();
               }
               break;
            case NotifyCollectionChangedAction.Reset:
@@ -272,6 +285,9 @@ namespace mbts.spark {
               throw new NotImplementedException();
         }
      }
+
+      void _set_piq_dirty() { _piq_dirty = true; }
+
      #endregion

      Column[] columns { get; set; } = new Column[0];
@@ -309,27 +325,156 @@ namespace mbts.spark {
      }

      protected override async void OnMouseDown(MouseButtonEventArgs e) {
+         if (_settings == null || e.Handled)
+            return;
         Keyboard.ClearFocus();
         Focus();
         var point = e.GetPosition(this);
         var column = _column_for_point(point);
-         if (column.column_type == ColumnType.Price && e.ChangedButton == MouseButton.Middle)
-            _scroll_to_center();
-         else if (_settings != null) {
-            var price = price_for_point(point);
-            Side? bs = null;
-            if (column.column_type == ColumnType.Bid) bs = Side.Buy;
-            if (column.column_type == ColumnType.Ask) bs = Side.Sell;
-            var pbs = (price, bs, e.ChangedButton == MouseButton.Right);
-            if (Command != null && Command.CanExecute(pbs)) {
-               if (bs.HasValue) {
-                  using (_tactile_adorner.show_busy(_row_for_point(point), bs.Value == Side.Buy ? ColumnType.Bid : ColumnType.Ask))
-                     await Command.ExecuteAsync(pbs);
-               } else
-                  Command.Execute(pbs);
+         var price = price_for_point(point);
+         Side? bs = null;
+         if (column.column_type == ColumnType.Bid) bs = Side.Buy;
+         if (column.column_type == ColumnType.Ask) bs = Side.Sell;
+         if (e.ChangedButton == MouseButton.Middle) {
+            if (bs.HasValue) {
+               _send_parameterized_order(point, bs.Value);
+               return;
+            } else if (column.column_type == ColumnType.Price) {
+               if (Keyboard.IsKeyDown(Key.LeftShift) || Keyboard.IsKeyDown(Key.RightShift) ||
+                   Keyboard.IsKeyDown(Key.LeftAlt) || Keyboard.IsKeyDown(Key.RightAlt)) {
+                  show_mbo_popup(point).ignore();
+               } else {
+                  _scroll_to_center();
+               }
+               return;
+            }
+         } else if (_vm != null) {
+            uint size = e.ChangedButton == MouseButton.Right ? _vm.alternate_order_size_from_settings : _vm.size_calculator.value ?? 0;
+            // if warning enabled && (buy above opposite inside market || ask below opposite inside market)
+            // when 1-sided market, _get_top_price will return NaN, and so the price comparison is false
+            // meaning show no warning == correct
+            if (_vm.show_warn_on_cross_from_settings &&
+               (size > 0) &&
+               ((bs == Side.Buy && price >= _get_top_price(_asks)) || (bs == Side.Sell && price <= _get_top_price(_bids)))) {
+               string prompt = $"Are you sure you want to CROSS the market to {bs.ToString().ToUpper()} {size} @ {security.spec_or_default().format(price)} ?";
+               if (!BTSMessageBox.Confirm(prompt, "Cross Market Alert", MessageBoxImage.Warning)) {
+                  return;
+               }
            }
         }
-         base.OnMouseDown(e);
+         var pbs = (price, bs, e.ChangedButton);
+         if (Command is ICommand cmd && cmd.CanExecute(pbs)) {
+            if (bs.HasValue) {
+               using (_tactile_adorner.show_busy(_row_for_point(point), bs.Value == Side.Buy ? ColumnType.Bid : ColumnType.Ask))
+                  await cmd.ExecuteAsync(pbs);
+            } else {
+               cmd.Execute(pbs);
+            }
+         }
+      }
+
+      void _send_parameterized_order(Point point, Side side) {
+         Disposable.dispose(ref _parameterized_order_popup);
+         if (side == Side.Undefined)
+            throw new ArgumentException("Side is undefined.", nameof(side));
+         if (!(_vm.size_calculator.value is uint size) || size == 0 || !(_vm.order_properties_vm?.selected_algo_definition?.algo_root?.can_expand ?? false))
+            return;
+         double price = _price_for_row(_row_for_point(point));
+         var grid = new Grid { DataContext = _vm };
+         grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Star) });
+         grid.RowDefinitions.Add(new RowDefinition { Height = GridLength.Auto });
+         var close_cmd = new DelegateCommand(() => Disposable.dispose(ref _parameterized_order_popup));
+         var send_order_cmd = new DelegateCommand(send_order);
+         LadderColumnSettings lcs = side == Side.Buy ? _settings.bid_column : _settings.ask_column;
+         grid.Children.Add(new AlgoParamsView { DataContext = _vm });
+         // dialog skirt
+         var dialog_skirt = new DialogSkirt {
+            RightItems = new[] {
+               new Button {
+                  Background = lcs.background.rgb_brush(),
+                  Command = send_order_cmd,
+                  Content = $"{side} @ {security.spec_or_default().format(price)}",
+                  Foreground = lcs.foreground.rgb_brush(),
+                  Margin = new Thickness(4, 0, 4, 0),
+                  Height = 22
+               },
+               new Button {
+                  Content = "Cancel",
+                  Command = close_cmd,
+                  Margin = new Thickness(4, 0, 4, 0),
+                  Height = 22
+               }
+            }
+         };
+         Grid.SetRow(dialog_skirt, 1);
+         grid.Children.Add(dialog_skirt);
+         // root
+         var root = new Border {
+            Background = BTSColors.common_background_brush,
+            BorderBrush = Brushes.DarkGray,
+            BorderThickness = new Thickness(1),
+            Child = grid
+         };
+         // popup
+         var popup = new Popup {
+            Child = root,
+            PlacementTarget = this,
+            PlacementRectangle = new Rect(point, point),
+            StaysOpen = false
+         };
+         popup.Closed += on_closed;
+         root.Loaded += (s, e) => {
+            if (_parameterized_order_popup == null)
+               _parameterized_order_popup = Disposable.Create(() => popup.IsOpen = false);
+         };
+         popup.PreviewMouseDown += (s, e) => {
+            if (e.ChangedButton == MouseButton.Middle) {
+               e.Handled = true;
+               Disposable.dispose(ref _parameterized_order_popup);
+            }
+         };
+         popup.IsOpen = true;
+         // local methods
+         void send_order() {
+            // Double check that size hasn't changed (if it has, do NOT send anything).
+            // While this should be impossible, sending an order with an unexpected size is dangerous enough to warrant redunant checks.
+            if (_vm.size_calculator.value == size) {
+               _vm.send_order_async(side, size, price).ignore();
+            } else {
+               Log.Ui.warn($"Parameterized algo popup '{side}' order was deliberately ignored by the ui: the 'quantity' box value changed during the lifetime of the popup (was {size} when the popup was first opened; currently is {_vm.size_calculator.value}).");
+            }
+            Disposable.dispose(ref _parameterized_order_popup);
+         }
+         void on_closed(object sender, EventArgs e) =>
+            _vm.order_properties_vm.algo_param_rows.revert_all();
+      }
+
+      private async Task show_mbo_popup(Point point) {
+         var query = MBOPopupModel.default_query.with(
+            security_id: _vm.model.security.Id,
+            price_level: price_for_point(point)
+         );
+         var model = new MBOPopupModel(_vm.model.mbo_service, _vm.model.security, query);
+         // Load the first set of orders so we know if there are any before showing the popup
+         var result = await model.load_orders();
+         if (result.success && result.value.orders.Count > 0) {
+            var view = new MBOPopupView(model, result.value);
+            var popup = new AutoClosePopup {
+               PlacementTarget = this,
+               PlacementRectangle = new Rect(point, point),
+               IsOpen = true,
+               Child = new Border {
+                  BorderBrush = Brushes.Black,
+                  BorderThickness = new Thickness(0.5),
+                  Child = new ScrollViewer {
+                     VerticalScrollBarVisibility = ScrollBarVisibility.Hidden,
+                     HorizontalScrollBarVisibility = ScrollBarVisibility.Disabled,
+                     Content = view,
+                  }
+               }
+            };
+            view.RequestClose += (o, _) => popup.IsOpen = false;
+         }
      }

      protected override void OnMouseDoubleClick(MouseButtonEventArgs e) {
@@ -368,6 +513,18 @@ namespace mbts.spark {
      uint? _ask_size_from_row(int row) =>
         _size_from_row(row, _price_list, _asks, _vm.security.ContractSpec);

+      uint _volume_from_row(int row) {
+         if (_price_list != null) {
+            var price = _price_list[row];
+            var vapls = _volume_container.read_new_value();
+            if (vapls != null) {
+               return vapls.SelectFirstOrDefault(v => MathUtils.epsilon_equals(v.Price, price), v => v.Volume);
+            } 
+         }
+         return 0u;
+      }
+
+
      int _row_for_price(double price) => LadderRender.index_of(_price_list, price, _price_comparer);
      #endregion

@@ -485,6 +642,7 @@ namespace mbts.spark {
            _prices_updated = 0;
            _price_comparer = Comparer<double>.Create((x, y) => security.ContractSpec.tick_equals(x, y) ? 0 : y.CompareTo(x));
            _price_dirty = true;
+            _piq_dirty = true;
            _vm.on_tick += _tick;
            _settings_sub = _vm.settings.OnDispatcher().Subscribe(_settings_updated);
            _volume_sub = _vm.model.order_gateway.md_auxiliary_model.security_volume_at_price(security.Id).Subscribe(t => _volume_container.write_value(t.state.Values));
@@ -492,6 +650,72 @@ namespace mbts.spark {
         }
      }

+      #region tooltip handling
+      void _toggle_tooltips() {
+         if (_tooltips_are_hooked_up && !_settings.volume_column.show_ltq) {
+            this.MouseMove -= _mouse_move_handler;
+            _tooltips_are_hooked_up = false;
+            _hide_tool_tip();
+            // somehow even after hiding an unhooking the event handler, after toggling the setting off and 
+            // then hovering over the Volume column, the tooltip will still display, so we explicitly set it
+            // to null here.
+            this.ToolTip = null;
+         }
+
+         if (_settings.volume_column.show_ltq && !_tooltips_are_hooked_up) {
+            this.MouseMove += _mouse_move_handler;
+            _tooltips_are_hooked_up = true;
+         }
+      }
+
+      void _mouse_move_handler(object sender, MouseEventArgs e) {
+         var pt = e.GetPosition(this);
+         if (_column_for_point(pt)?.column_type == ColumnType.Volume) {
+            var row = _row_for_point(pt);
+            // mark dirty so that we'll always get a value on our read
+            _volume_container.mark_dirty();
+            var volume = _volume_from_row(row);
+            if (volume > uint.MinValue && row != _old_tooltip_row) {
+               if (tooltip_view.IsOpen) {
+                  _old_tooltip_row = row;
+                  // we've changed rows, so hide the old tooltip
+                  //System.Diagnostics.Debug.WriteLine("   Tooltip - Previous tooltip is visible, but we've changed rows");
+                  _hide_tool_tip();
+               }
+
+               tooltip_view.Content = $"{volume}";
+               tooltip_view.IsOpen = true;
+               this.ToolTip = tooltip_view;
+            } else {
+               // got 0 volume or we're over the same row
+               if (volume == uint.MinValue) {
+                  // The latest volume query resulted in a 0 volume
+                  // Perhaps we read it too quickly, or perhaps we are on a row where there is no volume
+                  // At any rate, we need this part hiding the tooltip so that we don't leave random tooltips around
+                  // and we have to reset to old row so that when we go back to what could be our preivous row, the tooltip gets drawn again
+                  //System.Diagnostics.Debug.WriteLine("   Tooltip - Volume is 0");
+                  _old_tooltip_row = int.MaxValue;
+                  _hide_tool_tip();
+                  //_old_tooltip_row = Int32.MaxValue;
+               }
+            }
+         } else {
+            //System.Diagnostics.Debug.WriteLine("   Tooltip - not over Volume column");
+            _old_tooltip_row = int.MaxValue;
+            _hide_tool_tip();
+         }
+      }
+      void _hide_tool_tip() {
+         // I am leaving this here for posterity
+         // Apparently even when setting IsOpen to false first and then setting Content to null afterward,
+         // the tooltip will *still* display as empty for a brief moment, which looks odd. So, we just hide it now.
+         tooltip_view.IsOpen = false;
+         //tooltip_view.Content = null;
+      }
+
+      #endregion
+
+
      void _on_vm_disposed(bool obj) =>
         _dispose_resources();

@@ -580,8 +804,10 @@ namespace mbts.spark {
               if (depth_changed)
                  _refresh_sizes();
            }
-            // TODO - detect changes in PIQ to selectively redraw
-            _refresh_piq();
+            if (_piq_dirty) {
+               _refresh_piq();
+               _piq_dirty = false;
+            }
            _refresh_volume_at_price();
            _last_origin_price = _mkt_break_lines.origin;
            _price_dirty = false;
@@ -622,8 +848,7 @@ namespace mbts.spark {
         if (!_settings.piq_column.show)
            return;
         int origin_index = LadderRender.index_of(_price_list, _mkt_break_lines.origin, _price_comparer);
-         var piq_list = _vm.price_vs_piq;
-         LadderRender.render_piqs(_piq_vis_tup.visual, _last_vis_tup.glyph_context, origin_index, _price_list, piq_list.ToArray(), _settings.row_height, security.ContractSpec, _settings.piq_column);
+         LadderRender.render_piqs(_piq_vis_tup.visual, _last_vis_tup.glyph_context, origin_index, _price_list, _vm.price_vs_piq, _settings.row_height, security.ContractSpec, _settings.piq_column);
      }

      void _refresh_sizes() {
@@ -639,10 +864,43 @@ namespace mbts.spark {
      void _refresh_volume_at_price() {
         if (!_settings.volume_column.general.show)
            return;
+
+         // if the last trade has a new size then we need to explicitly
+         // mark the volume container as dirty because there is a chance
+         // we have arrived here off a size change and not a volume change
+         // or a random change, like applying new settings
+         bool last_trade_size_changed = _old_last_trade.HasValue ? _last_trade.size != _old_last_trade.Value.size : true;
+         if (last_trade_size_changed && _settings.volume_column.show_ltq) {
+            _volume_container.mark_dirty();
+         }
         var vapls = _volume_container.read_new_value();
         if (vapls != null) {
            Log.assert_d(_price_list != null);
-            LadderRender.render_volumes(_volume_vis_tup.visual, _volume_vis_tup.glyph_context, _price_list, vapls, _settings.row_height, security.ContractSpec, _settings.volume_column);
+            var last_index = LadderRender.index_of(_price_list, _last_trade.price, _price_comparer);
+            LadderRender.render_volumes(_volume_vis_tup.visual, _volume_vis_tup.glyph_context, _price_list, vapls, _settings.row_height, security.ContractSpec, _settings.volume_column, last_index, _get_last_arrow_string());
+            _old_last_trade = _last_trade;
+         }
+
+         string _get_last_arrow_string() {
+            // if _old_last_trade doesn't have a value, this is the first time the ladder has been launched
+            // and so the direction should be drawn without an arrow since there is no basis for comparison
+            if (!_old_last_trade.HasValue) {
+               _direction_arrow = string.Empty;
+               // if the Lasts are different then we need to reformat the direction arrow in some fashion
+            } else if (_old_last_trade != _last_trade) {
+               var ltp = _last_trade.price;
+               if (MathUtils.epsilon_equals(ltp, _old_last_trade.Value.price)) {
+                  // update on the same price, so size must be different
+                  _direction_arrow = string.Empty;
+               } else if (ltp > _old_last_trade.Value.price) {
+                  _direction_arrow = "▲";
+               } else {
+                  _direction_arrow = "▼";
+               }
+            } 
+            // regardless of if we've arrived here via a new Last (and new direction arrow)
+            // or we're reusing the old one, this format bit is the same
+            return $"{_direction_arrow} {_last_trade.size} ";
         }
      }

@@ -825,6 +1083,7 @@ namespace mbts.spark {
                     case ColumnType.PIQ: SetCurrentValue(PIQColumnWidthProperty, col.settings.width); break;
                     case ColumnType.Volume:
                        SetCurrentValue(VolumeColumnWidthProperty, col.settings.width);
+                        _toggle_tooltips();
                        _volume_container.mark_dirty();
                        break;
                  }
@@ -9,9 +9,7 @@ using System.Linq;
 using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
-using System.Windows.Data;
 using System.Windows.Input;
-using System.Windows.Interactivity;
 using System.Windows.Media;

 namespace mbts.spark {
@@ -72,8 +70,7 @@ namespace mbts.spark {
                  panel.Children.Remove(item);
               }
            }
-         } //else
-            //Log.Ui.warn($"Failed to remove order ({order.id}): order not in {nameof(LadderOrdersHost)}'s {nameof(_orders)}.");
+         }
      }

      public void clear_orders() {
@@ -140,6 +137,7 @@ namespace mbts.spark {
                  // properly Dispose of it later when the popup is closed.
                  DataContext = obvm,
                  Child = view,
+                  // StaysOpen true for debugging
                  StaysOpen = false,
                  PlacementTarget = popup_placement_target,
                  Placement = System.Windows.Controls.Primitives.PlacementMode.Bottom,
@@ -156,7 +154,10 @@ namespace mbts.spark {
               popup.SetBinding(System.Windows.Controls.Primitives.Popup.IsOpenProperty,
                  nameof(OrderBookVM.is_row_collection_populated)
               );
-               popup.Closed += (sender, event_args) => (popup.DataContext as IDisposable)?.Dispose();
+               popup.Closed += (sender, event_args) => {
+                  (_parent.DataContext as LadderVM)?.on_mini_orderbook_closed(obvm.create());
+                  (popup.DataContext as IDisposable)?.Dispose();
+               };
               popup.MouseUp += (sender, event_args) => {
                  if (event_args.ChangedButton == MouseButton.Middle) {
                     popup.IsOpen = false;
@@ -192,11 +193,8 @@ namespace mbts.spark {
               Margin = Badge.DefaultMargin,
               Orientation = Orientation.Horizontal,
               MaxWidth = _col_width
-               //MaxHeight = _row_height,
-               //ClipToBounds = true
            };

-            //var view_box = new Viewbox { Child = panel, Width = _col_width, Height = _row_height };
            _position_panel(panel, price);
            _stacks[price] = new PriceCellComponents(panel);
            Children.Add(panel);
@@ -194,7 +194,9 @@ namespace mbts.spark {
        IEnumerable<VolumeAtPriceLevelImmutable> data,
        double row_height,
        ContractSpecificationImmutable spec,
-        VolumeColumnSettings settings
+        VolumeColumnSettings settings,
+        int last_index,
+        string last_size_and_direction
        ) {
         if (!data.Any()) {
            _clear_visual(dv);
@@ -213,32 +215,52 @@ namespace mbts.spark {
         Brush total_brush = null;
         if (settings.total.bars.result.HasValue) {
            total_brush = new SolidColorBrush(settings.total.bars.result.Value);
-         } else if (components.Count == 0) {
+         } else if (components.Count == 0 && !settings.show_ltq) {
            _clear_visual(dv);
            return;
         }
-         double max = data.Max(v => v.Volume);
-         Brush text_brush = settings.general.foreground.rgb_brush();
+         // inflate the max so that the graph never fills the available space
+         double max = data.Max(v => v.Volume) * 1.1;
         _render_cells(dv, row_height, data.Select(d => (d.Price, d)), settings.general, prices, spec, render_cell);
         /// local methods
         void render_cell(DrawingContext dc, int r, VolumeAtPriceLevelImmutable vap) {
+            Brush text_brush = settings.general.foreground.rgb_brush();
            double y = row_height * r;
+            var last_trade_here = r == last_index;
+
            // render the total first; each component (buy/sell/passive) will be rendered on top of the total
            if (total_brush != null) {
+               // if we have to change the brush to indicate this is the last, save brush, draw, then restore brush
+               var temp = total_brush;
+               if (settings.show_ltq && last_trade_here) {
+                  total_brush = BTSColors.yellow_brush;
+               }
               render_bar(dc, 0, y, vap.Volume, total_brush, out double _);
+               total_brush = temp;
            }
            List<string> numbers_text = new List<string>();
            double x_bar = 0;
            foreach ((var get_volume, Brush bars, bool show_numbers) in components) {
               uint v = get_volume(vap);
-               render_bar(dc, x_bar, y, v, bars, out double width);
+               double width;
+               if (settings.show_ltq && last_trade_here) {
+                  render_bar(dc, x_bar, y, v, BTSColors.yellow_brush, out width);
+               } else {
+                  render_bar(dc, x_bar, y, v, bars, out width);
+               }
               x_bar += width;
               if (show_numbers)
                  numbers_text.Add(v.ToString());
            }
+
            if (settings.total.show_numbers) {
               numbers_text.Add(vap.Volume.ToString());
            }
+            if (settings.show_ltq && last_trade_here) {
+               numbers_text.Clear();
+               numbers_text.Add(last_size_and_direction);
+               text_brush = BTSCoreColors.white;
+            }
            if (numbers_text.Count > 0) {
               string str = string.Join("/", numbers_text);
               GlyphRun gr = glyph_context.get_glyph_run(str, settings.general.font_size, settings.general.width, row_height, HorizontalAlignment.Center, 0, VerticalAlignment.Center, y, true);
@@ -253,7 +275,9 @@ namespace mbts.spark {
            }
            double pct = v / max;
            width = pct * settings.general.width;
-            dc.DrawRectangle(brush, null, new Rect(x, y, width, row_height - 1));
+            // 4 seems like a good number to move the y pos down by and similarly
+            // to shorten the total y coponent by (-4 for the shift of +4, and another -4 to give it some space);
+            dc.DrawRectangle(brush, null, new Rect(x, y + 4, width, row_height - 2 * 4));
         }
      }

@@ -288,22 +312,22 @@ namespace mbts.spark {
      }

      // this is basically a copy of redner_sizes up above
-      internal static void render_piqs(DrawingVisual dv, GlyphContext glyph_context, int origin_index, double[] prices, (double price, uint piq)[] piqs, double row_height, ContractSpecificationImmutable spec, LadderColumnSettings settings) {
+      internal static void render_piqs(DrawingVisual dv, GlyphContext glyph_context, int origin_index, double[] prices, IEnumerable<(double price, uint piq)> pvp, double row_height, ContractSpecificationImmutable spec, LadderColumnSettings settings) {
         using (var dc = dv.RenderOpen()) {
            using (_draw_with_clip(dc, settings, row_height, prices.Length)) {
-               if (!prices.within_range(origin_index) || piqs.is_null_or_empty())
+               if (!prices.within_range(origin_index) || pvp.is_null_or_empty())
                  return;
               var foreground = settings.foreground.rgb_brush();
               int curr_index = origin_index;
               double curr_price = prices[curr_index];
-               for (int i = 0; i < piqs.Length; i++) {
-                  double price = piqs[i].price;
+               foreach (var entry in pvp) {
+                  double price = entry.price;
                  // prices are in descending order, so get diff from curr_price - price
                  int tick_diff = spec.tickdiff_unchecked(curr_price, price);
                  curr_index += tick_diff;
                  curr_price = price;
                  if (curr_index >= 0 && curr_index < prices.Length) {
-                     var gr = format_text(piqs[i].piq.ToString(), curr_index, row_height, settings, glyph_context);
+                     var gr = format_text(entry.piq.ToString(), curr_index, row_height, settings, glyph_context);
                     dc.DrawGlyphRun(foreground, gr);
                  } else break;
               }
@@ -10,10 +10,15 @@ namespace mbts.ui.spark {
   /// </summary>
   partial class LadderSettingsView : UserControl {
      public const string
-         OrdersColumnSampleTemplateKey = nameof(OrdersColumnSampleTemplateKey),
-         ColumnVisibilityToggleTemplateKey = nameof(ColumnVisibilityToggleTemplateKey),
+         OrdersColumnTemplateKey = nameof(OrdersColumnTemplateKey),
+         VolumeColumnTemplateKey = nameof(VolumeColumnTemplateKey),
+         LastColumnTemplateKey = nameof(LastColumnTemplateKey),
         FavoriteAlgoAddButtonTemplateKey = nameof(FavoriteAlgoAddButtonTemplateKey);

+      public static readonly IMultiValueConverter LadderColumnToggleShowToolTipConverter =
+         ValueConverter.create<bool, bool, string, string>((can_toggle_show, show, col_name) =>
+            can_toggle_show ? $"{(show ? "Hide" : "Show")} {col_name}" : $"{col_name} cannot be {(show ? "hidden" : "shown")}.");
+
      public LadderSettingsView() =>
         InitializeComponent();

@@ -149,11 +149,34 @@ namespace mbts.spark {
         }

         void _host_PreviewMouseDown(object sender, MouseButtonEventArgs e) {
+            // When middle click over bid or ask columns:
+            //   Non-parameterizalbe order: change cursor to No indicating sending an order is not possible
+            //   Parameterizable order:  if qty is null/0, flash and No cursor
+            if (_host._vm != null) {
+               var pos = e.GetPosition(_host);
+               var column_type = _host._column_for_point(pos).column_type;
+               var selected_algo_can_expand = _host._vm.order_properties_vm?.selected_algo_definition?.algo_root?.can_expand ?? true;
+               if (e.MiddleButton == MouseButtonState.Pressed &&
+                  (column_type == LadderGridHost.ColumnType.Bid || column_type == LadderGridHost.ColumnType.Ask)) {
+                  if (!selected_algo_can_expand) {
+                     _host.Cursor = Cursors.No;
+                  }
+                  if (selected_algo_can_expand && (_host._vm.size_calculator.value ?? 0) == 0) {
+                     _host._vm.size_calculator.flash_error();
+                     _host.Cursor = Cursors.No;
+                  }
+               }
+            }
            _is_mouse_down = true;
            InvalidateVisual();
         }

          void _host_MouseUp(object sender, MouseButtonEventArgs e) {
+            // This will reset the cursor appropriately if the middle mouse button
+            // has been pressed while over the bid or ask columns
+            var point = e.GetPosition(_host);
+            _set_current_row_and_column(point);
+
            _is_mouse_down = false;
            _is_mouse_dragging = false;
            InvalidateVisual();
@@ -19,6 +19,7 @@
    <ResourceDictionary>
      <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="/view/Controls/Order/OrderDetailsPopupControl.xaml"/>
+        <ResourceDictionary Source="/view/Controls/Order/AlgoParamsView.xaml"/>
        <ResourceDictionary Source="/view/Controls/Order/AlgoTemplateFavoriteButtonsView.xaml"/>
      </ResourceDictionary.MergedDictionaries>
      <converters:BooleanToVisibilityConverter x:Key="BoolToInVisibility" VisibilityForTrue="Collapsed" VisibilityForFalse="Visible" />
@@ -31,7 +32,6 @@
        </converters:BooleanToObjectConverter.ValueForFalse>
      </converters:BooleanToObjectConverter>
      <converters:EnumCharacterCasingConverter x:Key="casing_converter"/>
-      <converters:DoubleTextConverter x:Key="PositionTextConverter" Format="0" NaNText="-"/>
      <converters:GridLengthConverter x:Key="GridLengthPixelConverter" UnitType="Pixel" />
      <converters:ResponsiveTextConverter x:Key="DayTextConverter" LongText="Day:" ShortText="D:" Threshold="99" />
      <converters:ResponsiveTextConverter x:Key="HighTextConverter" LongText="High:" ShortText="H:" Threshold="99"  />
@@ -288,8 +288,11 @@
        />
      </Grid.LayoutTransform>
      <Grid.ColumnDefinitions>
-        <ColumnDefinition Width="{Binding left_panel_width, Mode=TwoWay, Converter={StaticResource GridLengthPixelConverter}}" 
-                          MinWidth="60" MaxWidth="150"/>
+        <ColumnDefinition
+          Width="{Binding left_panel_width, Mode=TwoWay, Converter={StaticResource GridLengthPixelConverter}}" 
+          MinWidth="{x:Static spark:LadderView.MinLeftPanelWidth}"
+          MaxWidth="{x:Static spark:LadderView.MaxLeftPanelWidth}"
+        />
        <ColumnDefinition/>
      </Grid.ColumnDefinitions>
      <Grid.RowDefinitions>
@@ -309,11 +312,14 @@
              </Style>
            </StackPanel.Resources>
            <StackPanel x:Name="_slider_stack_panel" Margin="5,5,5,0">
-              <Slider x:Name="_ui_scaler" Value="{Binding zoom_factor}" 
-                      Minimum="{StaticResource MinZoomFactor}"
-                      Maximum="{StaticResource MaxZoomFactor}"
-                      Width="{Binding Path=ActualWidth, ElementName=_slider_stack_panel}"
-                      Visibility="{Binding show_zoom, Converter={StaticResource BooleanToVisibilityConverter}}"/>
+              <Slider
+                x:Name="_ui_scaler"
+                Value="{Binding zoom_factor}" 
+                Minimum="{x:Static spark:LadderView.MinZoomFactor}"
+                Maximum="{x:Static spark:LadderView.MaxZoomFactor}"
+                Width="{Binding Path=ActualWidth, ElementName=_slider_stack_panel}"
+                Visibility="{Binding show_zoom, Converter={StaticResource BooleanToVisibilityConverter}}"
+              />
            </StackPanel>
            <Grid Margin="2,4,2,0">
              <Grid.RowDefinitions>
@@ -455,13 +461,33 @@
            <Button
              Margin="2"
              Command="{Binding position_click_command}"
-              Content="{Binding position, Converter={StaticResource PositionTextConverter}}"
+              Content="{Binding position_display_text}"
              FontWeight="Bold"
              Foreground="{Binding position, Converter={StaticResource NumericSignBrushConverter}}"
-              Visibility="{Binding show_account_position, Converter={StaticResource BooleanToVisibilityConverter}}"
            >
+              <Button.Visibility>
+                <MultiBinding>
+                  <MultiBinding.Converter>
+                    <converters:MultiValueConverterPipe>
+                      <converters:BooleanOrConverter/>
+                      <converters:BooleanToVisibilityConverter/>
+                    </converters:MultiValueConverterPipe>
+                  </MultiBinding.Converter>
+                  <Binding Path="show_day_position"/>
+                  <Binding Path="show_account_position"/>
+                </MultiBinding>
+              </Button.Visibility>
              <Button.ToolTip>
-                <TextBlock Text="{Binding order_properties_vm.selected_account, StringFormat='{}{0} total position (click to copy to size)'}"/>
+                <!--<TextBlock Text="{Binding order_properties_vm.selected_account, StringFormat='{}{0} total position (click to copy to size)'}"/>-->
+                <TextBlock TextAlignment="Center">
+                  <TextBlock.Text>
+                    <MultiBinding Converter="{x:Static spark:LadderView.PositionToolTipConverter}">
+                      <Binding Path="order_properties_vm.selected_account"/>
+                      <Binding Path="show_day_position"/>
+                      <Binding Path="show_account_position"/>
+                    </MultiBinding>
+                  </TextBlock.Text>
+                </TextBlock>
              </Button.ToolTip>
            </Button>
            <!-- Qty textbox -->
@@ -1,4 +1,7 @@
-using bts.collections;
+using bts;
+using bts.collections;
+using bts.utils;
+using mbts.ui.converters;
 using mbts.utils;
 using System.Linq;
 using System.Windows;
@@ -8,7 +11,40 @@ using System.Windows.Input;

 namespace mbts.spark {
   partial class LadderView : UserControl {
-      readonly double _max_zoom, _min_zoom;
+      public const double
+         MinLeftPanelWidth = 60,
+         MaxLeftPanelWidth = 150,
+         MinZoomFactor = 0.5,
+         MaxZoomFactor = 1.5;
+
+      public static IMultiValueConverter PositionToolTipConverter =
+         ValueConverter.create<AccountTuple?, bool, bool, string>((account, show_day_pos, show_total_pos) => {
+            const string day_pos_text = "day", total_pos_text = "total";
+            if (!account.HasValue)
+               return string.Empty;
+            var sb = new StringBuilderEx(account.Value.name);
+            string primary_pos;
+            if (show_day_pos) {
+               primary_pos = day_pos_text;
+               if (show_total_pos) {
+                  sb.Add(" '", primary_pos, " ");
+                  sb.Add("(", total_pos_text, ")' ");
+               } else {
+                  sb.Add(" ", primary_pos, " ");
+               }
+            } else if (show_total_pos) {
+               primary_pos = total_pos_text;
+               sb.Add(" ", primary_pos, " ");
+            } else {
+               // unexpected code path (the button for which this tooltip is destined should be invisible in this case), but no need to throw an exception.
+               return string.Empty;
+            }
+            sb.Add("position\n(click to copy ");
+            if (show_day_pos && show_total_pos)
+               sb.Add(primary_pos, " position ");
+            sb.Add("to size)");
+            return sb.ToString();
+         });

      internal LadderView(LadderVM vm) {
         InitializeComponent();
@@ -18,19 +54,6 @@ namespace mbts.spark {
         this.vm = vm;
         DataContext = vm;
         DataContextChanged += datacontext_changed;
-         if (TryFindResource("MaxZoomFactor") is double found_max) {
-            _max_zoom = found_max;
-         } else {
-            // is there a better way of not specifying the constant twice ?
-            // once in the resource dictionary here and again in the xaml, seems like there has to be a better way
-            _max_zoom = 1.5;
-         }
-         // ditto
-         if (TryFindResource("MinZoomFactor") is double found_min) {
-            _min_zoom = found_min;
-         } else {
-            _min_zoom = 0.5;
-         }
         _ui_scaler.MouseDoubleClick += _ui_scaler_MouseDoubleClick;
         this.PreviewMouseWheel += LadderView_PreviewMouseWheel;
         this.PreviewMouseDown += LadderView_PreviewMouseDown;
@@ -46,7 +69,7 @@ namespace mbts.spark {
            var delta = (e.Delta > 0) ? 0.1 : -0.1;
            var proposed_scaler_value = _ui_scaler.Value + delta;
            // Here we enforce the same contraints that are on the gui slider regarding min and max
-            if (_min_zoom < proposed_scaler_value && proposed_scaler_value < _max_zoom) {
+            if (MinZoomFactor < proposed_scaler_value && proposed_scaler_value < MaxZoomFactor) {
               _ui_scaler.Value = proposed_scaler_value;
            }
         }
@@ -0,0 +1,149 @@
+using bts.api;
+using bts.api.position;
+using bts.utils;
+using mbts;
+using mbts.spark;
+using mbts.ui.shell;
+using System;
+using System.Collections.Generic;
+using System.Reactive.Linq;
+using System.Reflection;
+using System.Runtime.CompilerServices;
+
+namespace bts.shell.manual_fills {
+   class ManualFillRow : DisposableViewModelBase, IEquatable<ManualFillRow> {
+      public const int _uncommitted_record_id = -1;
+      static readonly PropertyInfo[] _snapshot_props =
+         Array.ConvertAll(new[] {
+               nameof(security),
+               nameof(account),
+               nameof(user),
+               nameof(side),
+               nameof(size),
+               nameof(price)
+         }, typeof(ManualFillRow).GetProperty);
+      readonly Property<bool> _is_dirty;
+      readonly Property<EditableItemState> _editable_item_state;
+      readonly DelegateProperty<bool> _is_valid;
+      SecurityImmutable? _security;
+      AccountTuple? _account;
+      UserTuple? _user;
+      Side _side;
+      uint _size;
+      double _price;
+      bool _is_selected;
+      ManualFillData? _data;
+      IDisposable _committed_snapshot;
+
+      public ManualFillRow(ManualFillData data) {
+         _data = data;
+         key = data.key;
+         _security = data.value.security;
+         _account = data.value.account;
+         _user = data.value.user;
+         _side = data.value.manual_fill.Side;
+         _size = data.value.manual_fill.Quantity;
+         _price = data.value.manual_fill.Price;
+         if (placeholder_key.HasValue) {
+            _is_dirty = backing(nameof(is_dirty), false);
+            _editable_item_state = backing(nameof(editable_item_state), EditableItemState.Uncommitted);
+            _committed_snapshot = ObjectSnapshot.create(this, _snapshot_props);
+         } else {
+            _is_dirty = backing(nameof(is_dirty), ObjectSnapshot.dirty_monitor(this, out _committed_snapshot, _snapshot_props));
+            _editable_item_state = backing(nameof(editable_item_state), _is_dirty, ch => ch.newval ? EditableItemState.Modified : EditableItemState.None);
+         }
+         _is_valid = backing(nameof(is_valid), () => _validate(this));
+      }
+
+      public event Action<bool> is_selected_changed;
+      // key/id
+      public ManualFillKey key { get; }
+      public long? placeholder_key => key.unpersisted;
+      public int record_id => key.persisted ?? _uncommitted_record_id;
+      public string record_id_display_text => key.persisted?.ToString();
+      // security/spec
+      public SecurityImmutable? security {
+         get => _security;
+         set {
+            if (_set(ref _security, value))
+               RaisePropertyChanged(nameof(spec));
+         }
+      }
+      public ContractSpecificationImmutable? spec => security.spec_or_default();
+      // account/user
+      public AccountTuple? account { get => _account; set => _set(ref _account, value); }
+      public UserTuple? user { get => _user; set => _set(ref _user, value); }
+      // side/size/price
+      public Side side { get => _side; set => _set(ref _side, value); }
+      public uint size { get => _size; set => _set(ref _size, value); }
+      public double price { get => _price; set => _set(ref _price, value); }
+      // is selected
+      public bool is_selected {
+         get => _is_selected;
+         set {
+            if (_set(ref _is_selected, value))
+               is_selected_changed?.Invoke(value);
+         }
+      }
+      // dirty/valid/editable-state
+      public bool is_dirty => _is_dirty.Value;
+      public bool is_valid => _is_valid.Value;
+      public EditableItemState editable_item_state => _editable_item_state.Value;
+
+      public ManualFillData data => _data ??
+         (_data = new ManualFillData(key, new ManualFillTuple(new ManualFillImmutable(to_man_fill()), security, account, user))).Value;
+
+      public void revert() =>
+         _committed_snapshot.Dispose();
+
+      public IObservable<bool> subscribe_is_dirty() =>
+         _is_dirty.observe_current(true);
+
+      public IObservable<bool> subscribe_is_selected() =>
+         Observable.Create<bool>(o => {
+            o.OnNext(is_selected);
+            is_selected_changed += o.OnNext;
+            return Disposable.Create(() => is_selected_changed -= o.OnNext);
+         });
+
+      public ManualFill to_man_fill() =>
+         new ManualFill {
+            RecordId = record_id,
+            AccountId = account?.id ?? 0,
+            AccountName = account?.name ?? string.Empty,
+            UserId = user?.id ?? 0,
+            Price = price,
+            Side = side,
+            Quantity = size,
+            SecurityKey = security?.Id ?? 0
+         };
+
+      public ManualFillTuple to_tuple() =>
+         new ManualFillTuple(new ManualFillImmutable(to_man_fill()), security, account, user);
+
+      public bool Equals(ManualFillRow other) =>
+         data == other?.data;
+
+      public override bool Equals(object obj) => Equals(obj as ManualFillRow);
+      public override int GetHashCode() => record_id;
+
+      static bool _validate(ManualFillRow row) =>
+         row.security.HasValue &&
+         row.account.HasValue &&
+         row.user.HasValue &&
+         row.side != Side.Undefined &&
+         !double.IsNaN(row._price);
+
+      bool _set<T>(ref T backing, T value, [CallerMemberName] string prop_name = "") =>
+         _set(ref backing, value, EqualityComparer<T>.Default, prop_name);
+
+      bool _set<T>(ref T backing, T value, IEqualityComparer<T> comparer, [CallerMemberName] string prop_name = "") {
+         if (Set(ref backing, value, comparer, prop_name)) {
+            _is_valid.refresh();
+            _data = null;
+            return true;
+         }
+         return false;
+      }
+   }
+}
@@ -0,0 +1,86 @@
+<UserControl
+  x:Class="mbts.ui.spark.ManualFillRowEditor"
+  x:ClassModifier="internal"
+  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+  xmlns:u="clr-namespace:mbts.ui"
+  xmlns:c="clr-namespace:mbts.ui.controls"
+  xmlns:usp="clr-namespace:mbts.ui.spark"
+  xmlns:sys="clr-namespace:System;assembly=mscorlib"
+  FocusVisualStyle="{x:Null}"
+>
+  <UserControl.Resources>
+    <sys:Double x:Key="HorizontalPush">4</sys:Double>
+    <sys:Double x:Key="VerticalPush3">8</sys:Double>
+    <Style x:Key="HeaderText" TargetType="TextBlock">
+      <Setter Property="HorizontalAlignment" Value="Center"/>
+      <Setter Property="VerticalAlignment" Value="Center"/>
+      <Setter Property="Foreground" Value="{x:Static u:BTSColors.header_text_brush}"/>
+      <Setter Property="Margin" Value="4"/>
+    </Style>
+  </UserControl.Resources>
+  <Grid>
+    <Grid.RowDefinitions>
+      <RowDefinition Height="*"/>
+      <RowDefinition Height="Auto"/>
+    </Grid.RowDefinitions>
+    <Grid Margin="6">
+      <Grid.ColumnDefinitions>
+        <ColumnDefinition Width="Auto"/>
+        <ColumnDefinition Width="{Binding Source={StaticResource HorizontalPush}}"/>
+        <ColumnDefinition Width="Auto"/>
+        <ColumnDefinition Width="{Binding Source={StaticResource HorizontalPush}}"/>
+        <ColumnDefinition Width="Auto"/>
+        <ColumnDefinition Width="{Binding Source={StaticResource HorizontalPush}}"/>
+        <ColumnDefinition Width="Auto"/>
+        <ColumnDefinition Width="{Binding Source={StaticResource HorizontalPush}}"/>
+        <ColumnDefinition Width="Auto"/>
+        <ColumnDefinition Width="{Binding Source={StaticResource HorizontalPush}}"/>
+        <ColumnDefinition Width="Auto"/>
+        <ColumnDefinition Width="{Binding Source={StaticResource HorizontalPush}}"/>
+        <ColumnDefinition Width="Auto"/>
+      </Grid.ColumnDefinitions>
+      <Grid.RowDefinitions>
+        <RowDefinition Height="Auto"/>
+        <RowDefinition Height="{Binding Source={StaticResource VerticalPush3}}"/>
+        <RowDefinition Height="*"/>
+      </Grid.RowDefinitions>
+      <Rectangle Grid.ColumnSpan="11" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Fill="{x:Static u:BTSColors.header_brush}"/>
+      <TextBlock Grid.Column="0" Text="Security" Style="{StaticResource HeaderText}"/>
+      <TextBlock Grid.Column="2" Text="Account" Style="{StaticResource HeaderText}"/>
+      <TextBlock Grid.Column="4" Text="User" Style="{StaticResource HeaderText}"/>
+      <TextBlock Grid.Column="6" Text="Side" Style="{StaticResource HeaderText}"/>
+      <TextBlock Grid.Column="8" Text="Qty" Style="{StaticResource HeaderText}"/>
+      <TextBlock Grid.Column="10" Text="Price" Style="{StaticResource HeaderText}"/>
+
+      <c:ContractPickerPopup
+        Grid.Row="2"
+        HorizontalAlignment="Stretch"
+        VerticalAlignment="Stretch"
+        CloseOnCancel="True"
+        CloseOnOK="True"
+        Header="{Binding security}"
+        IsEditMode="False"
+        IsLazy="True"
+        SecurityMap="{DynamicResource ResourceKey={x:Static usp:ManualFillRowEditor.SecuritiesKey}}"
+        SelectedSecurity="{Binding security, UpdateSourceTrigger=Explicit}"
+        ShowDialogSkirt="True"
+        ToolTip="{Binding SelectedCriteria, RelativeSource={RelativeSource Self}, Converter={x:Static c:ContractPickerPopup.SecurityCriteriaTextConverter}, Mode=OneWay}"
+        OKClick="{x:Static c:ContractPickerPopup.FlushSelectedSecurityHandler}"
+      />
+      <ComboBox Grid.Row="2" Grid.Column="2" ItemsSource="{DynamicResource ResourceKey={x:Static usp:ManualFillRowEditor.AccountsKey}}" SelectedItem="{Binding account}"/>
+      <ComboBox Grid.Row="2" Grid.Column="4" ItemsSource="{DynamicResource ResourceKey={x:Static usp:ManualFillRowEditor.UsersKey}}" SelectedItem="{Binding user}"/>
+      <ComboBox Grid.Row="2" Grid.Column="6" ItemsSource="{DynamicResource ResourceKey={x:Static usp:ManualFillRowEditor.SidesKey}}" SelectedItem="{Binding side}" Width="48"/>
+      <c:TickUpDownUInt Grid.Row="2" Grid.Column="8" MinWidth="40" Value="{Binding size}"/>
+      <usp:PriceEntryControl Grid.Row="2" Grid.Column="10" MinWidth="55" Value="{Binding price}" ContractSpec="{Binding spec}"/>
+    </Grid>
+    <c:DialogSkirt Grid.Row="1" Margin="0,6,0,0">
+      <c:DialogSkirt.RightItems>
+        <x:Array Type="{x:Type Button}">
+          <Button Content="OK" Command="{x:Static usp:ManualFillRowEditor.CommitCommand}" CommandParameter="{Binding}" IsDefault="True"/>
+          <Button Content="Cancel" Command="{x:Static usp:ManualFillRowEditor.CancelCommand}" IsCancel="True"/>
+        </x:Array>
+      </c:DialogSkirt.RightItems>
+    </c:DialogSkirt>
+  </Grid>
+</UserControl>
@@ -0,0 +1,22 @@
+using System.Windows.Controls;
+using System.Windows.Input;
+
+namespace mbts.ui.spark {
+   /// <summary>
+   /// Interaction logic for ManualFillRowEditor.xaml
+   /// </summary>
+   partial class ManualFillRowEditor : UserControl {
+      public const string
+         SecuritiesKey = nameof(SecuritiesKey),
+         AccountsKey = nameof(AccountsKey),
+         UsersKey = nameof(UsersKey),
+         SidesKey = nameof(SidesKey);
+
+      public static readonly RoutedCommand
+         CommitCommand = new RoutedCommand(),
+         CancelCommand = new RoutedCommand();
+
+      public ManualFillRowEditor() =>
+         InitializeComponent();
+   }
+}
@@ -0,0 +1,39 @@
+<Window
+  x:Class="mbts.ui.spark.ManualFillsImportConflictsDialog"
+  x:ClassModifier="internal"
+  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+  xmlns:u="clr-namespace:mbts.ui"
+  xmlns:c="clr-namespace:mbts.ui.controls"
+  xmlns:usp="clr-namespace:mbts.ui.spark"
+  u:WindowStyle.AllowResize="True"
+  u:WindowStyle.SizeToContent="WidthAndHeight"
+  u:WindowStyle.TitleContent="Import Fills Conflicts"
+  Style="{StaticResource BTSDialogTitleTemplate}"
+>
+  <u:WindowStyle.TitleContentTemplate>
+    <DataTemplate>
+      <StackPanel Orientation="Horizontal" HorizontalAlignment="Left">
+        <Image Height="12" Margin="5,2" Source="{x:Static u:Icons.Import}"/>
+        <TextBlock Margin="4,0,0,0" Text="{Binding}"/>
+      </StackPanel>
+    </DataTemplate>
+  </u:WindowStyle.TitleContentTemplate>
+  <Window.Content>
+    <Grid>
+      <Grid.RowDefinitions>
+        <RowDefinition Height="*"/>
+        <RowDefinition Height="Auto"/>
+      </Grid.RowDefinitions>
+      <usp:ManualFillsImportConflictsView Margin="12,10,12,8"/>
+      <c:DialogSkirt Grid.Row="1">
+        <c:DialogSkirt.RightItems>
+          <x:Array Type="{x:Type Button}">
+            <Button Command="{Binding ok_cmd}">Continue</Button>
+            <Button Command="{Binding cancel_cmd}" IsCancel="True">Cancel</Button>
+          </x:Array>
+        </c:DialogSkirt.RightItems>
+      </c:DialogSkirt>
+    </Grid>
+  </Window.Content>
+</Window>
@@ -0,0 +1,11 @@
+using System.Windows;
+
+namespace mbts.ui.spark {
+   /// <summary>
+   /// Interaction logic for ManualFillsImportConflictsDialog.xaml
+   /// </summary>
+   partial class ManualFillsImportConflictsDialog : Window {
+      public ManualFillsImportConflictsDialog() =>
+         InitializeComponent();
+   }
+}
@@ -0,0 +1,106 @@
+using bts.api;
+using bts.collections;
+using mbts;
+using mbts.collections;
+using mbts.ui;
+using mbts.ui.shell;
+using mbts.ui.utility;
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Linq;
+using System.Reactive.Linq;
+using System.Windows.Data;
+using System.Windows.Input;
+using Component = mbts.ui.spark.ManualFillsImportConflictsView.ManualFillComponent;
+
+namespace bts.shell.manual_fills {
+   class ManualFillsImportVM : DisposableViewModelBase, IRequestViewClose {
+      readonly RefCountMap<ParsedManualFill> _conflicts = new RefCountMap<ParsedManualFill>();
+      IReadOnlyDictionary<uint, SecurityMD> _security_map = DictionaryHelper.empty<uint, SecurityMD>();
+
+      public ManualFillsImportVM(int num_fills) {
+         rows_view = CollectionViewSource.GetDefaultView(rows);
+         ok_cmd = new DelegateCommand(() => import_request?.Invoke());
+         cancel_cmd = new DelegateCommand(() => RequestClose?.Invoke(this, new EventArgs()));
+         this.num_fills = num_fills;
+         _dispose = ObservableAutoWrapper.connect_item_hooks(rows, r =>
+            r.subscribe_has_error().Subscribe(has_error => {
+               if (has_error) {
+                  if (r.affected_fills.Count(_conflicts.increment_adds_key) == 0)
+                     return;
+               } else if (r.affected_fills.Count(_conflicts.decrement_removes_key) == 0)
+                  return;
+               RaisePropertyChanged(nameof(num_successfully_parsed_fills));
+            }));
+      }
+
+      public event Action import_request;
+      public event EventHandler RequestClose;
+
+      public ObservableCollection<Row> rows { get; } = new ObservableCollection<Row>();
+      public ICollectionView rows_view { get; }
+      public int num_fills { get; }
+      public int num_successfully_parsed_fills => num_fills - _conflicts.Count;
+      // misc items sources
+      public IEnumerable<Side> sides => new[] { Side.Buy, Side.Sell };
+      public ObservableCollection<AccountTuple?> accounts { get; } = new ObservableCollection<AccountTuple?>();
+      public ObservableCollection<UserTuple?> users { get; } = new ObservableCollection<UserTuple?>();
+      public IReadOnlyDictionary<uint, SecurityMD> security_map {
+         get => _security_map;
+         set {
+            if (!ReferenceEquals(_security_map, value)) {
+               _security_map = value;
+               _resolve_securities();
+               RaisePropertyChanged();
+            }
+         }
+      }
+      // commands
+      public ICommand ok_cmd { get; }
+      public ICommand cancel_cmd { get; }
+
+      void _resolve_securities() {
+         if (_security_map == null)
+            return;
+         var reverse_lookup = ManualFillsParser.reverse_lookup(MappedDictionary.create(_security_map, v => v.security.ToString()));
+         foreach (var r in rows) {
+            if (r.component == Component.Security && r.has_error) {
+               var id = reverse_lookup(r.text);
+               if (id != 0 && _security_map.TryGetValue(id, out var smd))
+                  r.value = smd.security;
+            }
+         }
+      }
+
+      public class Row : ViewModelBase, ITemplateSelectorKey {
+         readonly DelegateProperty<bool> _has_error;
+         object _value;
+         string _text;
+
+         public Row(Component component, string text, IReadOnlyCollection<ParsedManualFill> affected_fills, object error_value, object value) {
+            this.component = component;
+            this.text = text;
+            this.affected_fills = affected_fills;
+            _value = value;
+            _has_error = backing(nameof(has_error), () => Equals(this.value, error_value));
+         }
+
+         public Component component { get; }
+         public string text { get => _text; set => Set(ref _text, value); }
+         public IReadOnlyCollection<ParsedManualFill> affected_fills { get; }
+         public object value {
+            get => _value;
+            set {
+               if (Set(ref _value, value))
+                  _has_error.refresh();
+            }
+         }
+         public bool has_error => _has_error.Value;
+         string ITemplateSelectorKey.key => component.ToString();
+
+         public IObservable<bool> subscribe_has_error() => _has_error.observe_current(true);
+      }
+   }
+}
@@ -0,0 +1,144 @@
+<UserControl
+  x:Class="mbts.ui.spark.ManualFillsImportConflictsView"
+  x:ClassModifier="internal"
+  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+  xmlns:u="clr-namespace:mbts.ui"
+  xmlns:c="clr-namespace:mbts.ui.controls"
+  xmlns:cv="clr-namespace:mbts.ui.converters"
+  xmlns:usp="clr-namespace:mbts.ui.spark"
+  MinWidth="400"
+>
+  <UserControl.Resources>
+    <Style x:Key="VerticallyCenteredText" TargetType="TextBlock">
+      <Setter Property="VerticalAlignment" Value="Center"/>
+    </Style>
+    <!--Value Cell Template Selector-->
+    <u:KeyedTemplateSelector x:Key="ValueCellTemplateSelector">
+      <u:KeyedTemplateSelector.Default>
+        <DataTemplate>
+          <TextBlock Text="{Binding value}" VerticalAlignment="Center"/>
+        </DataTemplate>
+      </u:KeyedTemplateSelector.Default>
+      <u:TemplateSelectorKeyValue Key="{x:Static Price, MemberType={u:Nested usp:ManualFillsImportConflictsView.ManualFillComponentNames}}">
+        <DataTemplate>
+          <TextBlock Text="{Binding value, Converter={StaticResource DoubleTextConverter}}" VerticalAlignment="Center"/>
+        </DataTemplate>
+      </u:TemplateSelectorKeyValue>
+    </u:KeyedTemplateSelector>
+    <!--Value Cell Editing Template Selector-->
+    <u:KeyedTemplateSelector x:Key="ValueCellEditingTemplateSelector">
+      <u:TemplateSelectorKeyValue Key="{x:Static Security, MemberType={u:Nested usp:ManualFillsImportConflictsView.ManualFillComponentNames}}">
+        <DataTemplate>
+          <c:ContractPickerPopup
+            HorizontalAlignment="Stretch"
+            VerticalAlignment="Stretch"
+            CloseOnCancel="True"
+            CloseOnOK="True"
+            Header="{Binding value}"
+            IsEditMode="False"
+            IsLazy="True"
+            SecurityMap="{Binding DataContext.security_map, RelativeSource={RelativeSource AncestorType=DataGrid}, Mode=OneWay}"
+            SelectedSecurity="{Binding value, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
+            ShowDialogSkirt="True"
+          />
+        </DataTemplate>
+      </u:TemplateSelectorKeyValue>
+      <u:TemplateSelectorKeyValue Key="{x:Static Account, MemberType={u:Nested usp:ManualFillsImportConflictsView.ManualFillComponentNames}}">
+        <DataTemplate>
+          <ComboBox ItemsSource="{Binding DataContext.accounts, RelativeSource={RelativeSource AncestorType=DataGrid}}" SelectedItem="{Binding value, UpdateSourceTrigger=PropertyChanged}"/>
+        </DataTemplate>
+      </u:TemplateSelectorKeyValue>
+      <u:TemplateSelectorKeyValue Key="{x:Static User, MemberType={u:Nested usp:ManualFillsImportConflictsView.ManualFillComponentNames}}">
+        <DataTemplate>
+          <ComboBox ItemsSource="{Binding DataContext.users, RelativeSource={RelativeSource AncestorType=DataGrid}}" SelectedItem="{Binding value, UpdateSourceTrigger=PropertyChanged}"/>
+        </DataTemplate>
+      </u:TemplateSelectorKeyValue>
+      <u:TemplateSelectorKeyValue Key="{x:Static Side, MemberType={u:Nested usp:ManualFillsImportConflictsView.ManualFillComponentNames}}">
+        <DataTemplate>
+          <ComboBox ItemsSource="{Binding DataContext.sides, RelativeSource={RelativeSource AncestorType=DataGrid}}" SelectedItem="{Binding value, UpdateSourceTrigger=PropertyChanged}"/>
+        </DataTemplate>
+      </u:TemplateSelectorKeyValue>
+      <u:TemplateSelectorKeyValue Key="{x:Static Size, MemberType={u:Nested usp:ManualFillsImportConflictsView.ManualFillComponentNames}}">
+        <DataTemplate>
+          <c:TickUpDownUInt Value="{Binding value, UpdateSourceTrigger=PropertyChanged}"/>
+        </DataTemplate>
+      </u:TemplateSelectorKeyValue>
+      <u:TemplateSelectorKeyValue Key="{x:Static Price, MemberType={u:Nested usp:ManualFillsImportConflictsView.ManualFillComponentNames}}">
+        <DataTemplate>
+          <usp:PriceEntryControl Value="{Binding value, UpdateSourceTrigger=PropertyChanged}"/>
+        </DataTemplate>
+      </u:TemplateSelectorKeyValue>
+    </u:KeyedTemplateSelector>
+  </UserControl.Resources>
+  <!--Content-->
+  <Grid x:Name="content_root">
+    <Grid.RowDefinitions>
+      <RowDefinition Height="Auto"/>
+      <RowDefinition Height="*"/>
+    </Grid.RowDefinitions>
+    <Grid.ColumnDefinitions>
+      <ColumnDefinition Width="Auto"/>
+      <ColumnDefinition Width="*"/>
+    </Grid.ColumnDefinitions>
+    <Image VerticalAlignment="Center" Margin="0,0,8,0">
+      <Image.Source>
+        <Binding Source="{x:Static MessageBoxImage.Exclamation}">
+          <Binding.Converter>
+            <cv:SystemIconConverter/>
+          </Binding.Converter>
+        </Binding>
+      </Image.Source>
+    </Image>
+    <Canvas x:Name="text_canvas" Grid.Column="1" HorizontalAlignment="Stretch"/>
+    <TextBlock Grid.Column="1" TextWrapping="Wrap" Width="{Binding ActualWidth, ElementName=text_canvas}">
+      <Run Text="{Binding num_successfully_parsed_fills, Mode=OneWay}"/>
+      <Run Text="/"/>
+      <Run Text="{Binding num_fills, Mode=OneWay}"/>
+      <Run Text=" fills have been successfully converted."/>
+      <Run Text="Resolve conflicts below by selecting a value to assign each affected fill,"/>
+      <Run Text="or modify individual fills in the main window."/>
+      <LineBreak/>
+      <LineBreak/>
+      <Run Text="Click 'Continue' to proceed to the main window."/>
+    </TextBlock>
+    <DataGrid
+      x:Name="data_grid"
+      u:DataGridBehavior.SingleClickEdit="True"
+      Grid.Row="1"
+      Grid.ColumnSpan="2"
+      AutoGenerateColumns="False"
+      CanUserAddRows="False"
+      CanUserDeleteRows="False"
+      CanUserReorderColumns="False"
+      CanUserSortColumns="True"
+      HeadersVisibility="All"
+      ItemsSource="{Binding rows_view}"
+      Margin="0,8,0,0"
+      MinRowHeight="17"
+      RowHeaderWidth="22"
+    >
+      <DataGrid.CellStyle>
+        <Style TargetType="DataGridCell" BasedOn="{StaticResource DataGridCellBaseStyle}">
+          <Setter Property="VerticalContentAlignment" Value="Stretch"/>
+        </Style>
+      </DataGrid.CellStyle>
+      <DataGrid.RowStyle>
+        <Style TargetType="DataGridRow">
+          <Setter Property="IsSelected" Value="{Binding is_selected, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
+          <Style.Triggers>
+            <DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource Self}}" Value="True">
+              <Setter Property="Background" Value="{StaticResource SelectedRowBackground}"/>
+            </DataTrigger>
+          </Style.Triggers>
+        </Style>
+      </DataGrid.RowStyle>
+      <DataGrid.Columns>
+        <DataGridTextColumn Header="Component" Binding="{Binding component}" ElementStyle="{StaticResource VerticallyCenteredText}" IsReadOnly="True"/>
+        <DataGridTextColumn Header="Text" Binding="{Binding text}" ElementStyle="{StaticResource VerticallyCenteredText}" IsReadOnly="True"/>
+        <DataGridTextColumn Header="Affected Fills" Binding="{Binding affected_fills.Count}" ElementStyle="{StaticResource VerticallyCenteredText}" IsReadOnly="True"/>
+        <DataGridTemplateColumn Header="Value" CellTemplateSelector="{StaticResource ValueCellTemplateSelector}" CellEditingTemplateSelector="{StaticResource ValueCellEditingTemplateSelector}"/>
+      </DataGrid.Columns>
+    </DataGrid>
+  </Grid>
+</UserControl>
@@ -0,0 +1,30 @@
+using System.Windows.Controls;
+
+namespace mbts.ui.spark {
+   /// <summary>
+   /// Interaction logic for ManualFillsImportConflictsView.xaml
+   /// </summary>
+   partial class ManualFillsImportConflictsView : UserControl {
+      public ManualFillsImportConflictsView() =>
+         InitializeComponent();
+
+      public enum ManualFillComponent {
+         Security,
+         Account,
+         User,
+         Side,
+         Size,
+         Price
+      }
+
+      public static class ManualFillComponentNames {
+         public static readonly string
+            Security = ManualFillComponent.Security.ToString(),
+            Account = ManualFillComponent.Account.ToString(),
+            User = ManualFillComponent.User.ToString(),
+            Side = ManualFillComponent.Side.ToString(),
+            Size = ManualFillComponent.Size.ToString(),
+            Price = ManualFillComponent.Price.ToString();
+      }
+   }
+}
@@ -0,0 +1,107 @@
+using bts.api.core;
+using bts.api.position;
+using bts.collections;
+using mbts.spark;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reactive.Linq;
+using System.Threading.Tasks;
+
+namespace bts.shell.manual_fills {
+   struct ManualFillKey : IEquatable<ManualFillKey>, IComparable<ManualFillKey> {
+      public readonly int? persisted;
+      public readonly long? unpersisted;
+
+      public ManualFillKey(int persisted) {
+         this.persisted = persisted;
+         unpersisted = null;
+      }
+
+      public ManualFillKey(long unpersisted) {
+         this.unpersisted = unpersisted;
+         persisted = null;
+      }
+
+      public int CompareTo(ManualFillKey other) {
+         if (persisted.HasValue) {
+            if (other.persisted.HasValue) {
+               return persisted.Value.CompareTo(other.persisted.Value);
+            } else if (other.unpersisted.HasValue) {
+               return -1;
+            } else return 1;
+         } else if (unpersisted.HasValue) {
+            return other.unpersisted.HasValue ? unpersisted.Value.CompareTo(other.unpersisted.Value) : 1;
+         } else return !other.persisted.HasValue && !other.unpersisted.HasValue ? 0 : -1;
+      }
+
+      public override string ToString() => persisted.HasValue ? persisted.Value.ToString() : unpersisted.HasValue ? unpersisted.Value.ToString() : "(N/A)";
+
+      public bool Equals(ManualFillKey other) =>
+         persisted == other.persisted &&
+         unpersisted == other.unpersisted;
+
+      public override bool Equals(object obj) =>
+         obj is ManualFillKey other && Equals(other);
+
+      public override int GetHashCode() => persisted ?? unpersisted?.GetHashCode() ?? 0;
+      public static bool operator ==(ManualFillKey a, ManualFillKey b) => a.Equals(b);
+      public static bool operator !=(ManualFillKey a, ManualFillKey b) => !a.Equals(b);
+   }
+
+   struct ManualFillData : IEquatable<ManualFillData> {
+      public static readonly Func<ManualFillData, ManualFillKey> key_fn = mfd => mfd.key;
+
+      public readonly ManualFillKey key;
+      public readonly ManualFillTuple value;
+
+      public ManualFillData(ManualFillKey key, ManualFillTuple value) {
+         this.key = key;
+         this.value = value;
+      }
+
+      public bool Equals(ManualFillData other) =>
+         key == other.key &&
+         value.Equals(other.value);
+
+      public override bool Equals(object obj) =>
+         obj is ManualFillData other && Equals(other);
+
+      public override int GetHashCode() =>
+         key.GetHashCode();
+
+      public static bool operator ==(ManualFillData a, ManualFillData b) => a.Equals(b);
+      public static bool operator !=(ManualFillData a, ManualFillData b) => !a.Equals(b);
+   }
+
+   class ManualFillsModel {
+      readonly OrdersModel _model;
+
+      public ManualFillsModel(OrdersModel model)
+         : this(model, model.on_manual_fill_tuples,
+              model.factory.subscribe_accounts().Select(d => MappedDictionary.create(d, kv => new AccountTuple(kv.Key, kv.Value))).Table(u => u.id),
+              model.factory.subscribe_users().Select(d => MappedDictionary.create(d, kv => new UserTuple(kv.Key, kv.Value))).Table(a => a.id)) { }
+
+      public ManualFillsModel(OrdersModel model, IObservable<TableUpdate<ManualFillTuple, int>> manual_fills, IObservable<TableUpdate<AccountTuple, uint>> accounts, IObservable<TableUpdate<UserTuple, uint>> users) {
+         _model = model;
+         this.manual_fills = manual_fills.SelectKeyValue(
+            mft => new ManualFillData(new ManualFillKey(mft.manual_fill.RecordId), mft),
+            ManualFillData.key_fn);
+         this.accounts = accounts;
+         this.users = users;
+      }
+
+      public IObservable<TableUpdate<ManualFillData, ManualFillKey>> manual_fills { get; }
+      public IObservable<TableUpdate<AccountTuple, uint>> accounts { get; }
+      public IObservable<TableUpdate<UserTuple, uint>> users { get; }
+
+      public async Task delete_fills(IEnumerable<ManualFill> fills) =>
+         await _model.delete_manual_fills(fills);
+
+     public async Task<bool> create_fills(IEnumerable<ManualFill> fills) =>
+         await _model.create_manual_fills(fills);
+
+      public async Task<bool> update_fills(IEnumerable<ManualFill> fills) =>
+         await _model.update_manual_fills(fills);
+   }
+}
@@ -0,0 +1,162 @@
+using bts.api;
+using bts.api.position;
+using bts.collections;
+using bts.utils;
+using mbts.ui.utility;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using ManualFillComponent = mbts.ui.spark.ManualFillsImportConflictsView.ManualFillComponent;
+
+namespace bts.shell.manual_fills {
+   class ParsedManualFill {
+      public readonly Guid unpersisted_id = Guid.NewGuid();
+      public readonly ManualFill result = new ManualFill();
+
+      public (string text, bool success) security { get; set; }
+      public (string text, bool success) account { get; set; }
+      public (string text, bool success) user { get; set; }
+      public (string text, bool success) side { get; set; }
+      public (string text, bool success) quantity { get; set; }
+      public (string text, bool success) price { get; set; }
+
+      public bool Equals(ParsedManualFill other) => other != null && unpersisted_id == other.unpersisted_id;
+      public override bool Equals(object obj) => Equals(obj as ParsedManualFill);
+      public override int GetHashCode() => unpersisted_id.GetHashCode();
+   }
+
+   static class ManualFillsParser {
+      public const string file_extension = "csv";
+
+      public static Action<ManualFill, object> assign_component(ManualFillComponent component) {
+         switch (component) {
+            case ManualFillComponent.Security: return (mf, val) => mf.SecurityKey = ConvertUtils.try_convert<SecurityImmutable?>(val)?.Id ?? 0;
+            case ManualFillComponent.Account: return (mf, val) => mf.AccountId = ConvertUtils.try_convert<AccountTuple?>(val)?.id ?? 0;
+            case ManualFillComponent.User: return (mf, val) => mf.UserId = ConvertUtils.try_convert<UserTuple?>(val)?.id ?? 0;
+            case ManualFillComponent.Side: return (mf, val) => mf.Side = ConvertUtils.try_convert<Side>(val, Side.Undefined);
+            case ManualFillComponent.Size: return (mf, val) => mf.Quantity = ConvertUtils.try_convert<uint>(val);
+            case ManualFillComponent.Price: return (mf, val) => mf.Price = ConvertUtils.try_convert(val, double.NaN);
+            default: throw new NotImplementedException(); 
+         }
+      }
+
+      /// Note: the returned dictionary will have entries for each <see cref="ManualFillComponent"/>, regardless of whether or not that component has any conflicts.
+      public static Dictionary<ManualFillComponent, Dictionary<string, List<ParsedManualFill>>> get_conflicts(IEnumerable<ParsedManualFill> parsed_fills) {
+         var missing_components = EnumHelper.get_values<ManualFillComponent>().ToDictionary(c => c, c => new Dictionary<string, List<ParsedManualFill>>());
+         var mk_list = new Func<string, List<ParsedManualFill>>(_ => new List<ParsedManualFill>());
+         foreach (var pmf in parsed_fills) {
+            if (!pmf.security.success) {
+               add_missing(ManualFillComponent.Security, pmf.security.text, pmf);
+            }
+            if (!pmf.account.success) {
+               add_missing(ManualFillComponent.Account, pmf.account.text, pmf);
+            }
+            if (!pmf.user.success) {
+               add_missing(ManualFillComponent.User, pmf.user.text, pmf);
+            }
+            if (!pmf.quantity.success) {
+               add_missing(ManualFillComponent.Size, pmf.quantity.text, pmf);
+            }
+            if (!pmf.side.success) {
+               add_missing(ManualFillComponent.Side, pmf.side.text, pmf);
+            }
+            if (!pmf.price.success) {
+               add_missing(ManualFillComponent.Price, pmf.price.text, pmf);
+            }
+         }
+         return missing_components;
+         void add_missing(ManualFillComponent component, string text, ParsedManualFill result) =>
+            missing_components[component].GetOrAdd(text ?? string.Empty, mk_list).Add(result);
+      }
+
+      // This implementation prioritizes simplicity over speed.
+      // The security desc lookup could be better optimized, but the speed at which fills are imported is probably not a paramount concern.
+      public static IEnumerable<ParsedManualFill> parse_rows(IEnumerable<string> rows, IReadOnlyDictionary<uint, SecurityImmutable> security_map, IReadOnlyDictionary<uint, string> account_map, IReadOnlyDictionary<uint, string> user_map) =>
+         parse_rows(rows,
+            reverse_lookup(MappedDictionary.create(security_map, kv => kv.Value.ToString())),
+            reverse_lookup(account_map),
+            reverse_lookup(user_map));
+
+      public static IEnumerable<ParsedManualFill> parse_rows(IEnumerable<string> rows, Func<string, uint> security_id_lookup, Func<string, uint> account_id_lookup, Func<string, uint> user_id_lookup) {
+         var columns = new[] {
+            (Headers.Security, Cells.security(security_id_lookup)),
+            (Headers.Account, Cells.account(account_id_lookup)),
+            (Headers.User, Cells.user(user_id_lookup)),
+            (Headers.Side, Cells.side),
+            (Headers.Quantity, Cells.quantity),
+            (Headers.Price, Cells.price)
+         }.ToDictionary(col => col.Item1, col => col.Item2.with_null_check());
+         return RowParser.parse_rows(rows, columns, Cells.delimiter);
+      }
+
+      public static Func<string, TKey> reverse_lookup<TKey>(IReadOnlyDictionary<TKey, string> map) {
+         var lookup = map.ToLookup(kv => kv.Value, kv => kv.Key);
+         return cell_text => lookup.Contains(cell_text) ? lookup[cell_text].First() : default;
+      }
+
+      static class Headers {
+         public const string
+            Security = "Security",
+            Account = "Account",
+            User = "User",
+            Side = "Side",
+            Quantity = "Quantity",
+            Price = "Price";
+      }
+
+      static class Cells {
+         public const char delimiter = ',';
+
+         public static RowParser.AssignColumnValue<ParsedManualFill> security(Func<string, uint> reverse_id_lookup) {
+            return impl;
+            void impl(ref ParsedManualFill pmf, string text) {
+               pmf.result.SecurityKey = reverse_id_lookup(text);
+               pmf.security = (text, pmf.result.SecurityKey != 0);
+            }
+         }
+
+         public static void side(ref ParsedManualFill pmf, string cell_text) {
+            switch (cell_text[0]) {
+               case 'B': pmf.result.Side = Side.Buy; break;
+               case 'S': pmf.result.Side = Side.Sell; break;
+               default: pmf.side = (cell_text, false); break;
+            }
+            pmf.side = (cell_text, true);
+         }
+
+         public static void quantity(ref ParsedManualFill pmf, string cell_text) {
+            if (uint.TryParse(cell_text, out uint v)) {
+               pmf.result.Quantity = v;
+               pmf.quantity = (cell_text, true);
+            } else {
+               pmf.quantity = (cell_text, false);
+            }
+         }
+
+         public static void price(ref ParsedManualFill pmf, string cell_text) {
+            if (double.TryParse(cell_text, out var v)) {
+               pmf.result.Price = v;
+               pmf.price = (cell_text, true);
+            } else {
+               pmf.price = (cell_text, false);
+            }
+         }
+
+         public static RowParser.AssignColumnValue<ParsedManualFill> account(Func<string, uint> reverse_id_lookup) {
+            return impl;
+            void impl(ref ParsedManualFill pmf, string text) {
+               pmf.result.AccountId = reverse_id_lookup(text);
+               pmf.account = (text, pmf.result.AccountId != 0);
+            }
+         }
+
+         public static RowParser.AssignColumnValue<ParsedManualFill> user(Func<string, uint> reverse_id_lookup) {
+            return impl;
+            void impl(ref ParsedManualFill pmf, string text) {
+               pmf.result.UserId = reverse_id_lookup(text);
+               pmf.user = (text, pmf.result.UserId != 0);
+            }
+         }
+      }
+   }
+}
@@ -0,0 +1,23 @@
+using mbts.ui;
+using ProtoBuf;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace bts.shell.manual_fills {
+   [ProtoContract]
+   class ManualFillsSettings {
+      [ProtoMember(1)]
+      readonly SortingCriteria[] _sorting_criterion;
+
+      public static ManualFillsSettings Default =>
+         new ManualFillsSettings(new[] { new SortingCriteria(nameof(mbts.ui.spark.ManualFillsView.Columns.Security), true) });
+
+      public ManualFillsSettings() { }
+
+      public ManualFillsSettings(IEnumerable<SortingCriteria> sorting_criterion) =>
+         _sorting_criterion = sorting_criterion.ToArray();
+
+      public IReadOnlyList<SortingCriteria> sorting_criterion => _sorting_criterion ?? Array.Empty<SortingCriteria>();
+   }
+}
@@ -0,0 +1,222 @@
+using bts.api;
+using bts.api.core;
+using bts.api.position;
+using bts.collections;
+using mbts;
+using mbts.spark;
+using mbts.ui;
+using mbts.ui.controls;
+using mbts.ui.shell;
+using mbts.ui.utility;
+using mbts.utils;
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Collections.Specialized;
+using System.ComponentModel;
+using System.IO;
+using System.Linq;
+using System.Reactive.Linq;
+using System.Threading.Tasks;
+using System.Windows.Data;
+using System.Windows.Input;
+using Disposable = mbts.Disposable;
+using ManualFillComponent = mbts.ui.spark.ManualFillsImportConflictsView.ManualFillComponent;
+
+namespace bts.shell.manual_fills {
+   enum EditableItemState {
+      None,       // Committed and not modified
+      Modified,   // Committed and modified
+      Uncommitted // Uncommitted (modified n/a)
+   }
+
+   class ManualFillsVM : DisposableViewModelBase {
+      const int _max_unconfirmed_removes = 16;
+      static readonly IComparer<ManualFillRow> _row_key_comparer = Comparer<ManualFillRow>.Create((a, b) => a.key.CompareTo(b.key));
+      readonly IBus _bus;
+      readonly ManualFillsModel _model;
+      readonly ObservableCollection<ManualFillRow>
+         _persisted_rows = new ObservableCollection<ManualFillRow>(),
+         _placeholder_rows = new ObservableCollection<ManualFillRow>();
+      long _placeholder_id_counter = long.MinValue;
+      IDisposable _import_fills_hooks;
+
+      public static ManualFillsVM create(IBus bus, OrdersModel model) =>
+         new ManualFillsVM(bus, new ManualFillsModel(model));
+
+      public ManualFillsVM(IBus bus, ManualFillsModel model) {
+         _bus = bus;
+         _model = model;
+         var merged_rows = new ObservableAggregateCollection<ManualFillRow>(_persisted_rows, _placeholder_rows);
+         rows_view = CollectionViewSource.GetDefaultView(merged_rows);
+         // mons
+         var dirty_mon = new ReactiveThresholdMonitor<ManualFillRow>(r => r.subscribe_is_dirty());
+         var selection_mon = new ReactiveThresholdMonitor<ManualFillRow>(r => r.subscribe_is_selected());
+         var placeholder_mon = new ReactiveThresholdMonitor<ManualFillRow>();
+         // commands
+         commit_all_fills_cmd = ObservantAsyncCommand.create(() => _commit_async(merged_rows), out var commit_all_fils_observer);
+         commit_selected_fills_cmd = ObservantAsyncCommand.create(() => _commit_async(selection_mon.filtered_items), out var commit_selected_fills_observer);
+         revert_all_cmd = ObservantCommand.create(() => revert(dirty_mon.filtered_items.ToList()), out var revert_all_observer);
+         revert_selected_fills_cmd = ObservantCommand.create(() => revert(selection_mon.filtered_items.ToList()), out var revert_selected_fills_observer);
+         remove_selected_fills_cmd = ObservantAsyncCommand.create(remove_selected_fills_async, out var remove_selected_fills_observer);
+         add_fill_cmd = new DelegateCommand<ManualFillRow>(_add_fill);
+         import_fills_cmd = FileDialogCommand.open_file(_import_fills, extensions: ManualFillsParser.file_extension);
+         //
+         var dirty_or_new_src = dirty_mon.CombineLatest(placeholder_mon, LogicalDelegates.Or);
+         _dispose = Disposable.Create(
+            RXCollection.connect(_persisted_rows,
+               _model.manual_fills.OnDispatcher(),
+               Observable.Return(Comparer<ManualFillData>.Create((a, b) => a.key.CompareTo(b.key))),
+               mfd => new ManualFillRow(mfd),
+               mfr => mfr.data),
+            _bus.subscribe(SparkTags.SecuritiesTag).OnDispatcher().Subscribe(m => {
+               security_map = m;
+               RaisePropertyChanged(nameof(security_map));
+            }),
+            ObservableAutoWrapper.connect_item_hooks(_persisted_rows, r => Disposable.Create(dirty_mon.join(r), selection_mon.join(r))),
+            ObservableAutoWrapper.connect_item_hooks(_placeholder_rows, r => Disposable.Create(selection_mon.join(r), placeholder_mon.join(r, Observable.Return(true)))),
+            // command param subs
+            dirty_mon.Subscribe(revert_all_observer),
+            dirty_or_new_src.OnDispatcher().Subscribe(commit_all_fils_observer),
+            selection_mon.Subscribe(remove_selected_fills_observer),
+            selection_mon.CombineLatest(dirty_mon, LogicalDelegates.And).OnDispatcher().Subscribe(revert_selected_fills_observer),
+            selection_mon.CombineLatest(dirty_or_new_src, LogicalDelegates.And).OnDispatcher().Subscribe(commit_selected_fills_observer),
+            // accounts/users subs
+            RXCollection.connect(accounts, model.accounts.OnDispatcher(), a => new AccountTuple?(a), a => a.Value, Comparer<AccountTuple>.Default),
+            RXCollection.connect(users, model.users.OnDispatcher(), u => new UserTuple?(u), u => u.Value, Comparer<UserTuple>.Default),
+            Disposable.Create(() => Disposable.dispose(ref _import_fills_hooks))
+         );
+         // local methods
+         void revert(IReadOnlyList<ManualFillRow> rows) {
+            foreach (var r in rows)
+               r.revert();
+         }
+         async Task remove_selected_fills_async() {
+            if (selection_mon.filtered_items.Count < _max_unconfirmed_removes || BTSMessageBox.Confirm($"Are you sure you want to delete {selection_mon.filtered_items.Count} fills?", "Delete Fills")) {
+               var persisted_fills = new List<ManualFill>();
+               foreach (var r in selection_mon.filtered_items.ToList()) {
+                  if (r.placeholder_key.HasValue)
+                     _placeholder_rows.RemoveSorted(r, _row_key_comparer);
+                  else persisted_fills.Add(r.to_man_fill());
+               }
+               await _model.delete_fills(persisted_fills);
+            }
+         }
+      }
+
+      public ICollectionView rows_view { get; }
+      // misc items sources
+      public IEnumerable<Side> sides => new[] { Side.Buy, Side.Sell };
+      public ObservableCollection<AccountTuple?> accounts { get; } = new ObservableCollection<AccountTuple?>();
+      public ObservableCollection<UserTuple?> users { get; } = new ObservableCollection<UserTuple?>();
+      public IReadOnlyDictionary<uint, SecurityMD> security_map { get; private set; } = DictionaryHelper.empty<uint, SecurityMD>();
+      // commands
+      public ICommand add_fill_cmd { get; }
+      public ICommand commit_all_fills_cmd { get; }
+      public ICommand commit_selected_fills_cmd { get; }
+      public ICommand import_fills_cmd { get; }
+      public ICommand remove_selected_fills_cmd { get; }
+      public ICommand revert_all_cmd { get; }
+      public ICommand revert_selected_fills_cmd { get; }
+
+      public ManualFillRow row_factory() =>
+         new ManualFillRow(
+            new ManualFillData(
+               new ManualFillKey(_placeholder_id_counter++),
+               new ManualFillTuple(new ManualFillImmutable(new ManualFill {
+                  Side = Side.Buy
+               }), null, accounts.FirstOrDefault(), users.FirstOrDefault())));
+
+      void _add_fill(ManualFillRow new_row) =>
+         _placeholder_rows.InsertSorted((new_row ?? (new_row = row_factory())).placeholder_key.HasValue ?
+            new_row : throw new InvalidOperationException("New row is already persisted."),
+            _row_key_comparer);
+
+      async Task _commit_async(IEnumerable<ManualFillRow> rows) {
+         var updates = new List<ManualFill>();
+         var adds = new List<(ManualFill man_fill, long pl_key)>();
+         foreach (var r in rows) {
+            if (r.is_dirty) {
+               updates.Add(r.to_man_fill());
+            } else if (r.placeholder_key.HasValue) {
+               adds.Add((r.to_man_fill(), r.placeholder_key.Value));
+            }
+         }
+         if (updates.Count > 0)
+            await _model.update_fills(updates);
+         if (adds.Count > 0) {
+            await _model.create_fills(adds.WrapSelector(r => r.man_fill, null));
+            _placeholder_rows
+               .WrapSelector(r => r.placeholder_key.Value, null)
+               .RemoveSorted(adds.Select(r => r.pl_key));
+         }
+      }
+
+      void _import_fills(string file_name) {
+         try {
+            var lines = File.ReadAllLines(file_name);
+            var parsed_fills = ManualFillsParser.parse_rows(
+               lines,
+               MappedDictionary.create(security_map, kv => kv.Value.security),
+               accounts.ToDictionary(a => a.Value.id, a => a.Value.name),
+               users.ToDictionary(u => u.Value.id, u => u.Value.name)
+            ).ToList();
+            var conflicts = ManualFillsParser.get_conflicts(parsed_fills);
+            if (conflicts.Values.Any(c => c.Count > 0)) {
+               // init vm
+               var vm = new ManualFillsImportVM(parsed_fills.Count) {
+                  security_map = security_map
+               };
+               // add rows
+               foreach (var kv in conflicts) {
+                  var assign_del = ManualFillsParser.assign_component(kv.Key);
+                  foreach (var text_groups in kv.Value) {
+                     var eval = get_error_value(kv.Key);
+                     var row = new ManualFillsImportVM.Row(kv.Key, text_groups.Key, text_groups.Value, eval, eval);
+                     vm.rows.Add(row);
+                     vm.import_request += () => {
+                        foreach (var pmf in text_groups.Value)
+                           assign_del(pmf.result, row.value);
+                     };
+                  }
+               }
+               var win = new mbts.ui.spark.ManualFillsImportConflictsDialog {
+                  DataContext = vm,
+                  Title = ManualFillsWindowFactory.window_name,
+                  Topmost = true
+               };
+               vm.RequestClose += (s, e) => Disposable.dispose(ref _import_fills_hooks);
+               vm.import_request += () => {
+                  add_imported_fills();
+                  Disposable.dispose(ref _import_fills_hooks);
+               };
+               Disposable.replace(ref _import_fills_hooks, Disposable.Create(
+                  ObservableAutoWrapper.connect(accounts, vm.accounts),
+                  ObservableAutoWrapper.connect(users, vm.users),
+                  vm,
+                  Disposable.Create(close)
+               ));
+               win.move_to_mouse(-200, -75);
+               win.Show();
+               void close() => WindowUtilities.force_close(win);
+               object get_error_value(ManualFillComponent component) {
+                  switch (component) {
+                     case ManualFillComponent.Price: return double.NaN;
+                     case ManualFillComponent.Size: return 0;
+                     default: return null;
+                  }
+               }
+            } else {
+               add_imported_fills();
+            }
+            void add_imported_fills() =>
+               _placeholder_rows.InsertSorted(parsed_fills.Select(pmf => new ManualFillRow(new ManualFillData(new ManualFillKey(_placeholder_id_counter++), new ManualFillTuple(new ManualFillImmutable(pmf.result),
+                  pmf.result.SecurityKey != 0 && security_map.TryGetValue(pmf.result.SecurityKey, out var smd) ? smd.security : (SecurityImmutable?)null,
+                  accounts.FirstOrDefault(a => a?.id == pmf.result.AccountId),
+                  users.FirstOrDefault(a => a?.id == pmf.result.UserId))))), _row_key_comparer);
+         } catch (Exception ex) {
+            BTSMessageBox.Error($"Error importing fills: {ex}.", ManualFillsWindowFactory.window_name);
+         }
+      }
+   }
+}
@@ -0,0 +1,248 @@
+<UserControl
+  x:Class="mbts.ui.spark.ManualFillsView"
+  x:ClassModifier="internal"
+  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+  xmlns:u="clr-namespace:mbts.ui"
+  xmlns:c="clr-namespace:mbts.ui.controls"
+  xmlns:cv="clr-namespace:mbts.ui.converters"
+  xmlns:usp="clr-namespace:mbts.ui.spark"
+>
+  <AdornerDecorator>
+    <Grid>
+      <DataGrid
+        x:Name="data_grid"
+        u:DataGridBehavior.SingleClickEdit="True"
+        AutoGenerateColumns="False"
+        CanUserAddRows="False"
+        CanUserDeleteRows="False"
+        CanUserReorderColumns="False"
+        CanUserSortColumns="True"
+        HeadersVisibility="All"
+        ItemsSource="{Binding rows_view}"
+        MinRowHeight="17"
+        RowHeaderWidth="22"
+      >
+        <!--Row Header Style-->
+        <DataGrid.RowHeaderStyle>
+          <Style TargetType="DataGridRowHeader">
+            <Setter Property="Content" Value="{Binding}"/>
+            <Setter Property="ContentTemplate">
+              <Setter.Value>
+                <DataTemplate>
+                  <Border x:Name="Root">
+                    <u:StateManager.VisualState>
+                      <MultiBinding Converter="{x:Static usp:ManualFillsView.RowHeaderVisualStateConverter}">
+                        <Binding Path="editable_item_state"/>
+                        <Binding Path="is_valid"/>
+                      </MultiBinding>
+                    </u:StateManager.VisualState>
+                    <VisualStateManager.VisualStateGroups>
+                      <VisualStateGroup>
+                        <VisualState Name="None"/>
+                        <VisualState Name="Modified">
+                          <Storyboard>
+                            <DoubleAnimation Storyboard.TargetName="pencil" Storyboard.TargetProperty="(UIElement.Opacity)" BeginTime="0" Duration="0" To="0.7"/>
+                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="Root" Storyboard.TargetProperty="(FrameworkElement.ToolTip)">
+                              <DiscreteObjectKeyFrame KeyTime="0" Value="Fill has modified properties."/>
+                            </ObjectAnimationUsingKeyFrames>
+                          </Storyboard>
+                        </VisualState>
+                        <VisualState Name="Uncommitted">
+                          <Storyboard>
+                            <ColorAnimation Storyboard.TargetName="new_item" Storyboard.TargetProperty="(usp:ManualFillsView.ImageBrush).(SolidColorBrush.Color)" BeginTime="0" Duration="0" To="#B3006000"/>
+                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="Root" Storyboard.TargetProperty="(FrameworkElement.ToolTip)">
+                              <DiscreteObjectKeyFrame KeyTime="0" Value="New Fill."/>
+                            </ObjectAnimationUsingKeyFrames>
+                          </Storyboard>
+                        </VisualState>
+                        <VisualState Name="Error">
+                          <Storyboard>
+                            <DoubleAnimation Storyboard.TargetName="exclamation" Storyboard.TargetProperty="(UIElement.Opacity)" BeginTime="0" Duration="0" To="1"/>
+                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="Root" Storyboard.TargetProperty="(FrameworkElement.ToolTip)">
+                              <DiscreteObjectKeyFrame KeyTime="0" Value="Fill has invalid properties."/>
+                            </ObjectAnimationUsingKeyFrames>
+                          </Storyboard>
+                        </VisualState>
+                        <VisualState Name="ErrorUncommitted">
+                          <Storyboard>
+                            <ColorAnimation Storyboard.TargetName="new_item" Storyboard.TargetProperty="(usp:ManualFillsView.ImageBrush).(SolidColorBrush.Color)" BeginTime="0" Duration="0" To="#CCCD4848"/>
+                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="Root" Storyboard.TargetProperty="(FrameworkElement.ToolTip)">
+                              <DiscreteObjectKeyFrame KeyTime="0" Value="New Fill has invalid properties."/>
+                            </ObjectAnimationUsingKeyFrames>
+                          </Storyboard>
+                        </VisualState>
+                      </VisualStateGroup>
+                    </VisualStateManager.VisualStateGroups>
+                    <Grid>
+                      <Image x:Name="new_item" usp:ManualFillsView.ImageBrush="Transparent" Height="14">
+                        <Image.Source>
+                          <DrawingImage>
+                            <DrawingImage.Drawing>
+                              <GeometryDrawing Brush="{Binding Path='(usp:ManualFillsView.ImageBrush)', ElementName=new_item}" Geometry="{Binding Source={StaticResource {x:Static u:Icons.DocumentAddGeometryKey}}}"/>
+                            </DrawingImage.Drawing>
+                          </DrawingImage>
+                        </Image.Source>
+                      </Image>
+                      <Image x:Name="exclamation" Height="14" Opacity="0">
+                        <Image.Source>
+                          <Binding Source="{x:Static MessageBoxImage.Exclamation}">
+                            <Binding.Converter>
+                              <cv:SystemIconConverter/>
+                            </Binding.Converter>
+                          </Binding>
+                        </Image.Source>
+                      </Image>
+                      <Image x:Name="pencil" Height="14" Source="{x:Static u:Icons.Pencil}" Opacity="0">
+                        <Image.RenderTransform>
+                          <RotateTransform Angle="45" CenterX="0" CenterY="7"/>
+                        </Image.RenderTransform>
+                      </Image>
+                    </Grid>
+                  </Border>
+                </DataTemplate>
+              </Setter.Value>
+            </Setter>
+          </Style>
+        </DataGrid.RowHeaderStyle>
+        <!--Cell Style-->
+        <DataGrid.CellStyle>
+          <Style TargetType="DataGridCell" BasedOn="{StaticResource DataGridCellBaseStyle}">
+            <Setter Property="VerticalContentAlignment" Value="Stretch"/>
+          </Style>
+        </DataGrid.CellStyle>
+        <!--Row Style-->
+        <DataGrid.RowStyle>
+          <Style TargetType="DataGridRow">
+            <Setter Property="IsSelected" Value="{Binding is_selected, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
+            <Style.Triggers>
+              <DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource Self}}" Value="True">
+                <Setter Property="Background" Value="{StaticResource SelectedRowBackground}"/>
+              </DataTrigger>
+            </Style.Triggers>
+          </Style>
+        </DataGrid.RowStyle>
+        <DataGrid.Columns>
+          <!--Record ID-->
+          <DataGridTextColumn c:DataGridEx.CellKey="{x:Static RecordID, MemberType={u:Nested usp:ManualFillsView.Columns}}" Header="ID" Binding="{Binding record_id_display_text}" SortMemberPath="record_id" IsReadOnly="True"/>
+          <!---Security-->
+          <DataGridTemplateColumn c:DataGridEx.CellKey="{x:Static Security, MemberType={u:Nested usp:ManualFillsView.Columns}}" Header="Security" SortMemberPath="security">
+            <DataGridTemplateColumn.CellTemplate>
+              <DataTemplate>
+                <TextBlock Text="{Binding security}" VerticalAlignment="Center"/>
+              </DataTemplate>
+            </DataGridTemplateColumn.CellTemplate>
+            <DataGridTemplateColumn.CellEditingTemplate>
+              <DataTemplate>
+                <c:ContractPickerPopup
+                  HorizontalAlignment="Stretch"
+                  VerticalAlignment="Stretch"
+                  CloseOnCancel="True"
+                  CloseOnOK="True"
+                  Header="{Binding security}"
+                  IsEditMode="False"
+                  IsLazy="True"
+                  SecurityMap="{Binding DataContext.security_map, RelativeSource={RelativeSource AncestorType=DataGrid}, Mode=OneWay}"
+                  SelectedSecurity="{Binding security, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
+                  ShowDialogSkirt="True"
+                  ToolTip="{Binding SelectedCriteria, RelativeSource={RelativeSource Self}, Converter={x:Static c:ContractPickerPopup.SecurityCriteriaTextConverter}, Mode=OneWay}"
+                />
+              </DataTemplate>
+            </DataGridTemplateColumn.CellEditingTemplate>
+          </DataGridTemplateColumn>
+          <!--Account-->
+          <DataGridTemplateColumn c:DataGridEx.CellKey="{x:Static Account, MemberType={u:Nested usp:ManualFillsView.Columns}}" Header="Account" SortMemberPath="account">
+            <DataGridTemplateColumn.CellTemplate>
+              <DataTemplate>
+                <TextBlock Text="{Binding account}" VerticalAlignment="Center"/>
+              </DataTemplate>
+            </DataGridTemplateColumn.CellTemplate>
+            <DataGridTemplateColumn.CellEditingTemplate>
+              <DataTemplate>
+                <Grid>
+                  <ComboBox
+                    x:Name="mutable_view"
+                    ItemsSource="{Binding DataContext.accounts, RelativeSource={RelativeSource AncestorType=DataGrid}}"
+                    SelectedItem="{Binding account, UpdateSourceTrigger=PropertyChanged}"
+                    Visibility="Visible"
+                  />
+                  <TextBlock
+                    x:Name="readonly_view"
+                    Text="{Binding account}"
+                    VerticalAlignment="Center"
+                    Visibility="Collapsed"
+                  />
+                </Grid>
+                <DataTemplate.Triggers>
+                  <DataTrigger Binding="{Binding placeholder_key}" Value="{x:Null}">
+                    <Setter TargetName="mutable_view" Property="Visibility" Value="Collapsed"/>
+                    <Setter TargetName="readonly_view" Property="Visibility" Value="Visible"/>
+                  </DataTrigger>
+                </DataTemplate.Triggers>
+              </DataTemplate>
+            </DataGridTemplateColumn.CellEditingTemplate>
+          </DataGridTemplateColumn>
+          <!--User-->
+          <DataGridTemplateColumn c:DataGridEx.CellKey="{x:Static User, MemberType={u:Nested usp:ManualFillsView.Columns}}" Header="User" SortMemberPath="user">
+            <DataGridTemplateColumn.CellTemplate>
+              <DataTemplate>
+                <TextBlock Text="{Binding user}" VerticalAlignment="Center"/>
+              </DataTemplate>
+            </DataGridTemplateColumn.CellTemplate>
+            <DataGridTemplateColumn.CellEditingTemplate>
+              <DataTemplate>
+                <ComboBox ItemsSource="{Binding DataContext.users, RelativeSource={RelativeSource AncestorType=DataGrid}}" SelectedItem="{Binding user, UpdateSourceTrigger=PropertyChanged}"/>
+              </DataTemplate>
+            </DataGridTemplateColumn.CellEditingTemplate>
+          </DataGridTemplateColumn>
+          <!--Side-->
+          <DataGridTemplateColumn c:DataGridEx.CellKey="{x:Static Side, MemberType={u:Nested usp:ManualFillsView.Columns}}" Header="Side" SortMemberPath="side">
+            <DataGridTemplateColumn.CellTemplate>
+              <DataTemplate>
+                <TextBlock Text="{Binding side}" VerticalAlignment="Center"/>
+              </DataTemplate>
+            </DataGridTemplateColumn.CellTemplate>
+            <DataGridTemplateColumn.CellEditingTemplate>
+              <DataTemplate>
+                <ComboBox ItemsSource="{Binding DataContext.sides, RelativeSource={RelativeSource AncestorType=DataGrid}}" SelectedItem="{Binding side, UpdateSourceTrigger=PropertyChanged}"/>
+              </DataTemplate>
+            </DataGridTemplateColumn.CellEditingTemplate>
+          </DataGridTemplateColumn>
+          <!--Size-->
+          <DataGridTemplateColumn c:DataGridEx.CellKey="{x:Static Size, MemberType={u:Nested usp:ManualFillsView.Columns}}" Header="Qty" SortMemberPath="side">
+            <DataGridTemplateColumn.CellTemplate>
+              <DataTemplate>
+                <TextBlock Text="{Binding size}" VerticalAlignment="Center"/>
+              </DataTemplate>
+            </DataGridTemplateColumn.CellTemplate>
+            <DataGridTemplateColumn.CellEditingTemplate>
+              <DataTemplate>
+                <c:TickUpDownUInt MinWidth="40" Value="{Binding size, UpdateSourceTrigger=PropertyChanged}"/>
+              </DataTemplate>
+            </DataGridTemplateColumn.CellEditingTemplate>
+          </DataGridTemplateColumn>
+          <!--Price-->
+          <DataGridTemplateColumn c:DataGridEx.CellKey="{x:Static Price, MemberType={u:Nested usp:ManualFillsView.Columns}}" Header="Price" SortMemberPath="price">
+            <DataGridTemplateColumn.CellTemplate>
+              <DataTemplate>
+                <TextBlock VerticalAlignment="Center">
+                  <TextBlock.Text>
+                    <MultiBinding Converter="{StaticResource TickDisplayConverter}">
+                      <Binding Path="price"/>
+                      <Binding Path="spec"/>
+                    </MultiBinding>
+                  </TextBlock.Text>
+                </TextBlock>
+              </DataTemplate>
+            </DataGridTemplateColumn.CellTemplate>
+            <DataGridTemplateColumn.CellEditingTemplate>
+              <DataTemplate>
+                <usp:PriceEntryControl ContractSpec="{Binding spec}" Value="{Binding price, UpdateSourceTrigger=PropertyChanged}" AlwaysReformatOnSpecChange="True"/>
+              </DataTemplate>
+            </DataGridTemplateColumn.CellEditingTemplate>
+          </DataGridTemplateColumn>
+        </DataGrid.Columns>
+      </DataGrid>
+    </Grid>
+  </AdornerDecorator>
+</UserControl>
@@ -0,0 +1,97 @@
+using bts.shell.manual_fills;
+using mbts.ui.controls.adorners;
+using mbts.ui.converters;
+using mbts.utils;
+using System;
+using System.Reactive.Disposables;
+using System.Reactive.Linq;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Input;
+using System.Windows.Media;
+
+namespace mbts.ui.spark {
+   /// <summary>
+   /// Interaction logic for ManualFillsView.xaml
+   /// </summary>
+   partial class ManualFillsView : UserControl {
+      public static readonly IMultiValueConverter
+         RowHeaderVisualStateConverter = ValueConverter.create<EditableItemState, bool, string>(
+            (edit_state, is_valid) => is_valid ? edit_state.ToString() : edit_state == EditableItemState.Uncommitted ? "ErrorUncommitted" : "Error");
+
+      public enum Columns {
+         RecordID,
+         Security,
+         Account,
+         User,
+         Side,
+         Size,
+         Price
+      }
+
+      IDisposable _transaction;
+
+      public ManualFillsView() =>
+         InitializeComponent();
+
+      public static readonly DependencyProperty ImageBrushProperty =
+         DependencyProperty.RegisterAttached("ImageBrush", typeof(Brush), typeof(ManualFillsView));
+
+      public static Brush GetImageBrush(DependencyObject d) => d.GetValue(ImageBrushProperty) as Brush;
+      public static void SetImageBrush(DependencyObject d, Brush value) => d.SetValue(ImageBrushProperty, value);
+
+      public void begin_add_fill() {
+         if (!(DataContext is ManualFillsVM vm))
+            return;
+         Disposable.dispose(ref _transaction);
+         var row = vm.row_factory();
+         var row_editor = new ManualFillRowEditor { DataContext = row };
+         row_editor.CommandBindings.Add(new CommandBinding(ManualFillRowEditor.CommitCommand, commit_executed));
+         row_editor.CommandBindings.Add(new CommandBinding(ManualFillRowEditor.CancelCommand, cancel_executed));
+         // dynamic resources
+         row_editor.Resources[ManualFillRowEditor.AccountsKey] = vm.accounts;
+         row_editor.Resources[ManualFillRowEditor.UsersKey] = vm.users;
+         row_editor.Resources[ManualFillRowEditor.SidesKey] = vm.sides;
+         FocusManager.SetIsFocusScope(row_editor, true);
+         var sec_hook = vm.as_demuxer().subscribe(nameof(ManualFillsVM.security_map)).OnDispatcher().Subscribe(v => row_editor.Resources[ManualFillRowEditor.SecuritiesKey] = v);
+         // popup adorner
+         var popup_adorner = new PopupAdorner(
+           data_grid, data_grid,
+           new Border {
+              Child = row_editor,
+              Background = BTSColors.common_background_brush,
+              BorderBrush = Brushes.Black,
+              BorderThickness = new Thickness(1),
+              Padding = new Thickness(0, 6, 0, 0),
+              HorizontalAlignment = HorizontalAlignment.Left,
+              VerticalAlignment = VerticalAlignment.Top
+           },
+           HorizontalPosition.Middle,
+           VerticalPosition.Middle,
+           0,
+           22) {
+            OpenRelativeToMouse = true,
+            EnableDragMove = true,
+            ClipToBounds = true
+         };
+         popup_adorner.attach();
+         popup_adorner.IsOpen = true;
+         row_editor.Focus();
+         _transaction = new CompositeDisposable(sec_hook) { destroy_popup };
+         // local methods
+         void commit_executed(object sender, ExecutedRoutedEventArgs e) {
+            vm.add_fill_cmd?.TryExecuteIfCan(row);
+            Disposable.dispose(ref _transaction);
+         }
+         void cancel_executed(object sender, ExecutedRoutedEventArgs e) {
+            row.revert();
+            Disposable.dispose(ref _transaction);
+         }
+         void destroy_popup() {
+            popup_adorner.IsOpen = false;
+            popup_adorner.detach();
+         }
+      }
+   }
+}
@@ -0,0 +1,133 @@
+using bts.api;
+using bts.shell.manual_fills;
+using bts.spark;
+using mbts;
+using mbts.collections;
+using mbts.spark;
+using mbts.ui;
+using mbts.ui.controls;
+using mbts.ui.spark;
+using System;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+using System.ComponentModel;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+
+namespace bts.shell {
+   class ManualFillsWindowFactory : ShellWindowFactory<ManualFillsSettings> {
+      public const string
+         window_type = "ManualFills",
+         window_name = "Manual Fills";
+      const double _window_min_width = 466;
+
+      readonly IBus _bus;
+      readonly OrdersModel _orders_model;
+      readonly ManualFillsConfig _manual_fills_conf = ManualFillsConfig.read();
+
+      public ManualFillsWindowFactory(IShellModule owner, IBus bus, OrdersModel orders_model) : base(owner, window_name) {
+         _bus = bus;
+         _orders_model = orders_model;
+         _dispose = bus.subscribe(SparkTags.ShowManualFillsTag).Subscribe(open_window);
+         //
+         async void open_window(ManualFillsSettings state) =>
+            _bus.post(SparkTags.ShowWindow, await load(state));
+      }
+
+      public override Task<IShellWindow> load(ManualFillsSettings settings) {
+         return Task.FromResult<IShellWindow>(SparkWindow<ManualFillsSettings>.create(
+            window_type, window_name, _bus, this, Icons.DataEdit, _manual_fills_conf.thread_id, thread_init, _window_min_width));
+         //
+         (UIElement, IEnumerable<SparkCommand>, Func<ManualFillsSettings>, IDisposable) thread_init() {
+            var vm = ManualFillsVM.create(_bus, _orders_model);
+            var view = new ManualFillsView { DataContext = vm };
+            view.data_grid.Sorting += on_sorting;
+            IReadOnlyList<SortingCriteria> last_sorting_criterion = Array.Empty<SortingCriteria>();
+            using (apply_sort()) {
+               var col_sort_tuples =
+                  from sc in settings.sorting_criterion
+                  join col in view.data_grid.Columns on sc.col_name equals _col_id(col)
+                  select (col, sc);
+               foreach (var (col, sc) in col_sort_tuples) {
+                  col.SortDirection = sc.direction();
+                  vm.rows_view.SortDescriptions.Add(new SortDescription(col.SortMemberPath, sc.direction()));
+               }
+            }
+            var cmds = new[] {
+               new SparkCommandCommand("Add New", Icons.AddBoxes, _manual_fills_conf.modal_transactions ? new DelegateCommand(() => view.begin_add_fill()) : vm.add_fill_cmd) { group = CommandGroups.Add },
+               new SparkCommandCommand("Import Fills", Icons.Import, vm.import_fills_cmd) { group = CommandGroups.Add },
+               new SparkCommandCommand("Revert Selected", Icons.UndoCircular,vm.revert_selected_fills_cmd) { group = CommandGroups.Revert, show_in_toolbar = false },
+               new SparkCommandCommand("Revert All", Icons.UndoCircular, vm.revert_all_cmd) { group = CommandGroups.Revert },
+               new SparkCommandCommand("Save Selected", Icons.Disk, vm.commit_selected_fills_cmd) { group = CommandGroups.Save, show_in_toolbar = false },
+               new SparkCommandCommand("Save All", Icons.Disk, vm.commit_all_fills_cmd) { group = CommandGroups.Save },
+               new SparkCommandCommand("Delete Selected", Icons.Trash, vm.remove_selected_fills_cmd)
+            };
+            return (view, cmds, get_settings, Disposable.Create(
+               vm.rows_view.subscribe_sorting_criterion(sm => view.data_grid.Columns.TryGetFirst(dc => dc.SortMemberPath == sm, out DataGridColumn match) ? _col_id(match) : null)
+               .Subscribe(sc => last_sorting_criterion = sc),
+               vm));
+            //
+            void on_sorting(object sender, DataGridSortingEventArgs e) {
+               e.Handled = true;
+               using (apply_sort()) {
+                  var new_sort_desc = new SortDescription(e.Column.SortMemberPath, e.Column.SortDirection == ListSortDirection.Ascending ? ListSortDirection.Descending : ListSortDirection.Ascending);
+                  e.Column.SortDirection = new_sort_desc.Direction;
+                  if (KeyboardExtensions.IsShiftDown()) {
+                     if (vm.rows_view.SortDescriptions.TryGetFirst(sd => sd.PropertyName == e.Column.SortMemberPath, out var match, out int index)) {
+                        vm.rows_view.SortDescriptions[index] = new_sort_desc;
+                     } else {
+                        vm.rows_view.SortDescriptions.Add(new_sort_desc);
+                     }
+                  } else {
+                     vm.rows_view.SortDescriptions.Clear();
+                     foreach (var col in view.data_grid.Columns.Except(new[] { e.Column }))
+                        col.SortDirection = null;
+                     vm.rows_view.SortDescriptions.Add(new_sort_desc);
+                  }
+               }
+            }
+            /// Ensures that the primary sort description property (i.e., at index 0) is the placeholder_key.
+            /// This behavior has the effect of grouping placeholder rows at the bottom, without using <see cref="ICollectionView.GroupDescriptions"/> (which is incompatible with row virtualization).
+            IDisposable apply_sort() =>
+               Disposable.Create(() => {
+                  var pk_sort_desc = new SortDescription(nameof(ManualFillRow.placeholder_key), ListSortDirection.Ascending);
+                  if (vm.rows_view.SortDescriptions.Count > 0) {
+                     if (vm.rows_view.SortDescriptions[0].Equals(pk_sort_desc))
+                        return;
+                     vm.rows_view.SortDescriptions.removeFirst(sd => sd.PropertyName == pk_sort_desc.PropertyName);
+                  }
+                  vm.rows_view.SortDescriptions.Insert(0, pk_sort_desc);
+               });
+
+            ManualFillsSettings get_settings() =>
+               new ManualFillsSettings(last_sorting_criterion);
+         }
+      }
+
+      static string _col_id(DataGridColumn col) =>
+         DataGridEx.GetCellKey(col)?.ToString();
+
+      readonly struct ManualFillsConfig {
+         public readonly bool modal_transactions;
+         public readonly string thread_id;
+
+         ManualFillsConfig(string thread_id, bool modal_transactions) {
+            this.thread_id = thread_id;
+            this.modal_transactions = modal_transactions;
+         }
+
+         public static ManualFillsConfig read() => new ManualFillsConfig(
+            mbts.config.Configuration.get<bts.config.MultiThreadedWindows>().manual_fills ? window_type : null,
+            mbts.config.Configuration.get<bts.config.ManualFillsOptions>().modal_transactions);
+      }
+
+      static class CommandGroups {
+         public const string
+            Add = "Add",
+            Save = "Save",
+            Revert = "Revert";
+      }
+   }
+}
@@ -14,7 +14,6 @@
             xmlns:order="clr-namespace:bts.api.orderman;assembly=spark_api"
             mc:Ignorable="d"
             MaxHeight="240"
-             MinWidth="875"
             d:DesignHeight="600" d:DesignWidth="1080"
             FocusManager.IsFocusScope="True"
             Background="{StaticResource CommonBackground}">
@@ -99,7 +98,16 @@
            </MultiDataTrigger.Setters>
          </MultiDataTrigger>
        </Style.Triggers>
-
+        <!-- We added this IsSelected after seeing some strangeness  when bringing up the Mini OB,
+        then clicking the attach button, then performing a click to modify a param in the popup, the grid
+        would lose the appearance of its selected row. I think this was actually a result of a bad path
+        in the SelectionHighlight expression below, but that leaves me questioning how if it was bad (and
+        it was, I confirmed in Snoop) did the Grid successfully show a highlighted row in the first place.
+        
+        At any rate, I have a strong suspicion this Setter is no longer necessary, but I am too exhausted
+        and scared to remove it at this point.
+        -->
+        <Setter Property="IsSelected" Value="{Binding is_selected, Mode=TwoWay}" />
      </Style>
      <DataTemplate x:Key="{x:Static sp:MiniOrderBookView.RowTemplateKey}">
        <sp:MiniOrderBookRowView/>
@@ -121,10 +129,9 @@
      Rows="{Binding rows}"
      RowStyle="{StaticResource {x:Static sp:MiniOrderBookView.RowStyleKey}}"
      RowTemplate="{StaticResource {x:Static sp:MiniOrderBookView.RowTemplateKey}}"
-      SelectionHighlight="{Binding grid_settings_manager.selection_highlight, Mode=OneWay}"
+      SelectionHighlight="{Binding grid_settings_manager.core_manager.selection_highlight, Mode=OneWay}"
      RowsHorizontalScrollBarVisibility="Collapsed"
      RowHeight="20" 
-      SelectionMode="Single"
    >
        <c:DIYGrid.Resources>
          <ResourceDictionary>
@@ -1,5 +1,6 @@
 using bts;
 using bts.api;
+using bts.api.core;
 using bts.api.orderman;
 using bts.shell.orderbook;
 using bts.utils;
@@ -27,12 +28,13 @@ using Columns = mbts.spark.OrderBookGridView.ColumnKeys;
 using static mbts.ui.controls.DIYGrid;
 using OrderType = bts.api.orderman.CustomOrderDefinition.CustomOneofCase;
 using System.Windows.Input;
+using System.Reactive.Disposables;

 namespace mbts.spark {
   // This interface is used to hide ColumnBase.SortDirection, and offer a SortDirection member that does NOT require a DependencyProperty lookup.
   interface ICVOrderBookColumn : IKeyedColumn<Columns>, IGridColumn {
      ListSortDirection? SortDirection { get; set; }
-      IDataGridColumnFilter<OrderSecurityAlgoMeta> filter { get; }
+      IDataGridColumnFilter<OrderSecurity> filter { get; }
      IComparer<OrderBookRowVM> comparer { get; }
   }

@@ -63,11 +65,12 @@ namespace mbts.spark {
   partial class OrderBookVM {
      public class OrderBookColumnCollection : ObservableCollection<ColumnBase>, IValueFactory<(FilterStates filters, IReadOnlyList<SortingCriteria> sorting)>, IDisposable {
         readonly List<ICVOrderBookColumn> _active_comparers = new List<ICVOrderBookColumn>();
+         CompositeDisposable _resources = new CompositeDisposable();

         public OrderBookColumnCollection(IBus bus, OrdersModel model, IObservable<(IEnumerable<SecurityImmutable> added, IEnumerable<SecurityImmutable> removed)> order_securities) {
            // security
            Add(security_column = new SecurityColumn(
-               DiscreteValuesFilterVM.Create<OrderSecurityAlgoMeta, SecurityImmutable, SecurityCriteria>(
+               DiscreteValuesFilterVM.Create<OrderSecurity, SecurityImmutable, SecurityCriteria>(
                  order_securities,
                  ort => ort.security ?? SecurityDataHelper.Defaults.SecurityImmutable,
                  SecurityCriteria.from_securities,
@@ -82,7 +85,7 @@ namespace mbts.spark {
               DefaultColumnHeaders.Symbol,
               r => r.symbol,
               DefaultColumnWidths.Symbol,
-               DiscreteValuesFilterVM.Create<OrderSecurityAlgoMeta, string>(
+               DiscreteValuesFilterVM.Create<OrderSecurity, string>(
                  mbts.co2.UserSymbol.get_all().Select(u => u.symbol).Distinct().ToList(),
                  ort => ort.security?.Symbol ?? string.Empty,
                  nameof(OrderBookRowVM.symbol)
@@ -95,7 +98,7 @@ namespace mbts.spark {
               "Time",
               r => r.time_created_text,
               DefaultColumnWidths.Time,
-               new TimeFilterVM<OrderSecurityAlgoMeta>(
+               new TimeFilterVM<OrderSecurity>(
                  ort => ort.order.created(),
                  nameof(OrderBookRowVM.time_created)),
               DataGridFilterKnownTemplates.TimeFilter,
@@ -106,7 +109,7 @@ namespace mbts.spark {
               "Last Change",
               r => r.last_change_text,
               DefaultColumnWidths.Time,
-               new TimeFilterVM<OrderSecurityAlgoMeta>(
+               new TimeFilterVM<OrderSecurity>(
                  ort => ort.order.last_change(),
                  nameof(OrderBookRowVM.last_change)),
               DataGridFilterKnownTemplates.TimeFilter,
@@ -117,7 +120,7 @@ namespace mbts.spark {
               DefaultColumnHeaders.User,
               r => r.user,
               DefaultColumnWidths.User,
-               DiscreteValuesFilterVM.Create<OrderSecurityAlgoMeta, string>(
+               DiscreteValuesFilterVM.Create<OrderSecurity, string>(
                  model.factory.subscribe_users().Select(d => d.Values),
                  ort => ort.order.user(),
                  nameof(OrderBookRowVM.user)),
@@ -129,7 +132,7 @@ namespace mbts.spark {
               DefaultColumnHeaders.Account,
               r => r.account,
               DefaultColumnWidths.Account,
-               DiscreteValuesFilterVM.Create<OrderSecurityAlgoMeta, string, string[]>(
+               DiscreteValuesFilterVM.Create<OrderSecurity, string, string[]>(
                  model.factory.subscribe_accounts().Select(d => d.Values),
                  ort => ort.order.account(),
                  vals => vals.ToArray(),
@@ -143,7 +146,7 @@ namespace mbts.spark {
               DefaultColumnHeaders.Exchange,
               r => r.exchange.ToString(),
               DefaultColumnWidths.Exchange,
-               DiscreteValuesFilterVM.Create<OrderSecurityAlgoMeta, Venue>(
+               DiscreteValuesFilterVM.Create<OrderSecurity, Venue>(
                  EnumHelper.get_values_except(Venue.Unset).ToList(),
                  ort => ort.security.exchange_or_default(),
                  nameof(OrderBookRowVM.exchange)),
@@ -155,25 +158,48 @@ namespace mbts.spark {
               DefaultColumnHeaders.TimeInForce,
               r => r.time_in_force.ToString(),
               DefaultColumnWidths.TimeInForce,
-               DiscreteValuesFilterVM.Create<OrderSecurityAlgoMeta, TimeInForce>(
+               DiscreteValuesFilterVM.Create<OrderSecurity, TimeInForce>(
                  EnumHelper.get_values<TimeInForce>().ToList(),
                  ort => ort.order.time_in_force(),
                  nameof(OrderBookRowVM.time_in_force)),
               DataGridFilterKnownTemplates.EnumValues,
               _wrap_comparer(r => r.time_in_force)));
+            // (algo items)
+            var algo_items_source = model.subscribe_all_algos().SelectKeyValue(AlgoDataVM.from_data, d => AlgoID.from_algo_key(d.data.key, model.dynamic_helper.dynamic_type_index)).OnDispatcher();
+            var algo_items_comp = AlgoCollectionHelper.algo_data_vm_comparer.to_non_generic();
+            var algo_items_group_desc = new PropertyGroupDescription(nameof(AlgoDataVM.group));
            // order type
            Add(order_type_column = new OrderBookOrderTypeColumn(
-               DiscreteValuesFilterVM.Create<OrderSecurityAlgoMeta, OrderType>(
-                  utilities.OrderDataHelper.all_order_types,
-                  ort => ort.order.order_type(),
-                  nameof(OrderBookRowVM.order_type))));
+               Columns.OrderType,
+               nameof(OrderBookRowVM.badge_fill),
+               nameof(OrderBookRowVM.display_name),
+               _wrap_comparer(r => r.order_type),
+               DiscreteValuesFilterVM.CreateTableUpdate<OrderSecurity, AlgoDataVM, AlgoID>(
+                  o => new AlgoDataVM(o.algo.GetValueOrDefault()),
+                  vm => AlgoID.from_algo_key(vm.data.key, model.dynamic_helper.dynamic_type_index), out var order_type_filter_observer, out var order_type_items_view)));
+            _resources.Add(algo_items_source.Subscribe(order_type_filter_observer));
+            order_type_items_view.CustomSort = algo_items_comp;
+            order_type_items_view.GroupDescriptions.Add(algo_items_group_desc);
+            // root algo type
+            Add(root_algo_type_column = new OrderBookOrderTypeColumn(
+               Columns.RootAlgoType,
+               nameof(OrderBookRowVM.root_algo_badge_fill),
+               nameof(OrderBookRowVM.root_algo_display_name),
+               _wrap_comparer(r => r.order_tuple.root_algo.value.CustomCase),
+              DiscreteValuesFilterVM.CreateTableUpdate<OrderSecurity, AlgoDataVM, AlgoID>(
+                  o => new AlgoDataVM(o.root_algo),
+                  vm => AlgoID.from_algo_key(vm.data.key, model.dynamic_helper.dynamic_type_index), out var root_algo_type_observer, out var root_algo_type_items_view),
+               DefaultColumnHeaders.RootAlgoType));
+            _resources.Add(algo_items_source.Subscribe(root_algo_type_observer));
+            root_algo_type_items_view.CustomSort = algo_items_comp;
+            root_algo_type_items_view.GroupDescriptions.Add(algo_items_group_desc);
            // order sub type
            Add(sub_type_column = new SimpleTextColumn<OrderSubType[]>(
               Columns.SubType,
               "Sub Type",
               r => r.order_sub_type_text,
               80,
-               DiscreteValuesFilterVM.Create<OrderSecurityAlgoMeta, OrderSubType>(
+               DiscreteValuesFilterVM.Create<OrderSecurity, OrderSubType>(
                  EnumHelper.get_values<OrderSubType>().ToList(),
                  ort => ort.order.sub_type(),
                  nameof(OrderBookRowVM.order_sub_type)),
@@ -181,27 +207,27 @@ namespace mbts.spark {
               _wrap_comparer(r => r.order_sub_type)));
            // side
            Add(side_column = new SideColumn(
-               DiscreteValuesFilterVM.Create<OrderSecurityAlgoMeta, Side>(
+               DiscreteValuesFilterVM.Create<OrderSecurity, Side>(
                  new[] { Side.Buy, Side.Sell },
-                  ort=> ort.order.side(),
+                  ort => ort.order.side(),
                  nameof(OrderBookRowVM.side))));
            // quantity
            Add(qty_column = new SizeColumn(
-               new UIntMinMax<OrderSecurityAlgoMeta>(ort => ort.order.quantity(), nameof(OrderBookRowVM.quantity))));
+               new UIntMinMax<OrderSecurity>(ort => ort.order.quantity(), nameof(OrderBookRowVM.quantity))));
            // edit quantity column
            // not usually part of the main order book, but it's useful to add it
            // rather than debugging the popup window
            //Add(edit_qty_column = new EditableQtyColumn());
            // filled quantity
            Add(filled_qty_column = new FilledColumn(
-               new UIntMinMax<OrderSecurityAlgoMeta>(ort => ort.order.filled(), nameof(OrderBookRowVM.filled_quantity))));
+               new UIntMinMax<OrderSecurity>(ort => ort.order.filled(), nameof(OrderBookRowVM.filled_quantity))));
            // price
            Add(price_column = new SimpleTextColumn<DoubleMinMaxState>(
               Columns.Price,
               "Price",
               r => r.price_text,
               DefaultColumnWidths.Price,
-               new PriceMinMax<OrderSecurityAlgoMeta>(
+               new PriceMinMax<OrderSecurity>(
                  ort => ort.order.price(),
                  nameof(OrderBookRowVM.price)),
               DataGridFilterKnownTemplates.DoubleMinMax,
@@ -217,7 +243,7 @@ namespace mbts.spark {
               "Avg Price",
               r => r.avg_price_text,
               DefaultColumnWidths.Price,
-               new PriceMinMax<OrderSecurityAlgoMeta>(
+               new PriceMinMax<OrderSecurity>(
                  ort => ort.order.avg_price(),
                  nameof(OrderBookRowVM.avg_price)),
               DataGridFilterKnownTemplates.DoubleMinMax,
@@ -228,18 +254,21 @@ namespace mbts.spark {
               "Last Filled",
               r => r.last_price_text,
               DefaultColumnWidths.Price,
-               new PriceMinMax<OrderSecurityAlgoMeta>(
+               new PriceMinMax<OrderSecurity>(
                  ort => ort.order.last_price(),
                  nameof(OrderBookRowVM.last_price)),
               DataGridFilterKnownTemplates.DoubleMinMax,
               _wrap_comparer(r => r.last_price)));
+            // piq
+            Add(piq_column = new PiqColumn(
+               new UIntMinMax<OrderSecurity>(ort => ort.piq ?? uint.MaxValue, nameof(OrderBookRowVM.piq))));
            // status
            Add(status_column = new SimpleTextColumn<OrderStatus[]>(
               Columns.Status,
               "Status",
               r => r.status.ToString(),
               80,
-               DiscreteValuesFilterVM.Create<OrderSecurityAlgoMeta, OrderStatus>(
+               DiscreteValuesFilterVM.Create<OrderSecurity, OrderStatus>(
                  EnumHelper.get_values<OrderStatus>().ToList(),
                  ort => ort.order.status(),
                  nameof(OrderBookRowVM.status)),
@@ -247,7 +276,7 @@ namespace mbts.spark {
               _wrap_comparer(r => r.status)));
            // last message
            Add(last_message_column = new OrderBookLastMessageColumn(
-               new RegexFilterVM<OrderSecurityAlgoMeta>(
+               new RegexFilterVM<OrderSecurity>(
                  ort => ort.order.last_msg(),
                  nameof(OrderBookRowVM.last_msg))));
            // security key
@@ -256,7 +285,7 @@ namespace mbts.spark {
               DefaultColumnHeaders.SecurityKey,
               r => r.security_key.ToString(),
               DefaultColumnWidths.SecurityKey,
-               new RegexFilterVM<OrderSecurityAlgoMeta>(
+               new RegexFilterVM<OrderSecurity>(
                  ort => ort.order.security_key().ToString(),
                  nameof(OrderBookRowVM.security_key)),
               DataGridFilterKnownTemplates.Regex,
@@ -267,7 +296,7 @@ namespace mbts.spark {
               DefaultColumnHeaders.OrderKey,
               r => r.order_key.ToString(),
               DefaultColumnWidths.OrderKey,
-               new RegexFilterVM<OrderSecurityAlgoMeta>(
+               new RegexFilterVM<OrderSecurity>(
                  ort => ort.order.Key.ToString(),
                  nameof(OrderBookRowVM.order_key)),
               DataGridFilterKnownTemplates.Regex,
@@ -278,7 +307,7 @@ namespace mbts.spark {
               "Parent Key",
               r => r.parent_order_key.ToString(),
               DefaultColumnWidths.ParentKey,
-               new RegexFilterVM<OrderSecurityAlgoMeta>(
+               new RegexFilterVM<OrderSecurity>(
                  ort => ort.order.ParentKey.ToString(),
                  nameof(OrderBookRowVM.parent_order_key)),
               DataGridFilterKnownTemplates.Regex,
@@ -289,7 +318,7 @@ namespace mbts.spark {
               DefaultColumnHeaders.AttachedTargetOrderKey,
               r => r.order.attached_target_order_key().ToString(),
               DefaultColumnWidths.AttachedTargetOrderKey,
-               new RegexFilterVM<OrderSecurityAlgoMeta>(
+               new RegexFilterVM<OrderSecurity>(
                  ort => ort.order.attached_target_order_key().ToString(),
                  nameof(OrderBookRowVM.parent_order_key)),
               DataGridFilterKnownTemplates.Regex,
@@ -307,6 +336,7 @@ namespace mbts.spark {
         public SimpleTextColumn<Venue[]> exchange_column { get; }
         public SimpleTextColumn<TimeInForce[]> time_in_force_column { get; }
         public OrderBookOrderTypeColumn order_type_column { get; }
+         public OrderBookOrderTypeColumn root_algo_type_column { get; }
         public SimpleTextColumn<OrderSubType[]> sub_type_column { get; }
         public SideColumn side_column { get; }
         public SizeColumn qty_column { get; }
@@ -321,6 +351,7 @@ namespace mbts.spark {
         public SimpleTextColumn<string> order_key_column { get; }
         public SimpleTextColumn<string> parent_key_column { get; }
         public SimpleTextColumn<string> attached_target_order_key_column { get; }
+         public PiqColumn piq_column { get; }

         public FilterStates create_filter_states() =>
            new FilterStates {
@@ -333,6 +364,7 @@ namespace mbts.spark {
               exchanges = exchange_column.filter.get_state(),
               tifs = time_in_force_column.filter.get_state(),
               order_types = order_type_column.filter.get_state(),
+               root_algo_types = root_algo_type_column.filter.get_state(),
               order_sub_types = sub_type_column.filter.get_state(),
               sides = side_column.filter.get_state(),
               qty = qty_column.filter.get_state(),
@@ -344,7 +376,8 @@ namespace mbts.spark {
               exchange_message_regex = last_message_column.filter.get_state(),
               last_change = last_change_column.filter.get_state(),
               security_criteria = security_column.filter.get_state(),
-               symbols = symbol_column.filter.get_state()
+               symbols = symbol_column.filter.get_state(),
+               piq = piq_column.filter.get_state()
            };

         public (FilterStates filters, IReadOnlyList<SortingCriteria> sorting) create() =>
@@ -362,6 +395,7 @@ namespace mbts.spark {
               filled_qty_column.filter.load_state(fs.qty_filled);
               side_column.filter.load_state(fs.sides);
               order_type_column.filter.load_state(fs.order_types);
+               root_algo_type_column.filter.load_state(fs.root_algo_types);
               sub_type_column.filter.load_state(fs.order_sub_types);
               time_in_force_column.filter.load_state(fs.tifs);
               exchange_column.filter.load_state(fs.exchanges);
@@ -373,6 +407,7 @@ namespace mbts.spark {
               status_column.filter.load_state(fs.statuses);
               last_message_column.filter.load_state(fs.exchange_message_regex);
               last_change_column.filter.load_state(fs.last_change);
+               piq_column.filter.load_state(fs.piq);
            }
            _active_comparers.Clear();
            foreach (var col in this)
@@ -393,9 +428,9 @@ namespace mbts.spark {
            }
         }

-         public Func<OrderSecurityAlgoMeta, bool> get_filter() {
+         public Func<OrderSecurity, bool> get_filter() {
            var active_filters = this.OfType<ICVOrderBookColumn>().Where(c => c.filter.active.GetValueOrDefault()).Select(c => c.filter).ToArray();
-            return active_filters.Length == 0 ? null : new Func<OrderSecurityAlgoMeta, bool>(r => active_filters.All(f => f.filter(r)));
+            return active_filters.Length == 0 ? null : new Func<OrderSecurity, bool>(r => active_filters.All(f => f.filter(r)));
         }

         public OrderBookSortingData get_sorting_data() {
@@ -424,6 +459,7 @@ namespace mbts.spark {
         }

         public void Dispose() {
+            Disposable.dispose(ref _resources);
            foreach (var col in this.OfType<ICVOrderBookColumn>())
               (col.filter as IDisposable)?.Dispose();
            Clear();
@@ -495,7 +531,7 @@ namespace mbts.spark {
         GlyphContext _root_glyph_context, _child_glyph_context;

         protected OrderbookColumnBase(Columns col_key, string header, Func<OrderBookRowVM, string> get_text, double width,
-            IDataGridColumnPersistentFilter<OrderSecurityAlgoMeta, T> filter, string filter_template, IComparer<OrderBookRowVM> comparer) : base(col_key) {
+            IDataGridColumnPersistentFilter<OrderSecurity, T> filter, string filter_template, IComparer<OrderBookRowVM> comparer) : base(col_key) {
            id = key.ToString();
            Width = width;
            Header = header;
@@ -512,10 +548,10 @@ namespace mbts.spark {
            }
         }

-         public IDataGridColumnPersistentFilter<OrderSecurityAlgoMeta, T> filter { get; }
+         public IDataGridColumnPersistentFilter<OrderSecurity, T> filter { get; }
         public IComparer<OrderBookRowVM> comparer { get; }

-         IDataGridColumnFilter<OrderSecurityAlgoMeta> ICVOrderBookColumn.filter => filter;
+         IDataGridColumnFilter<OrderSecurity> ICVOrderBookColumn.filter => filter;
         IDataGridColumnFilter IFilterableColumn.filter => filter;
         string IFilterableColumn.filter_template => _filter_template;
         ListSortDirection? ICVOrderBookColumn.SortDirection { get => _cached_sort_direction; set => SortDirection = value; }
@@ -529,17 +565,17 @@ namespace mbts.spark {

      public class SimpleTextColumn<TFilterState> : OrderbookColumnBase<TFilterState>, IRenderColumn<OrderBookRowVM> {
         public SimpleTextColumn(Columns key, string header, Func<OrderBookRowVM, string> get_text, double width,
-            IDataGridColumnPersistentFilter<OrderSecurityAlgoMeta, TFilterState> filter, string filter_template, IComparer<OrderBookRowVM> comparer)
+            IDataGridColumnPersistentFilter<OrderSecurity, TFilterState> filter, string filter_template, IComparer<OrderBookRowVM> comparer)
            : base(key, header, get_text, width, filter, filter_template, comparer) { }

         public void draw(OrderBookRowVM row, DrawingContext dc, ColumnGeometry position, double row_height) =>
            CellRender.draw_text(dc, _get_glyph_context(row), font_size, _get_text(row), position, row_height,
-               font_brush, null, horizontal_alignment, VerticalAlignment.Center, DefaultCellPadding);
+               RenderUtils.get_foreground(row, font_brush), null, horizontal_alignment, VerticalAlignment.Center, DefaultCellPadding);
      }

      #region Explicit Column Defs
      public class SideColumn : OrderbookColumnBase<Side[]>, IRenderColumn<OrderBookRowVM> {
-         public SideColumn(IDataGridColumnPersistentFilter<OrderSecurityAlgoMeta, Side[]> filter)
+         public SideColumn(IDataGridColumnPersistentFilter<OrderSecurity, Side[]> filter)
            : base(Columns.Side, "B/S", r => r.side.ToString(), DefaultColumnWidths.Side, filter, DataGridFilterKnownTemplates.EnumValues, _wrap_comparer(r => r.side)) { }

         public void draw(OrderBookRowVM row, DrawingContext dc, ColumnGeometry position, double row_height) =>
@@ -548,7 +584,7 @@ namespace mbts.spark {
      }

      public class SizeColumn : OrderbookColumnBase<UIntMinMaxState>, IRenderColumn<OrderBookRowVM> {
-         public SizeColumn(IDataGridColumnPersistentFilter<OrderSecurityAlgoMeta, UIntMinMaxState> filter)
+         public SizeColumn(IDataGridColumnPersistentFilter<OrderSecurity, UIntMinMaxState> filter)
            : base(Columns.Size, "Qty", r => r.quantity.ToString(), DefaultColumnWidths.Size, filter, DataGridFilterKnownTemplates.UIntMinMax, _wrap_comparer(r => r.quantity)) { }

         public void draw(OrderBookRowVM row, DrawingContext dc, ColumnGeometry position, double row_height) =>
@@ -557,7 +593,7 @@ namespace mbts.spark {
      }

      public class FilledColumn : OrderbookColumnBase<UIntMinMaxState>, IRenderColumn<OrderBookRowVM> {
-         public FilledColumn(IDataGridColumnPersistentFilter<OrderSecurityAlgoMeta, UIntMinMaxState> filter)
+         public FilledColumn(IDataGridColumnPersistentFilter<OrderSecurity, UIntMinMaxState> filter)
            : base(Columns.Filled, "Filled Qty", r => r.filled_quantity.ToString(), DefaultColumnWidths.Size, filter, DataGridFilterKnownTemplates.UIntMinMax, _wrap_comparer(r => r.filled_quantity)) { }

         public void draw(OrderBookRowVM row, DrawingContext dc, ColumnGeometry position, double row_height) =>
@@ -566,21 +602,32 @@ namespace mbts.spark {
      }

      public class OrderBookOrderTypeColumn : OrderTypeColumn<Columns>, ICVOrderBookColumn {
+         readonly BindingBase _foreground_binding;
         ListSortDirection? _cached_sort_direction;
-         public OrderBookOrderTypeColumn(IDataGridColumnPersistentFilter<OrderSecurityAlgoMeta, OrderType[]> filter)
-            : base(Columns.OrderType, new Binding(nameof(OrderBookRowVM.badge_fill)), new Binding(nameof(OrderBookRowVM.display_name)), filter) {
+
+         public OrderBookOrderTypeColumn(Columns key, string badge_fill_binding_path, string display_name_binding_path, IComparer<OrderBookRowVM> row_comparer, IDataGridColumnPersistentFilter<OrderSecurity, AlgoID[]> filter, string header = DefaultColumnHeaders.OrderType)
+            : base(key, new Binding(badge_fill_binding_path), new Binding(display_name_binding_path), filter, header) {
            id = key.ToString();
            this.filter = filter;
            font_weight_binding = RenderUtils.get_font_weight_binding();
+            _foreground_binding = RenderUtils.get_foreground_binding(this);
            _cached_sort_direction = SortDirection;
+            this.comparer = row_comparer;
         }

-         public new IDataGridColumnPersistentFilter<OrderSecurityAlgoMeta, OrderType[]> filter { get; }
-         public IComparer<OrderBookRowVM> comparer => _wrap_comparer(r => r.order_type);
+         public new IDataGridColumnPersistentFilter<OrderSecurity, AlgoID[]> filter { get; }
+         public override string filter_template => DataGridFilterKnownTemplates.AlgoType;
+         public IComparer<OrderBookRowVM> comparer { get; }

-         IDataGridColumnFilter<OrderSecurityAlgoMeta> ICVOrderBookColumn.filter => filter;
+         IDataGridColumnFilter<OrderSecurity> ICVOrderBookColumn.filter => filter;
         ListSortDirection? ICVOrderBookColumn.SortDirection { get => _cached_sort_direction; set => SortDirection = value; }

+         public override FrameworkElement view_factory() {
+            var view = base.view_factory();
+            view.SetBinding(OrderTypeItem.ForegroundProperty, _foreground_binding);
+            return view;
+         }
+
         protected override void OnSortDirectionChanged(ListSortDirection? new_value) {
            _cached_sort_direction = new_value;
            base.OnSortDirectionChanged(new_value);
@@ -590,7 +637,7 @@ namespace mbts.spark {
      public class OrderBookLastMessageColumn : TextColumn<Columns>, ICVOrderBookColumn {
         ListSortDirection? _cached_sort_direction;

-         public OrderBookLastMessageColumn(IDataGridColumnPersistentFilter<OrderSecurityAlgoMeta, string> filter)
+         public OrderBookLastMessageColumn(IDataGridColumnPersistentFilter<OrderSecurity, string> filter)
            : base(Columns.LastMessage, new Binding(nameof(OrderBookRowVM.last_msg)), filter, DataGridFilterKnownTemplates.Regex) {
            id = key.ToString();
            this.filter = filter;
@@ -599,10 +646,10 @@ namespace mbts.spark {
            tooltip_binding = new Binding(nameof(OrderBookRowVM.last_msg));
         }

-         public new IDataGridColumnPersistentFilter<OrderSecurityAlgoMeta, string> filter { get; }
+         public new IDataGridColumnPersistentFilter<OrderSecurity, string> filter { get; }
         public IComparer<OrderBookRowVM> comparer => _wrap_comparer(r => r.last_msg);

-         IDataGridColumnFilter<OrderSecurityAlgoMeta> ICVOrderBookColumn.filter => filter;
+         IDataGridColumnFilter<OrderSecurity> ICVOrderBookColumn.filter => filter;
         ListSortDirection? ICVOrderBookColumn.SortDirection { get => _cached_sort_direction; set => SortDirection = value; }

         protected override void OnSortDirectionChanged(ListSortDirection? new_value) {
@@ -611,25 +658,35 @@ namespace mbts.spark {
         }
      }

+      public class PiqColumn : OrderbookColumnBase<UIntMinMaxState>, IRenderColumn<OrderBookRowVM> {
+         public PiqColumn(IDataGridColumnPersistentFilter<OrderSecurity, UIntMinMaxState> filter)
+            : base(Columns.Piq, "PIQ", r => r.piq_text, DefaultColumnWidths.Size, filter, DataGridFilterKnownTemplates.UIntMinMax, _wrap_comparer(r => r.piq)) { }
+
+         public void draw(OrderBookRowVM row, DrawingContext dc, ColumnGeometry position, double row_height) =>
+            CellRender.draw_text(dc, _get_glyph_context(row), font_size, row.piq_text, position, row_height,
+               RenderUtils.get_foreground(row, font_brush), null, HorizontalAlignment.Right, VerticalAlignment.Center, DefaultCellPadding);
+      }
+
      public class SecurityColumn : FrameworkElementColumnBase<Columns>, ICVOrderBookColumn, IFilterableColumn {
-         readonly BindingBase _font_weight_binding = RenderUtils.get_font_weight_binding();
+         readonly BindingBase _font_weight_binding = RenderUtils.get_font_weight_binding(), _foreground_binding;
         readonly IValueConverter _expander_visiblilty_converter = new ui.converters.BooleanToVisibilityConverter { VisibilityForFalse = Visibility.Hidden };
         readonly IValueConverter _margin_converter = new AnonymousValueConverter<int, Thickness>(level => new Thickness(10 * level, 0, 0, 0));

         ListSortDirection? _cached_sort_direction;

-         public SecurityColumn(IDataGridColumnPersistentFilter<OrderSecurityAlgoMeta, SecurityCriteria> filter) : base(Columns.Security) {
+         public SecurityColumn(IDataGridColumnPersistentFilter<OrderSecurity, SecurityCriteria> filter) : base(Columns.Security) {
            id = key.ToString();
            this.filter = filter;
+            _foreground_binding = RenderUtils.get_foreground_binding(this);
            Header = DefaultColumnHeaders.Security;
            Width = DefaultColumnWidths.Security;
            _cached_sort_direction = SortDirection;
         }

-         public IDataGridColumnPersistentFilter<OrderSecurityAlgoMeta, SecurityCriteria> filter { get; }
+         public IDataGridColumnPersistentFilter<OrderSecurity, SecurityCriteria> filter { get; }
         public IComparer<OrderBookRowVM> comparer => _wrap_comparer(r => r.security, SecurityHelper.Comparer.InstanceImmutable.to_nullable());

-         IDataGridColumnFilter<OrderSecurityAlgoMeta> ICVOrderBookColumn.filter => filter;
+         IDataGridColumnFilter<OrderSecurity> ICVOrderBookColumn.filter => filter;
         IDataGridColumnFilter IFilterableColumn.filter => filter;
         string IFilterableColumn.filter_template => DataGridFilterKnownTemplates.DiscreteValues;
         ListSortDirection? ICVOrderBookColumn.SortDirection { get => _cached_sort_direction; set => SortDirection = value; }
@@ -647,7 +704,7 @@ namespace mbts.spark {
            security_view.SetBinding(TextBlock.FontSizeProperty, new Binding(nameof(font_size)) { Source = this });
            security_view.SetBinding(TextBlock.TextProperty, nameof(OrderBookRowVM.security_text));
            security_view.SetBinding(TextBlock.HorizontalAlignmentProperty, new Binding(nameof(horizontal_alignment)) { Source = this });
-            security_view.SetBinding(TextBlock.ForegroundProperty, new Binding(nameof(font_brush)) { Source = this });
+            security_view.SetBinding(TextBlock.ForegroundProperty, _foreground_binding);
            security_view.SetBinding(TextBlock.FontFamilyProperty, new Binding(nameof(font_family)) { Source = this });
            security_view.SetBinding(TextBlock.FontWeightProperty, _font_weight_binding);
            //
@@ -667,6 +724,33 @@ namespace mbts.spark {
         }
      }

+      public class CheckColumn : FrameworkElementColumnBase<Columns> {
+         readonly BindingBase _checked_binding;
+         public CheckColumn(string checked_property) : base(Columns.Check) {
+            id = key.ToString();
+            Width = 30;
+            _checked_binding = new Binding(checked_property);
+
+            var header_cb = new CheckBox();
+            header_cb.ToolTip = "Select / Unselect All";
+            header_cb.SetBinding(CheckBox.IsCheckedProperty, new Binding(nameof(OrderBookVM.all_rows_selected)));
+            this.Header = header_cb;
+         }
+
+         public override FrameworkElement view_factory() {
+            var grid = new Grid() {
+               HorizontalAlignment = HorizontalAlignment.Center,
+               VerticalAlignment = VerticalAlignment.Center,
+            };
+            var cb = new CheckBox();
+            cb.Name = "check_col";
+            cb.SetBinding(CheckBox.IsCheckedProperty, _checked_binding);
+
+            grid.Children.Add(cb);
+            return grid;
+         }
+      }
+
      public class CancelColumn : FrameworkElementColumnBase<Columns> {
         readonly BindingBase _command_binding;

@@ -742,7 +826,7 @@ namespace mbts.spark {
            // create the attach button and assign the menu to it
            var attach_button = new Button() {
               Name = "attach_button",
-               Content = "A",
+               Content = new Image() { Source = Icons.AttachAlgos },
               HorizontalAlignment = HorizontalAlignment.Stretch,
               VerticalAlignment = VerticalAlignment.Stretch,
               Focusable = false,
@@ -755,7 +839,10 @@ namespace mbts.spark {
               VerticalAlignment = VerticalAlignment.Center,
            };
            attach_grid.Children.Add(attach_button);
-            attach_button.Click += (s, e) => { popup.IsOpen = !popup.IsOpen; };
+            attach_button.Click += (s, e) => {
+               popup.Child = create_popup_child();
+               popup.IsOpen = !popup.IsOpen;
+            };

            var orderbook_vm_datacontext_binding = new Binding("DataContext");
            orderbook_vm_datacontext_binding.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, _mini_or_full_ob_type, 1);
@@ -772,84 +859,9 @@ namespace mbts.spark {

            var row_vm_attach_command_binding = new Binding(WPFHelper.join_binding_paths("DataContext", nameof(OrderBookRowVM.attach_command)));
            row_vm_attach_command_binding.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(MiniOrderBookRowView), 1);
-            attach_button.SetBinding(Button.CommandProperty, row_vm_attach_command_binding); 
+            attach_button.SetBinding(Button.CommandProperty, row_vm_attach_command_binding);       

-            #region OrderParamsPanel
-            // finally, set the order_params DataContext to that of the ContextMenu
-            var order_params = AlgoEditorGridView.create_attach_view();
-            var order_params_binding = new Binding(WPFHelper.join_binding_paths("DataContext", nameof(OrderBookVM.attach_vm)));
-            order_params_binding.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(Popup), 1);          
-            order_params.SetBinding(FrameworkElement.DataContextProperty, order_params_binding);
-            order_params.SetBinding(AlgoEditorGridView.AlgoRootsProperty, new Binding(WPFHelper.join_binding_paths(nameof(OrderParamsVM.algo_vm), nameof(AlgoDefinitionVM.algo_roots))));
-            order_params.SetBinding(AlgoEditorGridView.SelectedAlgoRootProperty, new Binding(WPFHelper.join_binding_paths(nameof(OrderParamsVM.algo_vm), nameof(AlgoDefinitionVM.algo_root))));
-            order_params.SetBinding(AlgoEditorGridView.AlgoParamRowsProperty, new Binding(nameof(OrderParamsVM.param_rows)));
-            #endregion
-
-            #region Dialog Skirt
-            var dialog_skirt_button_style = 
-               Application.Current.TryFindResource(DialogSkirt.DialogSkirtButtonStyleKey) as Style ??
-               Application.Current.TryFindResource("CommonButton") as Style ??
-               Application.Current.TryFindResource(typeof(Button)) as Style;
-
-            // go find the OBVM on the ContextMenu to get the command
-            // The button for which this will server as a Binding to needs to both perform the send_attached_orders
-            // command *AND* close the algo param popup. Previously this was accomplished by setting both the Command
-            // and Click event on a Button appropriately, but since the Button that will perform this
-            // ultimately lives inside of the DialogSkirt, we don't have direct access to it.  Ergo,
-            // we make use of this addition trick from John that allows for both of these things to happen.
-            // We take our original ICommand (send_attached) and wrap it in another Command by way of a Converter on the binding,
-            // pure genious!
-            var send_attach_button_binding = new Binding(WPFHelper.join_binding_paths("DataContext", nameof(OrderBookVM.send_attached_orders_cmd))) {
-               Converter = CommandWithActionWrapper.mk_wrap_converter(() => popup.IsOpen = false)
-            };
-            send_attach_button_binding.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(Popup), 1);
-
-            // Our ultimate goal is to have the Ok button (DialogSkirtItem) run the send attached orders command.
-            // Since we're only dealing with binding paths in here and not actual objects, we don't have access
-            // to an actual Command, which is what the DialogSkirtItem expects.  John came up with a sneaky
-            // way of setting the Button.CommandProperty via a Style backdoor, but it's also necessary to
-            // create a KeyedStyleSelector here I guess.
-            // Also, the DialogSkirt Ok button seems to magically close the popup, cool!
-            var send_attached_button_style = new Style(typeof(Button), dialog_skirt_button_style);
-            send_attached_button_style.Setters.Add(new Setter(Button.CommandProperty, send_attach_button_binding));
-            var awesome_command_style_key = "SendAttachButtonStyleKey";
-            var cancel_style_key = "CancelButtonStyleKey";
-
-            var dialog_skirt = new DialogSkirt {
-               RightItems = new[] {
-               new DialogSkirtItem("OK", null, awesome_command_style_key) { is_default = true },
-               new DialogSkirtItem("Cancel", new DelegateCommand(() => popup.IsOpen = false), cancel_style_key) { is_cancel = true }
-            }};
-
-            var kss = new KeyedStyleSelector();
-            kss.Map.Add(new StyleSelectorKeyValue {
-               Key = awesome_command_style_key,
-               Value = send_attached_button_style
-            });
-            kss.Map.Add(
-               new StyleSelectorKeyValue {
-                  Key = cancel_style_key,
-                  Value = new Style(typeof(Button), dialog_skirt_button_style)
-               });
-            dialog_skirt.RightItemContainerStyleSelector = kss;
-
-            Grid.SetRow(dialog_skirt, 1);
-            var grid = new Grid();
-            grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Star) });
-            grid.RowDefinitions.Add(new RowDefinition { Height = GridLength.Auto });
-            grid.Children.Add(order_params);
-            grid.Children.Add(dialog_skirt);
-
-            var border = new Border() {
-               Background = BTSColors.common_background_brush,
-               BorderThickness = new Thickness(1),
-               Name = "attach_border",
-               Child = grid,
-            };
-
-            #endregion
-
-            popup.Child = border;
+            // set to true for debugging
            popup.StaysOpen = false;
            popup.PlacementTarget = attach_button;
            popup.Placement = PlacementMode.Bottom;
@@ -857,14 +869,13 @@ namespace mbts.spark {
            popup.SetBinding(Popup.DataContextProperty, new Binding("PlacementTarget.DataContext") {
               RelativeSource = new RelativeSource(RelativeSourceMode.Self)
            });
-
            #endregion

            #region Detach Button

            var detach_button = new Button() {
               Name = "detach_button",
-               Content = "D",
+               Content = new Image() { Source = Icons.DetachAlgos },
               HorizontalAlignment = HorizontalAlignment.Stretch,
               VerticalAlignment = VerticalAlignment.Stretch,
               Focusable = false, 
@@ -893,6 +904,83 @@ namespace mbts.spark {
            the_whole_thing.Children.Add(popup);

            return the_whole_thing;
+
+            UIElement create_popup_child() {
+               #region OrderParamsPanel
+               // finally, set the order_params DataContext to that of the ContextMenu
+               var order_params = AlgoEditorGridView.create_attach_view();
+               var order_params_binding = new Binding(WPFHelper.join_binding_paths("DataContext", nameof(OrderBookVM.attach_vm)));
+               order_params_binding.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(Popup), 1);
+               order_params.SetBinding(FrameworkElement.DataContextProperty, order_params_binding);
+               order_params.SetBinding(AlgoEditorGridView.AlgoRootsProperty, new Binding(WPFHelper.join_binding_paths(nameof(OrderParamsVM.algo_vm), nameof(AlgoDefinitionVM.algo_roots))));
+               order_params.SetBinding(AlgoEditorGridView.SelectedAlgoRootProperty, new Binding(WPFHelper.join_binding_paths(nameof(OrderParamsVM.algo_vm), nameof(AlgoDefinitionVM.algo_root))));
+               order_params.SetBinding(AlgoEditorGridView.AlgoParamRowsProperty, new Binding(nameof(OrderParamsVM.param_rows)));
+               #endregion
+
+               var dialog_skirt_button_style =
+                  Application.Current.TryFindResource(DialogSkirt.DialogSkirtButtonStyleKey) as Style ??
+                  Application.Current.TryFindResource("CommonButton") as Style ??
+                  Application.Current.TryFindResource(typeof(Button)) as Style;
+
+               // go find the OBVM on the ContextMenu to get the command
+               // The button for which this will server as a Binding to needs to both perform the send_attached_orders
+               // command *AND* close the algo param popup. Previously this was accomplished by setting both the Command
+               // and Click event on a Button appropriately, but since the Button that will perform this
+               // ultimately lives inside of the DialogSkirt, we don't have direct access to it.  Ergo,
+               // we make use of this addition trick from John that allows for both of these things to happen.
+               // We take our original ICommand (send_attached) and wrap it in another Command by way of a Converter on the binding,
+               // pure genious!
+               var send_attach_button_binding = new Binding(WPFHelper.join_binding_paths("DataContext", nameof(OrderBookVM.send_attached_orders_cmd))) {
+                  // set to true for debugging
+                  Converter = CommandWithActionWrapper.mk_wrap_converter(() => popup.IsOpen = false)
+               };
+               send_attach_button_binding.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(Popup), 1);
+
+               // Our ultimate goal is to have the Ok button (DialogSkirtItem) run the send attached orders command.
+               // Since we're only dealing with binding paths in here and not actual objects, we don't have access
+               // to an actual Command, which is what the DialogSkirtItem expects.  John came up with a sneaky
+               // way of setting the Button.CommandProperty via a Style backdoor, but it's also necessary to
+               // create a KeyedStyleSelector here I guess.
+               // Also, the DialogSkirt Ok button seems to magically close the popup, cool!
+               var send_attached_button_style = new Style(typeof(Button), dialog_skirt_button_style);
+               send_attached_button_style.Setters.Add(new Setter(Button.CommandProperty, send_attach_button_binding));
+               var awesome_command_style_key = "SendAttachButtonStyleKey";
+               var cancel_style_key = "CancelButtonStyleKey";
+
+               var dialog_skirt = new DialogSkirt {
+                  RightItems = new[] {
+               new DialogSkirtItem("OK", null, awesome_command_style_key) { is_default = true },
+               new DialogSkirtItem("Cancel", new DelegateCommand(() => popup.IsOpen = false), cancel_style_key) { is_cancel = true }
+            }
+               };
+
+               var kss = new KeyedStyleSelector();
+               kss.Map.Add(new StyleSelectorKeyValue {
+                  Key = awesome_command_style_key,
+                  Value = send_attached_button_style
+               });
+               kss.Map.Add(
+                  new StyleSelectorKeyValue {
+                     Key = cancel_style_key,
+                     Value = new Style(typeof(Button), dialog_skirt_button_style)
+                  });
+               dialog_skirt.RightItemContainerStyleSelector = kss;
+
+               Grid.SetRow(dialog_skirt, 1);
+               var grid = new Grid();
+               grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Star) });
+               grid.RowDefinitions.Add(new RowDefinition { Height = GridLength.Auto });
+               grid.Children.Add(order_params);
+               grid.Children.Add(dialog_skirt);
+
+               var border = new Border() {
+                  Background = BTSColors.common_background_brush,
+                  BorderThickness = new Thickness(1),
+                  Name = "attach_border",
+                  Child = grid,
+               };
+               return border;
+            }
         }
      }

@@ -913,17 +1001,21 @@ namespace mbts.spark {
         public override FrameworkElement view_factory() {
            var popup = new System.Windows.Controls.Primitives.Popup();

-            #region Attach Button
+            #region Update Button

-            // create the attach button and assign the menu to it
+            // create the update button and assign the menu to it
            var update_button = new Button() {
               Name = "update_button",
               Content = "···",
               Margin = new Thickness(2),
               VerticalAlignment = VerticalAlignment.Center,
-               Focusable = false
+               Focusable = false,
+               ToolTip = "Update"
+            };
+            update_button.Click += (s, e) => {
+               popup.Child = create_popup_child();
+               popup.IsOpen = !popup.IsOpen;
            };
-            update_button.Click += (s, e) => { popup.IsOpen = !popup.IsOpen; };

            var orderbook_vm_datacontext_binding = new Binding("DataContext");
            orderbook_vm_datacontext_binding.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, _mini_or_full_ob_type, 1);
@@ -938,89 +1030,14 @@ namespace mbts.spark {
            row_vm_update_command_binding.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(MiniOrderBookRowView), 1);
            update_button.SetBinding(Button.CommandProperty, row_vm_update_command_binding);

+            // update button is only visible for orders under the control of an algo
+            var update_button_visibility_binding = new Binding(WPFHelper.join_binding_paths("DataContext", nameof(OrderBookRowVM.root_algo_order_type))) {
+               Converter = ValueConverter.create<CustomOrderDefinition.CustomOneofCase, Visibility>(ord_type => utilities.OrderDataHelper.outright_order_types.Contains(ord_type) ? Visibility.Hidden : Visibility.Visible)
+            }; 
+            update_button_visibility_binding.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(MiniOrderBookRowView), 1);
+            update_button.SetBinding(Button.VisibilityProperty, update_button_visibility_binding);
            #endregion 

-            #region OrderParamsPanel
-            // finally, set the order_params DataContext to that of the ContextMenu
-            var order_params = new AlgoEditorGridView {
-               Margin = new Thickness(6),
-               CanUserChangeAlgoRoot = false,
-            };
-            ;
-            var order_params_binding = new Binding(WPFHelper.join_binding_paths("DataContext", nameof(OrderBookVM.order_mod_vm)));
-            order_params_binding.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(Popup), 1);
-            order_params.SetBinding(FrameworkElement.DataContextProperty, order_params_binding);
-            order_params.SetBinding(AlgoEditorGridView.AlgoRootsProperty, new Binding(WPFHelper.join_binding_paths(nameof(OrderParamsVM.algo_vm), nameof(AlgoDefinitionVM.algo_roots))));
-            order_params.SetBinding(AlgoEditorGridView.SelectedAlgoRootProperty, new Binding(WPFHelper.join_binding_paths(nameof(OrderParamsVM.algo_vm), nameof(AlgoDefinitionVM.algo_root))));
-            order_params.SetBinding(AlgoEditorGridView.AlgoParamRowsProperty, new Binding(nameof(OrderParamsVM.param_rows)));
-            #endregion
-
-            #region Dialog Skirt
-            var dialog_skirt_button_style =
-               Application.Current.TryFindResource(DialogSkirt.DialogSkirtButtonStyleKey) as Style ??
-               Application.Current.TryFindResource("CommonButton") as Style ??
-               Application.Current.TryFindResource(typeof(Button)) as Style;
-
-            // go find the OBVM on the ContextMenu to get the command
-            // The button for which this will server as a Binding to needs to both perform the send_attached_orders
-            // command *AND* close the algo param popup. Previously this was accomplished by setting both the Command
-            // and Click event on a Button appropriately, but since the Button that will perform this
-            // ultimately lives inside of the DialogSkirt, we don't have direct access to it.  Ergo,
-            // we make use of this addition trick from John that allows for both of these things to happen.
-            // We take our original ICommand (send_attached) and wrap it in another Command by way of a Converter on the binding,
-            // pure genious!
-            var modify_selected_button_binding = new Binding(WPFHelper.join_binding_paths("DataContext", nameof(OrderBookVM.modify_selected_orders_cmd))) {
-               Converter = CommandWithActionWrapper.mk_wrap_converter(() => popup.IsOpen = false)
-            };
-            modify_selected_button_binding.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(Popup), 1);
-
-            // Our ultimate goal is to have the Ok button (DialogSkirtItem) run the send attached orders command.
-            // Since we're only dealing with binding paths in here and not actual objects, we don't have access
-            // to an actual Command, which is what the DialogSkirtItem expects.  John came up with a sneaky
-            // way of setting the Button.CommandProperty via a Style backdoor, but it's also necessary to
-            // create a KeyedStyleSelector here I guess.
-            // Also, the DialogSkirt Ok button seems to magically close the popup, cool!
-            var send_attached_button_style = new Style(typeof(Button), dialog_skirt_button_style);
-            send_attached_button_style.Setters.Add(new Setter(Button.CommandProperty, modify_selected_button_binding));
-            var awesome_command_style_key = "SendAttachButtonStyleKey";
-            var cancel_style_key = "CancelButtonStyleKey";
-
-            var dialog_skirt = new DialogSkirt {
-               RightItems = new[] {
-               new DialogSkirtItem("OK", null, awesome_command_style_key) { is_default = true },
-               new DialogSkirtItem("Cancel", new DelegateCommand(() => popup.IsOpen = false), cancel_style_key) { is_cancel = true }
-            }
-            };
-
-            var kss = new KeyedStyleSelector();
-            kss.Map.Add(new StyleSelectorKeyValue {
-               Key = awesome_command_style_key,
-               Value = send_attached_button_style
-            });
-            kss.Map.Add(
-               new StyleSelectorKeyValue {
-                  Key = cancel_style_key,
-                  Value = new Style(typeof(Button), dialog_skirt_button_style)
-               });
-            dialog_skirt.RightItemContainerStyleSelector = kss;
-
-            Grid.SetRow(dialog_skirt, 1);
-            var grid = new Grid();
-            grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Star) });
-            grid.RowDefinitions.Add(new RowDefinition { Height = GridLength.Auto });
-            grid.Children.Add(order_params);
-            grid.Children.Add(dialog_skirt);
-
-            var border = new Border() {
-               Background = BTSColors.common_background_brush,
-               BorderThickness = new Thickness(1),
-               Name = "update_border",
-               Child = grid,
-            };
-
-            #endregion
-
-            popup.Child = border;
            popup.StaysOpen = false;
            popup.PlacementTarget = update_button;
            popup.Placement = PlacementMode.Bottom;
@@ -1028,12 +1045,94 @@ namespace mbts.spark {
            popup.SetBinding(Popup.DataContextProperty, new Binding("PlacementTarget.DataContext") {
               RelativeSource = new RelativeSource(RelativeSourceMode.Self)
            });
+            popup.Closed += (s, e) => {
+               if (popup.try_find_ancestor_of_type(out MiniOrderBookView mini_ob) && mini_ob.DataContext is OrderBookVM ob_vm) {
+                  ob_vm.is_attaching_orders = false;
+               }
+            };

            var the_whole_thing = new Grid();
            the_whole_thing.Children.Add(update_button);
            the_whole_thing.Children.Add(popup);

            return the_whole_thing;
+
+            UIElement create_popup_child() {
+               var order_params = new AlgoEditorGridView {
+                  Margin = new Thickness(6),
+                  CanUserChangeAlgoRoot = false,
+               };
+               var order_params_binding = new Binding(WPFHelper.join_binding_paths("DataContext", nameof(OrderBookVM.order_mod_vm)));
+               order_params_binding.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(Popup), 1);
+               order_params.SetBinding(FrameworkElement.DataContextProperty, order_params_binding);
+               order_params.SetBinding(AlgoEditorGridView.AlgoRootsProperty, new Binding(WPFHelper.join_binding_paths(nameof(OrderParamsVM.algo_vm), nameof(AlgoDefinitionVM.algo_roots))));
+               order_params.SetBinding(AlgoEditorGridView.SelectedAlgoRootProperty, new Binding(WPFHelper.join_binding_paths(nameof(OrderParamsVM.algo_vm), nameof(AlgoDefinitionVM.algo_root))));
+               order_params.SetBinding(AlgoEditorGridView.AlgoParamRowsProperty, new Binding(nameof(OrderParamsVM.param_rows)));
+
+               var dialog_skirt_button_style =
+                  Application.Current.TryFindResource(DialogSkirt.DialogSkirtButtonStyleKey) as Style ??
+                  Application.Current.TryFindResource("CommonButton") as Style ??
+                  Application.Current.TryFindResource(typeof(Button)) as Style;
+
+               // go find the OBVM on the ContextMenu to get the command
+               // The button for which this will server as a Binding to needs to both perform the send_attached_orders
+               // command *AND* close the algo param popup. Previously this was accomplished by setting both the Command
+               // and Click event on a Button appropriately, but since the Button that will perform this
+               // ultimately lives inside of the DialogSkirt, we don't have direct access to it.  Ergo,
+               // we make use of this addition trick from John that allows for both of these things to happen.
+               // We take our original ICommand (send_attached) and wrap it in another Command by way of a Converter on the binding,
+               // pure genious!
+               var modify_selected_button_binding = new Binding(WPFHelper.join_binding_paths("DataContext", nameof(OrderBookVM.modify_selected_orders_cmd))) {
+                  // set to true for debugging
+                  Converter = CommandWithActionWrapper.mk_wrap_converter(() => popup.IsOpen = false)
+               };
+               modify_selected_button_binding.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(Popup), 1);
+
+               // Our ultimate goal is to have the Ok button (DialogSkirtItem) run the send attached orders command.
+               // Since we're only dealing with binding paths in here and not actual objects, we don't have access
+               // to an actual Command, which is what the DialogSkirtItem expects.  John came up with a sneaky
+               // way of setting the Button.CommandProperty via a Style backdoor, but it's also necessary to
+               // create a KeyedStyleSelector here I guess.
+               // Also, the DialogSkirt Ok button seems to magically close the popup, cool!
+               var send_attached_button_style = new Style(typeof(Button), dialog_skirt_button_style);
+               send_attached_button_style.Setters.Add(new Setter(Button.CommandProperty, modify_selected_button_binding));
+               var awesome_command_style_key = "SendAttachButtonStyleKey";
+               var cancel_style_key = "CancelButtonStyleKey";
+
+               var dialog_skirt = new DialogSkirt {
+                  RightItems = new[] {
+               new DialogSkirtItem("OK", null, awesome_command_style_key) { is_default = true },
+               new DialogSkirtItem("Cancel", new DelegateCommand(() => popup.IsOpen = false), cancel_style_key) { is_cancel = true }
+            }
+               };
+
+               var kss = new KeyedStyleSelector();
+               kss.Map.Add(new StyleSelectorKeyValue {
+                  Key = awesome_command_style_key,
+                  Value = send_attached_button_style
+               });
+               kss.Map.Add(
+                  new StyleSelectorKeyValue {
+                     Key = cancel_style_key,
+                     Value = new Style(typeof(Button), dialog_skirt_button_style)
+                  });
+               dialog_skirt.RightItemContainerStyleSelector = kss;
+
+               Grid.SetRow(dialog_skirt, 1);
+               var grid = new Grid();
+               grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Star) });
+               grid.RowDefinitions.Add(new RowDefinition { Height = GridLength.Auto });
+               grid.Children.Add(order_params);
+               grid.Children.Add(dialog_skirt);
+
+               var border = new Border() {
+                  Background = BTSColors.common_background_brush,
+                  BorderThickness = new Thickness(1),
+                  Name = "update_border",
+                  Child = grid,
+               };
+               return border;
+            }
         }
      }

@@ -1078,7 +1177,6 @@ namespace mbts.spark {
      public class CommitColumn : FrameworkElementColumnBase<Columns> {
         public CommitColumn() : base(Columns.Commit) {
            id = key.ToString();
-            Header = "";
            Width = 20;
         }

@@ -1115,19 +1213,24 @@ namespace mbts.spark {
      static class RenderUtils {
         public static FontWeight
            root_font_weight = FontWeights.Normal,
-            child_font_weight = FontWeights.Light;
+            child_font_weight = FontWeights.Normal;
+         static readonly IMultiValueConverter _foreground_converter =
+            ValueConverter.create<bool, Brush, Brush>(_get_foreground);

         public static double font_size = FontSizes.Small;

         public static readonly IValueConverter
            _sub_type_text_converter = new ui.spark.converters.OrderSubTypeDisplayTextConverter(),
            _side_brush_converter = new AnonymousValueConverter<Side, Brush>(s => s == Side.Buy ? BTSColors.MarketData.bid : BTSColors.MarketData.ask),
-            _font_weight_converter = new AnonymousValueConverter<bool, FontWeight>(is_child => is_child ? FontWeights.Light : FontWeights.Normal);
+            _font_weight_converter = new AnonymousValueConverter<bool, FontWeight>(is_child => is_child ? child_font_weight : root_font_weight);
+
         public static readonly IMultiValueConverter
            _price_text_converter = new ui.spark.converters.TickDisplayConverter(),
            _background_converter = new AnonymousMultiValueConverter<bool, OrderStatus, Brush>(
               (selected, status) => selected || status != OrderStatus.Working ? Brushes.Transparent : BTSColors.Orders.working_order_background_brush);

+         static readonly bool _animate_child_order_rows = mbts.config.Configuration.get<bts.config.OrderBookOptions>().animate_child_order_rows;
+
         public static BindingBase _get_background_binding() {
            var mb = new MultiBinding { Converter = _background_converter };
            mb.Bindings.Add(new Binding(nameof(ListBoxItem.IsSelected)) { RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(ListBoxItem), 1) });
@@ -1135,9 +1238,29 @@ namespace mbts.spark {
            return mb;
         }

-         public static Brush get_side_brush(OrderBookRowVM r) => r.side == Side.Buy ? BTSColors.MarketData.bid : BTSColors.MarketData.ask;
-         public static BindingBase get_font_weight_binding() => new Binding(nameof(OrderBookRowVM.is_child)) { Converter = _font_weight_converter };
-      }
+         public static BindingBase get_foreground_binding(ColumnBase col) {
+            var col_font_brush_binding = new Binding(nameof(ColumnBase.font_brush)) { Source = col };
+            if (!_animate_child_order_rows)
+               return col_font_brush_binding;
+            var mb = new MultiBinding { Converter = _foreground_converter };
+            mb.Bindings.Add(new Binding(nameof(OrderBookRowVM.is_child)));
+            mb.Bindings.Add(col_font_brush_binding);
+            return mb;
+         }

+         public static Brush get_side_brush(OrderBookRowVM r) => get_foreground(r, r.side == Side.Buy ? BTSColors.MarketData.bid : BTSColors.MarketData.ask);
+         public static BindingBase get_font_weight_binding() => new Binding(nameof(OrderBookRowVM.is_child)) { Converter = _font_weight_converter };
+
+         public static Brush get_foreground(OrderBookRowVM row, Brush brush) =>
+            _animate_child_order_rows ? _get_foreground(row.is_child, brush) : brush;
+
+         static Brush _get_foreground(bool is_child, Brush brush) {
+            if (is_child) {
+               brush = brush.Clone();
+               brush.Opacity = 0.75;
+            }
+            return brush;
+         }
+      }
   }
 }
@@ -14,34 +14,29 @@ using System.Windows.Media;
 using Columns = mbts.spark.OrderBookGridView.ColumnKeys;

 namespace mbts.spark {
-   partial class OrderBookRowVM : IEquatable<OrderBookRowVM>, DIYGrid.IRowVM, IHierarchicalRow<OrderSecurityAlgoMeta>, INotifyPropertyChanged {
+   partial class OrderBookRowVM : IEquatable<OrderBookRowVM>, DIYGrid.IRowVM, IHierarchicalRow<OrderSecurity>, INotifyPropertyChanged {
      const string _unknown_security_price_format_string = "0.#########";
      const int _unknown_security_price_num_fractional_digits = 9;
      readonly OrderBookVM _owner;
-      Brush _badge_fill;
+      Color? _root_algo_badge_color_backing;
+      Brush _badge_fill, _root_algo_badge_fill;
      IRaiseCanExecuteChangedCommand _show_order_modify_cmd, _toggle_expanded_cmd, _cancel_cmd, _detach_command, _attach_command, _update_command, _modify_order_quantity_andor_price, _revert_prospective_order_quantity_andor_price;
      bool _is_parent, _is_expanded, _is_selected, _is_attachable, _is_detachable;
      int _depth_level;
      SecurityImmutable? _security => order_tuple.security;
-
-      
      // for mini-ob 
      uint _prospective_quantity;
      double _prospective_price;
+      Action<bool> _on_selection_changed;

-
-      public OrderBookRowVM(OrderBookVM owner, OrderSecurityAlgoMeta order_tuple, bool is_expanded) {
+      public OrderBookRowVM(OrderBookVM owner, OrderSecurity order_tuple, bool is_expanded, Action<bool> on_selection_changed) {
         _owner = owner;
         this.order_tuple = order_tuple;
         is_visible = !is_child;
         _is_expanded = is_expanded;
         prospective_quantity = this.quantity;
         prospective_price = this.price;
-         this.invalidated += OrderBookRowVM_invalidated;
-      }
-
-      private void OrderBookRowVM_invalidated() {
-         modify_order_quantity_andor_price?.TryRaiseCanExecuteChanged();
+         _on_selection_changed = on_selection_changed;
      }

      //// This takes care of the case where the OB has all rows visible
@@ -50,22 +45,22 @@ namespace mbts.spark {
      //// when the OrderBookVM.selected_order_changes, this emulates the selected
      //// order changing since the current_row setter invokes the selected_order_changed
      //// handler
-      public IObservable<OrderSecurityAlgoMeta> subscribe_data() {
-         return Observable.FromEvent<Action, OrderSecurityAlgoMeta>(
-            cb => () => cb(order_tuple), 
-            cb => invalidated += cb, 
+      public IObservable<OrderSecurity> subscribe_data() {
+         return Observable.FromEvent<Action, OrderSecurity>(
+            cb => () => cb(order_tuple),
+            cb => invalidated += cb,
            cb => invalidated -= cb);
      }

      public event Action invalidated;
-      public event Action<(OrderSecurityAlgoMeta oldval, OrderSecurityAlgoMeta newval)> updated;
+      public event Action<(OrderSecurity oldval, OrderSecurity newval)> updated;
      public event PropertyChangedEventHandler PropertyChanged;

      // Core
-      public OrderSecurityAlgoMeta order_tuple { get; private set; }
+      public OrderSecurity order_tuple { get; private set; }
      public OrderRecordImmutable order => order_tuple.order;
      public OrderMetadata order_metadata => _owner.get_metadata(this);
-      public Brush badge_fill => _badge_fill ?? (_badge_fill = order_tuple.badge_fill(order_metadata));
+      public Brush badge_fill => _badge_fill ?? (_badge_fill = OrderUtils.badge_fill(order_tuple.meta, order_metadata));
      public uint order_key => order.Key;
      public uint parent_order_key => order.ParentKey;
      public uint security_key => order.security_key();
@@ -98,11 +93,19 @@ namespace mbts.spark {
      public uint quantity => order.quantity();
      public uint filled_quantity => order.filled();
      public string last_msg => order.last_msg();
+      public uint piq => order_tuple.piq ?? uint.MaxValue;
+      public string piq_text => piq == uint.MaxValue ? string.Empty : piq.ToString();
      public bool is_non_terminal => order.is_non_terminal();
      public bool is_attachable { get => _is_attachable; set => SetVisual(ref _is_attachable, value); }
      public bool is_detachable { get => _is_detachable; set => SetVisual(ref _is_detachable, value); }
-
      public string filled_status_desc => order.filled_status_description(security.spec_or_default());
+
+      // Root Algo
+      public CustomOrderDefinition.CustomOneofCase root_algo_order_type => order_tuple.root_algo.value.CustomCase;
+      public OrderMetadata root_algo_order_metadata => _owner.get_metadata(root_algo_order_type);
+      public Brush root_algo_badge_fill => _root_algo_badge_fill ?? (_root_algo_badge_fill = new SolidColorBrush(_root_algo_badge_color));
+      public string root_algo_display_name => order_tuple.root_algo.name;
+
      // Tree
      public bool is_parent { get => _is_parent; set => Set(ref _is_parent, value); }
      public bool is_child => order.has_parent();
@@ -117,7 +120,11 @@ namespace mbts.spark {
      public int depth_level { get => _depth_level; set => Set(ref _depth_level, value); }
      public bool is_selected {
         get => _is_selected;
-         set => Set(ref _is_selected, value);
+         set {
+            if (Set(ref _is_selected, value)) {
+               _on_selection_changed(value);
+            }
+         }
      }
      public uint prospective_quantity {
         get => _prospective_quantity;
@@ -135,45 +142,51 @@ namespace mbts.spark {
            }
         }
      }
-      public bool is_qty_dirty => this.prospective_quantity != this.quantity;     
+      public bool is_qty_dirty => this.prospective_quantity != this.quantity;
      public bool is_price_dirty => this.prospective_price != this.price;

      // Commands
      public ICommand toggle_command => _toggle_expanded_cmd ?? (
         _toggle_expanded_cmd = new DelegateCommand(() => is_expanded = !is_expanded));

-      public ICommand show_order_modify_cmd => 
+      public ICommand show_order_modify_cmd =>
       _show_order_modify_cmd ?? (_show_order_modify_cmd = new DelegateCommand(() => _owner.show_order_modify(this), () => status == OrderStatus.Working));

      public ICommand cancel_command => _cancel_cmd ??
         (_cancel_cmd = new DelegateCommand(() => _owner.cancel_order(this), () => status == OrderStatus.Working || status == OrderStatus.Disconnected));

-      public ICommand modify_order_quantity_andor_price => _modify_order_quantity_andor_price ??
-         (_modify_order_quantity_andor_price = new DelegateCommand(
-            () => {
-               if (is_qty_dirty && is_price_dirty) {
-                  _owner.modify_order_price_and_quantity(this, prospective_price, prospective_quantity);
-               } else if (is_qty_dirty) {
-                  _owner.modify_order_quantity(this, prospective_quantity);
-               } else if (is_price_dirty) {
-                  _owner.modify_order_price(this, this.prospective_price);
+      public ICommand modify_order_quantity_andor_price {
+         get {
+            if (_modify_order_quantity_andor_price == null) {
+               _modify_order_quantity_andor_price = new DelegateCommand(execute, can_execute);
+               invalidated += _modify_order_quantity_andor_price.RaiseCanExecuteChanged;
+               // impl
+               void execute() {
+                  if (is_qty_dirty && is_price_dirty) {
+                     _owner.modify_order_price_and_quantity(this, prospective_price, prospective_quantity);
+                  } else if (is_qty_dirty) {
+                     _owner.modify_order_quantity(this, prospective_quantity);
+                  } else if (is_price_dirty) {
+                     _owner.modify_order_price(this, this.prospective_price);
+                  }
+                  _unselect_me();
               }
-               _unselect_me();
-            }, 
+               bool can_execute() => status == OrderStatus.Working && (is_price_dirty || is_qty_dirty);
+            }
+            return _modify_order_quantity_andor_price;
+         }
+      }
+
+      public ICommand revert_prospective_order_quantity_andor_price => _revert_prospective_order_quantity_andor_price ??
+         (_revert_prospective_order_quantity_andor_price = new DelegateCommand(
+            () => {
+               prospective_price = price;
+               prospective_quantity = quantity;
+            },
            () => this.status == OrderStatus.Working && (is_price_dirty || is_qty_dirty)
         )
      );

-      public ICommand revert_prospective_order_quantity_andor_price => _revert_prospective_order_quantity_andor_price ??
-   (_revert_prospective_order_quantity_andor_price = new DelegateCommand(
-      () => {
-         prospective_price = price;
-         prospective_quantity = quantity;
-      },
-      () => this.status == OrderStatus.Working && (is_price_dirty || is_qty_dirty)
-   )
-);
-
      public ICommand detach_command => _detach_command ??
         (_detach_command = new DelegateCommand(() => {
            _owner.detach_orders(this);
@@ -183,21 +196,37 @@ namespace mbts.spark {
      public ICommand attach_command => _attach_command ?? (
         _attach_command = new DelegateCommand(() => {
            // the _select me will trigger the OBVM.attach_vm to get primed
-            _select_me();
+            if (!is_selected) {
+               _select_me();
+            }
            _owner.begin_attach_algos();
         })
      );

      public ICommand update_command => _update_command ?? (
         _update_command = new DelegateCommand(() => {
-            _select_me();          
+            if (!is_selected) {
+               _select_me();
+            }
         })
      );
+
+      // private props
+      Color _root_algo_badge_color {
+         get => _root_algo_badge_color_backing ?? (_root_algo_badge_color_backing = OrderUtils.badge_color(order_tuple.root_meta, root_algo_order_metadata)).Value;
+         set {
+            if (_root_algo_badge_color_backing != value) {
+               _root_algo_badge_color_backing = value;
+               _root_algo_badge_fill = null;
+            }
+         }
+      }
+
      #region IHierarchicalRow
      bool IHierarchicalRow.is_parent => is_parent;
      bool IHierarchicalRow.is_expanded => is_expanded;
      int IHierarchicalRow.depth_level => depth_level;
-      OrderSecurityAlgoMeta IHierarchicalRow<OrderSecurityAlgoMeta>.value => order_tuple;
+      OrderSecurity IHierarchicalRow<OrderSecurity>.value => order_tuple;

      void IHierarchicalRow.on_is_parent_changed(bool is_parent) => this.is_parent = is_parent;
      /// Do NOT actually call the <see cref="is_expanded"/> setter (it has side effects) - the row collection calls this method when the row is expanded/collapsed by some **external means, outside of this class.
@@ -209,17 +238,15 @@ namespace mbts.spark {
      /// <see cref="OperableHierarchicalCollection{TRow, T, TKey}.collapse_row(TKey)"/>
      void IHierarchicalRow.on_is_expanded_changed(bool is_expanded) => Set(ref _is_expanded, is_expanded, nameof(is_expanded));
      void IHierarchicalRow.on_depth_level_changed(int depth_level) => this.depth_level = depth_level;
-      void IHierarchicalRow<OrderSecurityAlgoMeta>.on_value_changed(OrderSecurityAlgoMeta value) => update(value);
+      void IHierarchicalRow<OrderSecurity>.on_value_changed(OrderSecurity value) => update(value);
      #endregion

      private void _unselect_me() {
         this.is_selected = false;
-         _owner.current_row = null;
      }

      private void _select_me() {
         this.is_selected = true;
-         _owner.current_row = this;
      }

      // These fns present a way for the orderbook to avoid noisy, intermittent collection changes during "Expand/Collapse All" ops,
@@ -227,7 +254,7 @@ namespace mbts.spark {
      internal void expand_internal() => Set(ref _is_expanded, true, nameof(is_expanded));
      internal void collapse_internal() => Set(ref _is_expanded, false, nameof(is_expanded));

-      public void update(OrderSecurityAlgoMeta order_tuple) {
+      public void update(OrderSecurity order_tuple) {
         Log.assert(order_tuple.order.Key == this.order.Key, "OrderBookRowVM: update_order was called with an order with the wrong key.");
         // _show_order_modify_cmd is lazy (instantiated in the default_command getter); it might be null, don't not force instantiation
         bool? could_modify_execute = _show_order_modify_cmd?.CanExecute(null);
@@ -240,11 +267,11 @@ namespace mbts.spark {
         // quantity
         if ((Columns.Size & dirty) != 0)
            RaisePropertyChanged(nameof(quantity), nameof(is_qty_dirty));
-            // we need to update the prospective_quantity here b/c an update could have come in while the row was in edit mode
-            // via the Mini OB update column mechanism (vs the EditableQty column)
-            // prospecive price does not need to be updated in the same manner b/c if the price is changed, the whole
-            // row will no longer match the filter
-            prospective_quantity = quantity;
+         // we need to update the prospective_quantity here b/c an update could have come in while the row was in edit mode
+         // via the Mini OB update column mechanism (vs the EditableQty column)
+         // prospecive price does not need to be updated in the same manner b/c if the price is changed, the whole
+         // row will no longer match the filter
+         prospective_quantity = quantity;
         // price
         if ((Columns.Price & dirty) != 0) {
            RaisePropertyChanged(nameof(price));
@@ -262,6 +289,19 @@ namespace mbts.spark {
         // display name
         if (old_order_tuple.display_name() != order_tuple.display_name())
            RaisePropertyChanged(nameof(display_name));
+         // root badge fill
+         if (_root_algo_badge_color_backing.HasValue) {
+            // only need to invalidate it if it had a value (it is lazily instantiated)
+            _root_algo_badge_color = OrderUtils.badge_color(order_tuple.root_meta, root_algo_order_metadata);
+            RaisePropertyChanged(nameof(root_algo_badge_fill));
+         }
+         // root display name
+         if (old_order_tuple.root_algo.name != order_tuple.root_algo.name)
+            RaisePropertyChanged(nameof(root_algo_display_name));
+         // root order type
+         if (old_order_tuple.root_algo.value.CustomCase != order_tuple.root_algo.value.CustomCase) {
+            RaisePropertyChanged(nameof(root_algo_order_type));
+         }
         // status
         if ((Columns.Status & dirty) != 0)
            RaisePropertyChanged(nameof(status));
@@ -288,7 +328,9 @@ namespace mbts.spark {
            // this will update the cancel column in the mini ob
            cancel_command.TryRaiseCanExecuteChanged();
         }
-
+         if ((Columns.Piq & dirty) != 0) {
+            RaisePropertyChanged(nameof(piq), nameof(piq_text));
+         }
         // always refresh attach and detach b/c
         // conditionally raise invalidated
         if ((dirty & ViewRefresh.invalidate_mask) != 0)
@@ -349,13 +391,14 @@ namespace mbts.spark {
               Columns.Status |
               Columns.ParentKey |
               Columns.AttachedTargetOrderKey |
-               Columns.LastMessage,
+               Columns.LastMessage |
+               Columns.Piq,
            filled_status_desc_mask =
               Columns.Filled |
               Columns.AvgFilled |
               Columns.Status;

-         public static Columns get_dirty_cells(OrderSecurityAlgoMeta oldval, OrderSecurityAlgoMeta newval) {
+         public static Columns get_dirty_cells(OrderSecurity oldval, OrderSecurity newval) {
            var dirty = (Columns)0;
            if (oldval.security != newval.security)
               dirty |= Columns.Security;
@@ -379,8 +422,11 @@ namespace mbts.spark {
               dirty |= Columns.Status;
            if (oldval.order.last_msg() != newval.order.last_msg())
               dirty |= Columns.LastMessage;
+            if (oldval.piq != newval.piq) {
+               dirty |= Columns.Piq;
+            }
            return dirty;
         }
      }
   }
-}
+}
@@ -4,10 +4,10 @@ using bts.api.core;
 using bts.api.orderman;
 using bts.collections;
 using bts.shell;
+using bts.shell.fills;
 using bts.shell.orderbook;
 using bts.spark;
 using bts.utils;
-using mbts.collections;
 using mbts.persist;
 using mbts.spark.utilities;
 using mbts.ui;
@@ -18,8 +18,8 @@ using mbts.ui.spark;
 using mbts.ui.utility;
 using mbts.utils;
 using System;
+using System.Collections;
 using System.Collections.Generic;
-using System.Collections.Immutable;
 using System.Collections.ObjectModel;
 using System.Collections.Specialized;
 using System.Linq;
@@ -31,21 +31,24 @@ using System.Windows.Input;
 using Columns = mbts.spark.OrderBookGridView.ColumnKeys;

 namespace mbts.spark {
-   partial class OrderBookVM : DisposableViewModelBase, IHandleRowSelection, IHandleGridSorting {
+   partial class OrderBookVM : DisposableViewModelBase, IHandleRowSelection, IHandleGridSorting, IRequestRowSelection {
      const double
         _min_right_panel_width = 200,
         _min_order_params_height = 300,
         _min_ladder_height = 100,
         _min_fills_height = 100;
+      static readonly TimeSpan _selection_change_throttle = TimeSpan.FromSeconds(0.1);
+
      readonly IBus _bus;
      readonly OrdersModel _model;
      readonly Property<OrderBookRowVM> _current_row;
      readonly DelegateProperty<bool> _show_order_params, _show_ladder, _show_fills, _can_attach_selected_orders, _can_detach_selected_orders;
-      readonly OperableHierarchicalCollection<OrderBookRowVM, OrderSecurityAlgoMeta, uint> _row_collection;
+      readonly OperableHierarchicalCollection<OrderBookRowVM, OrderSecurity, uint> _row_collection;
      readonly OrderBookColumnCollection _columns;
      readonly IWindowSettingsManager<OrderBookGridSettings> _settings_manager;
-      readonly IWindowSettingsManager<GridSettings> _fills_settings_manager = new WindowSettingsManager<GridSettings>.DisconnectedImpl(FillsWindowFactory.StartupData.MiniGridSettings, FillsWindowFactory.StartupData.MiniGridSettings);
-      readonly SelectedOrderParamsMon _selected_params_mon;
+      readonly IWindowSettingsManager<GridSettings> _fills_settings_manager = new WindowSettingsManager<GridSettings>.DisconnectedImpl(FillsSettings.MiniGridSettings, FillsSettings.MiniGridSettings);
+      readonly OrderParamsAggregator _selected_params_mon;
+      readonly CommonValueMonitor<SecurityImmutable?> _selected_security_mon = new CommonValueMonitor<SecurityImmutable?>();
      readonly RightPanelModel _right_panel = new RightPanelModel();
      OrderBookFillsGridSettings _cached_fills_settings = OrderBookStartupData.DefaultFillsGrid;
      double
@@ -56,18 +59,27 @@ namespace mbts.spark {
      bool
         _show_right_panel = OrderBookStartupData.Default.show_right_panel,
         _is_attaching_orders,
-         _is_row_collection_populated;
-      IReadOnlyDictionary<uint, OrderSecurityAlgoMeta> _cached_orders = DictionaryHelper.empty<uint, OrderSecurityAlgoMeta>();
+         _is_row_collection_populated,
+         _all_rows_selected;
+      IReadOnlyDictionary<uint, OrderSecurity> _cached_orders = DictionaryHelper.empty<uint, OrderSecurity>();
      IReadOnlyDictionary<uint, bool> _cached_attachable = DictionaryHelper.empty<uint, bool>(), _cached_detachable = DictionaryHelper.empty<uint, bool>();
      HashSet<uint>
         _attachable_selected_orders = new HashSet<uint>(),
         _detachable_selected_orders = new HashSet<uint>();
      FilterData _cached_filter_data;
+      Dictionary<uint, IDisposable> _on_updated_single_callback_gatekeeper = new Dictionary<uint, IDisposable>();
+
+      public OrderBookVM(
+         IBus bus, 
+         INotificationService notification_service, 
+         OrdersModel model, 
+         IWindowSettingsManager<OrderBookGridSettings> settings_manager, 
+         bool rows_are_initially_expanded = false) {

-      public OrderBookVM(IObservable<string> owner_title, IBus bus, INotificationService notification_service, OrdersModel model, IWindowSettingsManager<OrderBookGridSettings> settings_manager, bool rows_are_initially_expanded = false) {
         _bus = bus;
         _model = model;
-         _selected_params_mon = new SelectedOrderParamsMon(model.dynamic_helper);
+         _selected_params_mon = new OrderParamsAggregator(model.dynamic_helper, _selection_change_throttle);
+         ladder_vm = new LadderVMContainer(bus, model);
         order_mod_vm = new OrderParamsVM(this, AlgoDefinitionVM.create(model, OrderDataHelper.Defaults.AlgoData(), editing_permissions: AlgoEditingPermissions.AllowEditValues));
         order_mod_vm.algo_vm.editing_permissions_mask = AlgoEditingPermissions.None;
         order_mod_vm.algo_vm.algo_root = null;
@@ -90,8 +102,18 @@ namespace mbts.spark {
         _columns = new OrderBookColumnCollection(bus, model, model.on_order_securities.Select(x => (x.added.Values, x.removed.Values)));
         // we use an ObservableAppendCollection b/c the mini-ob needs a cancel column at the front
         columns = new ObservableAppendCollection<DIYGrid.ColumnBase>(_columns);
-         _row_collection = new OperableHierarchicalCollection<OrderBookRowVM, OrderSecurityAlgoMeta, uint>(
-            o => new OrderBookRowVM(this, o, rows_are_initially_expanded) {
+         _row_collection = new OperableHierarchicalCollection<OrderBookRowVM, OrderSecurity, uint>(
+            o => new OrderBookRowVM(this, o, rows_are_initially_expanded, (row_is_selected) => {
+               // all are selected and one is checked off
+               if (all_rows_selected && !row_is_selected) {
+                  _all_rows_selected = false;
+                  RaisePropertyChanged(nameof(this.all_rows_selected));
+               // not all selected and now the last one gets turned on
+               } else if (!all_rows_selected && _row_collection.All(r => r.is_selected)) {
+                  _all_rows_selected = true;
+                  RaisePropertyChanged(nameof(this.all_rows_selected));
+               }
+            }) {
               is_attachable = _cached_attachable.TryGetValue(o.order.Key, out bool ia) && ia,
               is_detachable = _cached_detachable.TryGetValue(o.order.Key, out bool id)
            },
@@ -118,27 +140,28 @@ namespace mbts.spark {
         toggle_show_fills_cmd = new DelegateCommand(() => show_fills = !show_fills);
         launch_fills_settings_cmd = concated_disposable(new DialogCommand(() => {
            const string title = "Order Book 'Mini' Fills Grid";
-            var vm = new WindowSettingsDialogVM<GridSettings, SimpleGridSettingsVM>(
+            var vm = new ShellSettingsDialogVM<GridSettings, SimpleGridSettingsVM>(
               _fills_settings_manager,
               us => us.fills_grid,
               UserSettings.FileExtensions.GRID,
               s => fills_vm.value.grid_settings_manager.create_vm(
                  // we need to get the most up to date GridSettings when launching b/c users may
                  // have changed some settings on the grid directly, like column widths.
-                  s.with(fills_vm.columns.Select(c => c.create())),
-                  Observable.Return(title)
+                  s.with(fills_vm.columns.Select(c => c.create()))
               ),
               show_save_as_defaults: false);
            // TODO: bind to main window's Title
-            var dialog = new SimpleGridSettingsDialog { Title = title, DataContext = vm };
+            var dialog = new ShellSettingsDialog { Title = title, DataContext = vm };
            vm.RequestClose += (s, e) => WindowUtilities.force_close(dialog);
            return dialog;
         }));
-         grid_settings_manager = new OrderBookGridSettingsManager(owner_title, bus, notification_service, model, rows, columns);
+         grid_settings_manager = new OrderBookGridSettingsManager(bus, notification_service, model, rows, core_columns);
         grid_settings_manager.algo_tree_display_mode_changed += _on_filter_changed;
         IDisposable attach_vm_hooks = null;
         begin_attaching += on_begin_attaching;
         end_attaching += on_end_attaching;
+         // switch between orders and/or orders w/ piq
+         var orders_source = OrdersModel.piq_enabled ? model.on_order_tuples_with_root_and_piq : model.on_order_tuples_with_root;
         concat_disposable(
            connect_order_mod_vm(),
            _can_attach_selected_orders.observe_current().Subscribe(send_attached_orders_async_cmd, begin_attach_cmd),
@@ -155,12 +178,17 @@ namespace mbts.spark {
               if (ch.newval && fills_height < _min_fills_height)
                  fills_height = _min_fills_height;
            }),
+            _selected_security_mon.SubscribeThrottled(_selection_change_throttle).to_security_md(bus).OnDispatcher().Subscribe(smd => ladder_vm.security_md = smd),
+            _subscribe_throttled_selected_rows().OnDispatcher().Subscribe(_ => {
+               var hierarchical_order_keys = new HashSet<uint>(selected_hierarchical_rows.Select(r => r.order_key));
+               ladder_vm.set_orders(hierarchical_order_keys);
+            }),
            _selected_params_mon.subscribe_all_active().Subscribe(on_all_selected_orders_active_changed),
            _selected_params_mon.subscribe_security_plurality().Subscribe(p => {
               security_plurality = p;
               RaisePropertyChanged(nameof(security_plurality));
            }),
-            model.on_order_tuples.OnDispatcher().Subscribe(t => {
+            orders_source.OnDispatcher().Subscribe(t => {
               _cached_orders = t.state;
               _row_collection.update(t.added, t.changed, t.removed.Select(o => o.order.Key));
            }),
@@ -196,7 +224,6 @@ namespace mbts.spark {
            order_mod_vm.algo_vm.connect_data(Observable.Return(model)),
            order_mod_vm.algo_vm.connect_data(_selected_params_mon.subscribe_spreader_security()),
            order_mod_vm.algo_vm,
-            bus.subscribe(SparkTags.SecuritiesTag).OnDispatcher().Subscribe(_selected_params_mon.on_security_md_map),
            attach_vm,
            _show_fills.observe_current(true)
            .Subscribe(is_visible => {
@@ -248,13 +275,20 @@ namespace mbts.spark {
               var order_tups = selected_rows.Select(r => r.order_tuple).ToList();
               var mod_algo_vm = attach_vm.algo_vm.algo_root;
               await Task.WhenAll(order_tups.Select(t => {
-                  var algo = t.order.Def.CustomDef.CloneToMutable();
+                  var algo = t.order.Def.CustomDef.actual().CloneToMutable();
                  mod_algo_vm.assign_to(algo);
+                  if (algo_template_key != 0) {
+                     algo = new CustomOrderDefinition {
+                        Composite = new CompositeOrderDefinition {
+                           AlgoTemplateKey = algo_template_key,
+                           Definition = algo
+                        }
+                     };
+                  }
                  return _model.send_order(
                     t.order.Def.with(
                        attach_target_order_key: t.order.Key,
-                        custom_def: algo,
-                        algo_template_key: algo_template_key
+                        custom_def: algo
                     ),
                     double.IsNaN(price) ? t.order.price() : price,
                     size ?? t.order.quantity());
@@ -268,15 +302,14 @@ namespace mbts.spark {
            Disposable.replace(ref attach_vm_hooks,
               Disposable.Create(
                  connect_common_selected_params(attach_vm),
-                  _selected_params_mon.subscribe_algos().Subscribe(algos => {
+                  attach_vm.algo_vm.observe_algo_root().Subscribe(algo_root => {
                     bool show_price, show_size;
-                     using (var en = algos.Select(a => a.CustomCase).Distinct().GetEnumerator()) {
-                        if (show_price = show_size = en.MoveNext()) {
-                           do {
-                              if (show_price) show_price = AttachConf.show_price(en.Current);
-                              if (show_size) show_size = AttachConf.show_size(en.Current);
-                           } while ((show_price || show_size) && en.MoveNext());
-                        }
+                     if (algo_root == null) {
+                        show_price = false;
+                        show_size = false;
+                     } else {
+                        show_price = AttachConf.show_price(algo_root.order_type);
+                        show_size = AttachConf.show_size(algo_root.order_type);
                     }
                     attach_vm.price_permissions = bool_to_perm(show_price);
                     attach_vm.size_permissions = bool_to_perm(show_size);
@@ -285,7 +318,7 @@ namespace mbts.spark {
                  }),
                  // custom templates (created by user)
                  _model.algo_model.definitions.OnDispatcher().Subscribe(u =>
-                     AlgoCollectionHelper.update_persisted_definition_wrappers(attach_vm.algo_vm.algo_roots as ObservableKeyedCollection<IAlgoVM, AlgoKey>, u, mk_factory(true)))));
+                     AlgoCollectionHelper.update_persisted_definition_wrappers(attach_vm.algo_vm.algo_roots_index, u, mk_factory(true)))));
            // vm factory
            Func<AlgoData, AlgoDefinitionVM> mk_factory(bool connect) =>
               fd => {
@@ -298,8 +331,8 @@ namespace mbts.spark {

         IDisposable connect_order_mod_vm() =>
            Disposable.Create(
-               _selected_params_mon.subscribe_algos().Subscribe(order_mod_vm.algo_vm.load_many),
-               order_mod_vm.subscribe_is_dirty().Subscribe(_ => {
+               _selected_params_mon.subscribe_algos().OnDispatcher().Subscribe(order_mod_vm.algo_vm.load_many),
+               order_mod_vm.subscribe_is_dirty().OnDispatcher().Subscribe(_ => {
                  modify_selected_orders_async_cmd.RaiseCanExecuteChanged();
                  revert_selected_orders_cmd.RaiseCanExecuteChanged();
               }),
@@ -307,10 +340,10 @@ namespace mbts.spark {

         IDisposable connect_common_selected_params(OrderParamsVM vm) =>
            Disposable.Create(
-               _selected_params_mon.subscribe_security_md().Subscribe(newval => vm.security_md = newval),
-               _selected_params_mon.subscribe_price().Subscribe(vm.on_common_price),
-               _selected_params_mon.subscribe_size().Subscribe(vm.on_common_size),
-               _selected_params_mon.subscribe_account().Subscribe(newval => vm.selected_account = newval));
+               _selected_params_mon.subscribe_security().OnDispatcher().to_security_md(bus).OnDispatcher().Subscribe(newval => vm.security_md = newval),
+               _selected_params_mon.subscribe_price().OnDispatcher().Subscribe(vm.on_common_price),
+               _selected_params_mon.subscribe_size().OnDispatcher().Subscribe(vm.on_common_size),
+               _selected_params_mon.subscribe_account().OnDispatcher().Subscribe(newval => vm.selected_account = newval));
      }

      private void _row_collection_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e) {
@@ -319,6 +352,7 @@ namespace mbts.spark {

      public event Action<OrderRecordImmutable?> selected_order_changed;
      public event Action begin_attaching, end_attaching;
+      public event Action<(IEnumerable, bool)> request_selection;

      public ObservableAppendCollection<DIYGrid.ColumnBase> columns { get; }
      public ObservableCollection<DIYGrid.ColumnBase> core_columns => _columns;
@@ -404,6 +438,14 @@ namespace mbts.spark {
      public bool can_attach_selected_orders => _can_attach_selected_orders.Value;
      public bool can_detach_selected_orders => _can_detach_selected_orders.Value;
      public Plurality security_plurality { get; private set; }
+      public bool all_rows_selected {
+         get => _all_rows_selected;
+         set {
+            Set(ref _all_rows_selected, value);
+            request_selection?.Invoke((_row_collection, _all_rows_selected));
+         }
+      }
+      public LadderVMContainer ladder_vm { get; }

      public IObservable<bool> subscribe_show_fills() => _show_fills.observe_current(true);
      public IObservable<bool> subscribe_show_ladder() => _show_ladder.observe_current(true);
@@ -411,23 +453,60 @@ namespace mbts.spark {

      public void row_selection_changed(SelectionChangedEventArgs e) {
         try {
-            using (_selected_params_mon.begin_udpate()) {
+            using (_selected_params_mon.defer_updates())
+            using (_selected_security_mon.defer_updates()) {
               if (e.RemovedItems != null) {
                  foreach (var row_vm in e.RemovedItems.OfType<OrderBookRowVM>()) {
                     row_vm.is_selected = false;
-                     _selected_params_mon.on_row_unselected(row_vm);
+                     _selected_security_mon.remove(row_vm.security);
+                     _selected_params_mon.Remove(_get_root(row_vm.order_tuple));
                     _attachable_selected_orders.Remove(row_vm.order_key);
                     _detachable_selected_orders.Remove(row_vm.order_key);
                  }
               }
               if (e.AddedItems != null) {
                  foreach (var row_vm in e.AddedItems.OfType<OrderBookRowVM>()) {
+                     var root = _get_root(row_vm.order_tuple);
                     row_vm.is_selected = true;
-                     _selected_params_mon.on_row_selected(row_vm);
+                     _selected_security_mon.add(row_vm.security);
+                     if (!_on_updated_single_callback_gatekeeper.ContainsKey(row_vm.order_key)) {
+                        row_vm.updated += on_updated;
+                        _on_updated_single_callback_gatekeeper.Add(row_vm.order_key, Disposable.Create(() => row_vm.updated -= on_updated));
+                     }
+                     _selected_params_mon.Add(root);
                     if (row_vm.is_attachable)
                        _attachable_selected_orders.Add(row_vm.order_key);
                     if (row_vm.is_detachable)
                        _detachable_selected_orders.Add(row_vm.order_key);
+                     void on_updated((OrderSecurity oldval, OrderSecurity newval) change) {
+                        if (!row_vm.is_selected) {
+                           // self destruct
+                           if (_on_updated_single_callback_gatekeeper.TryGetValue(row_vm.order_key, out var unsubscribe_updated_disposable)) {
+                              unsubscribe_updated_disposable.Dispose();
+                              _on_updated_single_callback_gatekeeper.Remove(row_vm.order_key);
+                           }
+                           _selected_params_mon.Remove(_get_root(row_vm.order_tuple));
+                           _selected_security_mon.remove(row_vm.security);
+                           return;
+                        }
+                        var new_root = _get_root(change.newval);
+                        if (!new_root.Equals(root)) {
+                           using (_selected_params_mon.defer_updates()) {
+                              // unselect and select in one smooth motion via on_row_updated
+                              // because we thought there may be gremlins afoot when doing
+                              // on_row_unselected and then on_row_selected
+                              _selected_params_mon.Remove(root);
+                              _selected_params_mon.Add(new_root);
+                              root = new_root;
+                           }
+                        }
+                        if (change.oldval.security?.Id != change.newval.security?.Id) {
+                           using (_selected_security_mon.defer_updates()) {
+                              _selected_security_mon.remove(change.oldval.security);
+                              _selected_security_mon.add(change.newval.security);
+                           }
+                        }
+                     }
                  }
               }
               RowSelectionHelper.apply_changes(selected_rows, e);
@@ -505,11 +584,11 @@ namespace mbts.spark {
            if (!new_sort.Equals(old_sort)) {
               /// Both filter and sort have changed, use <see cref="OperableHierarchicalCollection{TRow, T, TKey}.defer_refresh"/> to avoid syncing twice.
               using (_row_collection.defer_refresh()) {
-                  _row_collection.filter = new_filter.build_predicate();
+                  _row_collection.filter = new_filter.build_predicate(_model.dynamic_helper.dynamic_type_index);
                  _row_collection.comparer = new_sort.comparer;
               }
            } else {
-               _row_collection.filter = new_filter.build_predicate();
+               _row_collection.filter = new_filter.build_predicate(_model.dynamic_helper.dynamic_type_index);
            }
         } else if (!new_sort.Equals(old_sort))
            _row_collection.comparer = new_sort.comparer;
@@ -529,21 +608,28 @@ namespace mbts.spark {

      public void begin_attach_algos() => is_attaching_orders = true;

-      public bool try_get_parent(OrderBookRowVM row, out OrderSecurityAlgoMeta parent) =>
-         _cached_orders.TryGetValue(row.parent_order_key, out parent);
+      internal void detach_orders(OrderBookRowVM row) {
+         if (row.is_selected) {
+            _detach_orders_async(selected_rows).ignore();
+         } else {
+            _detach_orders_async(new[] { row }).ignore();
+         }
+      }

-      internal void detach_orders(OrderBookRowVM order) =>
-         _detach_orders_async(new[] { order }).ignore();
+      public OrderMetadata get_metadata(CustomOrderDefinition.CustomOneofCase order_type) => _model.factory.get_metadata(order_type);

-      public OrderMetadata get_metadata(OrderBookRowVM row) => _model.factory.get_metadata(row.order_type);
-
-      internal OrderBookRowVM get_parent(OrderBookRowVM row) => _row_collection.get_parent(row.order_key);
+      public OrderMetadata get_metadata(OrderBookRowVM row) => _model.factory.get_metadata(row.order.actual_order_type());

      internal void show_order_modify(OrderBookRowVM row) =>
         _bus.post(SparkTags.ShowModifyOrderTag, row.order_key);

-      internal void cancel_order(OrderBookRowVM row) =>
-         _bus.post(SparkTags.CancelOrders, new List<uint> { row.order_key });
+      internal void cancel_order(OrderBookRowVM row) {
+         if (row.is_selected) {
+            _bus.post(SparkTags.CancelOrders, selected_rows.Select(r => r.order_key).ToList());
+         } else {
+            _bus.post(SparkTags.CancelOrders, new List<uint> { row.order_key });
+         }
+      }

      internal void modify_order_quantity(OrderBookRowVM row, uint size) =>
         _bus.post(SparkTags.UpdateOrder, (row.order_key, row.price, size));
@@ -562,11 +648,17 @@ namespace mbts.spark {
         }
      }

+      OrderSecurity _get_root(OrderSecurity os) {
+         while (os.order.ParentKey != 0 && _cached_orders.TryGetValue(os.order.ParentKey, out var pos))
+            os = pos;
+         return os;
+      }
+
      void _on_filter_changed() {
         var fd = new FilterData(grid_settings_manager.algo_tree_display_mode, _columns.create_filter_states());
         if (!fd.Equals(_cached_filter_data)) {
            _cached_filter_data = fd;
-            _row_collection.filter = fd.build_predicate();
+            _row_collection.filter = fd.build_predicate(_model.dynamic_helper.dynamic_type_index);
         }
      }

@@ -582,6 +674,7 @@ namespace mbts.spark {
         }
      }

+      // Note: modifications are performed on the selected orders' ROOT orders.
      async Task _modify_selected_orders_async() {
         double? price = DoubleHelper.nan_nullable(order_mod_vm.price);
         uint? size = order_mod_vm.size;
@@ -594,13 +687,17 @@ namespace mbts.spark {
            // their values will be cleared (in the param grid gui), and the modifications will not be applied.
            // FYI this behavior is implemented to support 'partial edits.' (e.g., changing the 'price' for multiple orders that do not have the same 'size').
            // ----
-            var update_params = selected_rows.Select(update_params_factory).ToList();
+            var update_params = selected_rows.Select(r => update_params_factory(_get_root(r.order_tuple))).ToList();
            await Task.WhenAll(update_params.Select(t => _model.update_order(t.order, new_price: price, new_size: size, new_algo: t.new_algo)));
-            (OrderRecordImmutable order, CustomOrderDefinitionImmutable? new_algo) update_params_factory(OrderBookRowVM row) {
-               var mod_algo = row.order.Def.CustomDef.CloneToMutable();
-               mod_algo_vm.assign_to(mod_algo);
+            (OrderRecordImmutable order, CustomOrderDefinitionImmutable? new_algo) update_params_factory(OrderSecurity order_tuple) {
+               var mod_algo = order_tuple.order.Def.CustomDef.CloneToMutable();
+               if (mod_algo.CustomCase == CustomOrderDefinition.CustomOneofCase.Composite) {
+                  mod_algo_vm.assign_to(mod_algo.Composite.Definition);
+               } else {
+                  mod_algo_vm.assign_to(mod_algo);
+               }
               var mod_algoi = new CustomOrderDefinitionImmutable(mod_algo);
-               return (row.order, OrderDataHelper.EqualsHelpers.equals(row.order.Def.CustomDef, mod_algoi) ? (CustomOrderDefinitionImmutable?)null : mod_algoi);
+               return (order_tuple.order, OrderDataHelper.EqualsHelpers.equals(order_tuple.order.Def.CustomDef, mod_algoi) ? (CustomOrderDefinitionImmutable?)null : mod_algoi);
            }
         } else await Task.WhenAll(selected_rows.Select(r => _model.update_order(r.order, price)));
      }
@@ -643,52 +740,6 @@ namespace mbts.spark {
         }
      }

-      static IObservable<ISet<uint>> _subscribe_selected_order_keys(ObservableCollection<OrderBookRowVM> selected_rows) =>
-         Observable.Create<ISet<uint>>(o => {
-            bool waiting_for_mouse_up = false;
-            var sub_container = new DisposableContainer();
-            var builder = ImmutableHashSet<uint>.Empty.ToBuilder();
-            foreach (var row in selected_rows)
-               builder.Add(row.order_key);
-            var selected_keys = builder.ToImmutable();
-            o.OnNext(selected_keys);
-            return Disposable.Create(selected_rows.Subscribe(on_selection_changed), sub_container);
-            void on_selection_changed(object sender, NotifyCollectionChangedEventArgs e) {
-               if (waiting_for_mouse_up)
-                  return;
-               switch (e.Action) {
-                  case NotifyCollectionChangedAction.Add:
-                  case NotifyCollectionChangedAction.Replace:
-                     foreach (OrderBookRowVM row in e.NewItems)
-                        selected_keys = selected_keys.Add(row.order_key);
-                     break;
-                  case NotifyCollectionChangedAction.Remove:
-                     foreach (OrderBookRowVM row in e.OldItems)
-                        selected_keys = selected_keys.Remove(row.order_key);
-                     break;
-                  case NotifyCollectionChangedAction.Reset:
-                     selected_keys = ImmutableHashSet<uint>.Empty;
-                     break;
-                  default: return;
-               }
-               if (Mouse.LeftButton == MouseButtonState.Pressed) {
-                  waiting_for_mouse_up = true;
-                  wait_for_mouse_up();
-                  async void wait_for_mouse_up() {
-                     await Wait.until_true(() => Mouse.LeftButton == MouseButtonState.Released, TimeSpan.FromSeconds(60), 333);
-                     builder = ImmutableHashSet<uint>.Empty.ToBuilder();
-                     foreach (var row in selected_rows)
-                        builder.Add(row.order_key);
-                     selected_keys = builder.ToImmutable();
-                     o.OnNext(selected_keys);
-                     waiting_for_mouse_up = false;
-                  }
-               } else {
-                  o.OnNext(selected_keys);
-               }
-            }
-         });
-
      public class OrderParamsVM : DisposableViewModelBase {
         readonly SelectorProperty<AccountTuple, AccountTuple?> _accounts;
         readonly OrderBookVM _owner;
@@ -699,8 +750,6 @@ namespace mbts.spark {
         AlgoParamPermissions
            _price_permissions = AlgoParamPermissions.ReadOnly | AlgoParamPermissions.Write,
            _size_permissions = AlgoParamPermissions.ReadOnly | AlgoParamPermissions.Write;
-         HashSet<uint> _selected_order_tree = new HashSet<uint>();
-         LadderVM _ladder_vm;
         SecurityMD? _security_md;

         public OrderParamsVM(OrderBookVM owner)
@@ -751,13 +800,7 @@ namespace mbts.spark {
                     appended_param_rows.insert_front(new AlgoParamRowVM(root, _price_param, null, AlgoParamTemplateKeys.Price));
                  }
               }),
-               ObservableAutoWrapper.connect_item_hooks(param_rows, dirty_params_mon.join),
-               owner._subscribe_throttled_selected_rows().OnDispatcher().Subscribe(_ => {
-                  _selected_order_tree = new HashSet<uint>(_owner.selected_hierarchical_rows.Select(r => r.order_key));
-                  _reset_ladder_vm();
-               })) {
-               () => Disposable.dispose(ref _ladder_vm)
-            };
+               ObservableAutoWrapper.connect_item_hooks(param_rows, dirty_params_mon.join));
            // payup methods
            void payup_bid(int ticks) => payup(bbo.bid, -ticks);
            void payup_ask(int ticks) => payup(bbo.ask, ticks);
@@ -785,8 +828,7 @@ namespace mbts.spark {
            get => _security_md;
            set {
               if (Set(ref _security_md, value)) {
-                  _reset_ladder_vm();
-                  RaisePropertyChanged(nameof(security), nameof(spec), nameof(ladder_vm));
+                  RaisePropertyChanged(nameof(security), nameof(spec));
                  bbo.security_md = value;
                  _payup_bid_cmd.RaiseCanExecuteChanged();
                  _payup_ask_cmd.RaiseCanExecuteChanged();
@@ -810,7 +852,6 @@ namespace mbts.spark {
         }
         public AlgoDefinitionVM algo_vm { get; }
         public IReadOnlyObservableCollection<AlgoParamRowVM> param_rows { get; }
-         public LadderVM ladder_vm => _ladder_vm;
         public BBOVM bbo { get; }
         public ICommand send_order { get; }
         public ICommand payup_bid_cmd => _payup_bid_cmd;
@@ -840,21 +881,11 @@ namespace mbts.spark {
               revert();
         }

-         public void revert() {
-            foreach (var r in param_rows)
-               r.param.revert();
-         }
+         public void revert() =>
+            param_rows.revert_all();
+
         public IObservable<bool> subscribe_is_dirty() => _is_dirty.observe_current(true);

-         void _reset_ladder_vm() {
-            if (_ladder_vm == null && !_security_md.HasValue)
-               return;
-            Disposable.replace(ref _ladder_vm,
-               _security_md.HasValue ?
-                  LadderVM.create_readonly(_owner._bus, new LadderModel(security_md.Value, _owner._model, new Func<OrderSecurity, bool>(osec => _selected_order_tree.Contains(osec.order.Key)))) :
-                  null);
-            RaisePropertyChanged(nameof(ladder_vm));
-         }
         void _assign_param_permissions<T>(IAlgoParamVM<T> param, ref AlgoParamPermissions permissions_backing, AlgoParamPermissions permissions) {
            if (permissions_backing != permissions) {
               permissions_backing = permissions;
@@ -873,8 +904,8 @@ namespace mbts.spark {
            this.column_filters = column_filters;
         }

-         public Func<OrderSecurityAlgoMeta, bool> build_predicate() {
-            var pred = column_filters.build_predicate();
+         public Func<OrderSecurity, bool> build_predicate(IMaskIndexInt32<string> dynamic_type_index) {
+            var pred = column_filters.build_predicate(dynamic_type_index);
            if (algo_tree_display_mode == AlgoTreeDisplayMode.RootAndLeafNodes) {
               if (pred == null) {
                  pred = tree_disp_pred;
@@ -882,7 +913,7 @@ namespace mbts.spark {
                  var col_pred = pred;
                  pred = o => tree_disp_pred(o) && col_pred(o);
               }
-               bool tree_disp_pred(OrderSecurityAlgoMeta o) =>
+               bool tree_disp_pred(OrderSecurity o) =>
                  !o.order.has_parent() ||
                  o.order.is_exchange_order() ||
                  o.order.order_type() == CustomOrderDefinition.CustomOneofCase.Spreader;
@@ -901,132 +932,6 @@ namespace mbts.spark {
            EqualityComparer.aggregate_hash((int)algo_tree_display_mode, column_filters?.GetHashCode() ?? 0);
      }

-      /// <summary>
-      /// Monitors selected rows, and determines whether or not they are all active-orders, with common parameters.
-      /// </summary>
-      class SelectedOrderParamsMon {
-         static readonly TimeSpan _throttle = TimeSpan.FromSeconds(0.1);
-         readonly CommonValueGroupMonitor<AlgoSecurityKey, AlgoSecurityKey> _algo_def_mon =
-            new CommonValueGroupMonitor<AlgoSecurityKey, AlgoSecurityKey>(
-               ask => ask,
-               EqualityComparer<AlgoSecurityKey>.Default,
-               EqualityComparer.Create<AlgoSecurityKey, CustomOrderDefinitionImmutable>(ask => ask.algo, OrderDataHelper.EqualsHelpers.custom_order_def_compareri));
-         readonly CommonValueMonitor<SecurityImmutable?> _spreader_security_mon = new CommonValueMonitor<SecurityImmutable?>();
-         readonly CommonValueMonitor<SecurityImmutable?> _security_mon = new CommonValueMonitor<SecurityImmutable?>();
-         readonly CommonValueMonitor<double> _price_mon = new CommonValueMonitor<double>(double.NaN);
-         readonly CommonValueMonitor<uint> _size_mon = new CommonValueMonitor<uint>();
-         readonly CommonValueMonitor<AccountTuple> _account_mon = new CommonValueMonitor<AccountTuple>();
-         readonly CommonValueMonitor<bool> _all_active_mon = new CommonValueMonitor<bool>();
-         readonly CommonValueMonitorMultiplexor<OrderSecurityAlgoMeta> _group_mon = new CommonValueMonitorMultiplexor<OrderSecurityAlgoMeta>();
-         readonly DynamicOrderHelper _dyn_helper;
-         IReadOnlyDictionary<uint, SecurityMD> _security_md_map = DictionaryHelper.empty<uint, SecurityMD>();
-
-         public SelectedOrderParamsMon(DynamicOrderHelper dyn_helper) {
-            _dyn_helper = dyn_helper;
-            _group_mon.add_member_mon(_algo_def_mon, _algo_key);
-            _group_mon.add_member_mon(_spreader_security_mon, _get_spreader_sec, s => s.HasValue);
-            _group_mon.add_member_mon(_security_mon, osam => osam.security, s => s.HasValue);
-            _group_mon.add_member_mon(_price_mon, osam => osam.order.price());
-            _group_mon.add_member_mon(_size_mon, osam => osam.order.quantity());
-            _group_mon.add_member_mon(_account_mon, osam => new AccountTuple(osam.order.account_id(), osam.order.account()));
-            _group_mon.add_member_mon(_all_active_mon, osam => osam.order.is_active());
-         }
-
-         event Action _security_md_map_changed;
-
-         public SecurityImmutable? security => _security_mon.common_value;
-         public SecurityMD? security_md => security is SecurityImmutable sec && _security_md_map.TryGetValue(sec.Id, out SecurityMD smd) ? smd : (SecurityMD?)null;
-         public SecurityImmutable? spreader_security => _spreader_security_mon.common_value;
-         public double price => _price_mon.try_get_common_value(out double p) ? p : double.NaN;
-         public uint? size => _size_mon.common_value_nullable();
-         public AccountTuple? account => _account_mon.common_value_nullable();
-         public bool all_active => _all_active_mon.common_value;
-
-         public IObservable<IEnumerable<CustomOrderDefinitionImmutable>> subscribe_algos() => _algo_def_mon.SubscribeThrottled(_throttle, (ask, vals) => vals.Select(v => v.algo), Enumerable.Empty<CustomOrderDefinitionImmutable>());
-         public IObservable<SecurityImmutable?> subscribe_spreader_security() => _spreader_security_mon.SubscribeThrottled(_throttle);
-         public IObservable<SecurityImmutable?> subscribe_security() => _security_mon.SubscribeThrottled(_throttle);
-         public IObservable<SecurityMD?> subscribe_security_md() =>
-            Observable.Create<SecurityMD?>(o => {
-               SecurityMD? last_value = security_md;
-               o.OnNext(last_value);
-               _security_mon.common_value_changed += on_common_sec_changed;
-               _security_md_map_changed += refresh;
-               return Disposable.Create(() => {
-                  _security_mon.common_value_changed -= on_common_sec_changed;
-                  _security_md_map_changed -= refresh;
-               });
-               void on_common_sec_changed(SecurityImmutable? _) => refresh();
-               void refresh() {
-                  var curr = security_md;
-                  if (curr != last_value)
-                     o.OnNext(last_value = curr);
-               }
-            });
-         public IObservable<double> subscribe_price() => _price_mon.SubscribeThrottled(_throttle);
-         public IObservable<uint?> subscribe_size() => _size_mon.SubscribeThrottledNullable(_throttle);
-         public IObservable<AccountTuple?> subscribe_account() => _account_mon.SubscribeThrottledNullable(_throttle);
-         public IObservable<bool> subscribe_all_active() => _all_active_mon.SubscribeThrottled(_throttle);
-         public IObservable<Plurality> subscribe_security_plurality() => _security_mon.SubscribePluralityThrottled(_throttle);
-
-         public IDisposable begin_udpate() =>
-            _group_mon.defer_updates();
-
-         public void on_row_selected(OrderBookRowVM row) {
-            _group_mon.add(row.order_tuple);
-            row.updated += _on_row_updated;
-         }
-
-         public void on_row_unselected(OrderBookRowVM row) {
-            _group_mon.remove(row.order_tuple);
-            row.updated -= _on_row_updated;
-         }
-
-         public void on_security_md_map(IReadOnlyDictionary<uint, SecurityMD> security_md_map) {
-            _security_md_map = security_md_map;
-            _security_md_map_changed?.Invoke();
-         }
-
-         void _on_row_updated((OrderSecurityAlgoMeta oldval, OrderSecurityAlgoMeta newval) ch) {
-            using (begin_udpate()) {
-               _group_mon.remove(ch.oldval);
-               _group_mon.add(ch.newval);
-            }
-         }
-
-         static SecurityImmutable? _get_spreader_sec(OrderSecurityAlgoMeta osam) =>
-            OrderDataHelper.enumerate_algo_hierarchy(osam.order.Def.CustomDef.CloneToMutable())
-            .Any(algo => algo.CustomCase == CustomOrderDefinition.CustomOneofCase.Spreader) ?
-            osam.security : null;
-
-         AlgoSecurityKey _algo_key(OrderSecurityAlgoMeta osam) =>
-            new AlgoSecurityKey(osam.order.Def.CustomDef, _get_spreader_sec(osam), AlgoStructureSerializer.structure_key(osam.order.Def.CustomDef, _dyn_helper.dynamic_type_index));
-
-         SecurityMD? _get_sec_md(OrderSecurityAlgoMeta osam) =>
-            osam.security.HasValue && _security_md_map.TryGetValue(osam.security.Value.Id, out SecurityMD smd) ? smd : (SecurityMD?)null;
-
-         struct AlgoSecurityKey {
-            public readonly CustomOrderDefinitionImmutable algo;
-            public readonly SecurityImmutable? security;
-            public readonly AlgoStructureKey key;
-
-            public AlgoSecurityKey(CustomOrderDefinitionImmutable algo, SecurityImmutable? security, AlgoStructureKey key) {
-               this.algo = algo;
-               this.security = security;
-               this.key = key;
-            }
-
-            public bool Equals(AlgoSecurityKey other) =>
-               security == other.security &&
-               key == other.key;
-
-            public override bool Equals(object obj) => obj is AlgoSecurityKey other && Equals(other);
-            public override int GetHashCode() => key.GetHashCode();
-
-            public static bool operator ==(AlgoSecurityKey a, AlgoSecurityKey b) => a.Equals(b);
-            public static bool operator !=(AlgoSecurityKey a, AlgoSecurityKey b) => !a.Equals(b);
-         }
-      }
-
      class RightPanelModel {
         OrderBookRightPanelSettings.ViewMode _mode;
         OrderBookRightPanelSettings.Components _all_selected, _hidden = OrderBookRightPanelSettings.Components.None;
@@ -1089,11 +994,13 @@ namespace mbts.spark {
            var join = config.Configuration.get<bts.config.JoinAttachUIOptions>();
            var lean = config.Configuration.get<bts.config.LeanAttachUIOptions>();
            var top = config.Configuration.get<bts.config.TopAttachUIOptions>();
+            var offset = config.Configuration.get<bts.config.OffsetAttachUIOptions>();
            _algo_type_conf = new Dictionary<CustomOrderDefinition.CustomOneofCase, (bool, bool)> {
               { CustomOrderDefinition.CustomOneofCase.Cover, (cover.show_price, cover.show_quantity) },
               { CustomOrderDefinition.CustomOneofCase.Join, (join.show_price, join.show_quantity) },
               { CustomOrderDefinition.CustomOneofCase.Lean, (lean.show_price, lean.show_quantity) },
-               { CustomOrderDefinition.CustomOneofCase.Top, (top.show_price, top.show_quantity) }
+               { CustomOrderDefinition.CustomOneofCase.Top, (top.show_price, top.show_quantity) },
+               { CustomOrderDefinition.CustomOneofCase.Offset, (offset.show_price, offset.show_quantity) }
            };
         }

@@ -1104,4 +1011,4 @@ namespace mbts.spark {
            !_algo_type_conf.TryGetValue(algo_type, out var result) || result.show_size;
      }
   }
-}
+}
@@ -1,13 +1,14 @@
 using bts.api;
 using bts.api.orderman;
 using bts.shell;
+using bts.shell.fills;
 using bts.shell.orderbook;
 using bts.spark;
 using bts.view;
 using mbts.persist;
 using mbts.ui;
-using mbts.ui.converters;
 using mbts.ui.extensions;
+using mbts.ui.shell;
 using mbts.ui.spark;
 using mbts.ui.utility;
 using mbts.utils;
@@ -16,10 +17,8 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Reactive.Linq;
 using System.Windows;
-using System.Windows.Data;
 using System.Windows.Input;
 using System.Windows.Media;
-using OrderBookGridSettingsVM = mbts.spark.GridSettingsVM<bts.api.orderman.OrderSecurity, mbts.OrderRecordTuplePredicate, bts.shell.orderbook.OrderBookGridSettings>;

 namespace mbts.spark {
   internal class OrderBookWindow : SparkWindow<OrderBookStartupData>, ISharedWindow {
@@ -64,11 +63,11 @@ namespace mbts.spark {
      }

      public void thread_init() {
-         _vm = new OrderBookVM(this.observe_title(), _bus, _notification_service, _model, _settings_manager);
+         _vm = new OrderBookVM(_bus, _notification_service, _model, _settings_manager);
         _vm.load_from(_state);
         _view = new OrderBookView(_vm);

-         var show_fills_command = SparkCommands.ShowFills(SparkCommands.KeyGestures.ShowFills).complete(() => new FillsWindowFactory.StartupData(_vm.selected_orders.Select(r => r.Key).ToArray()));
+         var show_fills_command = SparkCommands.ShowFills(SparkCommands.KeyGestures.ShowFills).complete(() => new FillsSettings(_vm.selected_orders.Select(r => r.Key).ToArray()));

         var toggle_show_right_panel_command = new SparkCommandCommand(
            get_toggle_show_right_panel_cmd_title(),
@@ -160,7 +159,7 @@ namespace mbts.spark {
         toggle_expand_all_command.group = CommandGroups.Auxiliary;

         var show_grid_settings_command = SparkCommands.window_settings_command(new DialogCommand(() => {
-            var gs_vm = new WindowSettingsDialogVM<OrderBookGridSettings, OrderBookSettingsVM>(
+            var gs_vm = new ShellSettingsDialogVM<OrderBookGridSettings, OrderBookSettingsVM>(
               _settings_manager,
               us => us.order_book_grid,
               UserSettings.FileExtensions.GRID,
@@ -170,14 +169,11 @@ namespace mbts.spark {
                  // we need to get the most up to date GridSettings when launching b/c users may
                  // have changed some settings on the grid directly, like column widths.
                  s.general = s.general.with(_vm.core_columns.Select(c => c.create()));
-                  return _vm.grid_settings_manager.create_vm(s, this.observe_title());
+                  return _vm.grid_settings_manager.create_vm(s);
               }
            );
-            // TODO: bind to main window's Title
-            var dialog = new SimpleGridSettingsDialog { DataContext = gs_vm };
-            dialog.SetBinding(Window.TitleProperty, new Binding($"{nameof(gs_vm.instance_vm)}.{nameof(OrderBookGridSettingsVM.owner_title)}") {
-               Converter = ValueConverter.create<string, string>(str => (string.IsNullOrEmpty(str) ? _default_title : str) + " Settings")
-            });
+            gs_vm.SubscribeDisposed(literal_title_source.OnDispatcher().Subscribe(t => gs_vm.title = t));
+            var dialog = new ShellSettingsDialog { DataContext = gs_vm };
            gs_vm.RequestClose += (s, e) => WindowUtilities.force_close(dialog);
            return dialog;
         }));
@@ -1,4 +1,5 @@
-using mbts.ui;
+using bts.shell.fills;
+using mbts.ui;
 using ProtoBuf;
 using System.Collections.Generic;
 using GridSettings = mbts.ui.settings.GridSettings;
@@ -9,11 +10,11 @@ namespace bts.shell.orderbook {
      [ProtoMember(1)]
      public GridSettings general { get; set; }
      [ProtoMember(2)]
-      public FillsWindowFactory.FilterStates filters { get; set; }
+      public FillsFilterStates filters { get; set; }
      [ProtoMember(3)]
      public List<SortingCriteria> sorting_criterion { get; set; }

-      public FillsWindowFactory.StartupData to_startup_data() =>
-         new FillsWindowFactory.StartupData(null, sorting_criterion, filters, general);
+      public FillsSettings to_startup_data() =>
+         new FillsSettings(null, sorting_criterion, filters, general);
   }
 }
@@ -1,194 +1,155 @@
-using bts.api;
-using bts.api.orderman;
-using bts.utils;
-using mbts;
-using mbts.spark;
-using mbts.spark.filters;
-using mbts.ui;
-using ProtoBuf;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
-namespace bts.shell.orderbook {
-   [ProtoContract]
-   class FilterStates : IEquatable<FilterStates> {
-      [ProtoMember(1)]
-      public SecurityCriteria security_criteria;
-      [ProtoMember(2)]
-      public string order_key_regex;
-      [ProtoMember(3)]
-      public TimeFilterTuple time_created;
-      [ProtoMember(4)]
-      public string[] users;
-      [ProtoMember(5)]
-      public string[] accounts;
-      [ProtoMember(6)]
-      public Venue[] exchanges;
-      [ProtoMember(7)]
-      public TimeInForce[] tifs;
-      [ProtoMember(8)]
-      public CustomOrderDefinition.CustomOneofCase[] order_types;
-      [ProtoMember(9)]
-      public Side[] sides;
-      [ProtoMember(10)]
-      public UIntMinMaxState qty;
-      [ProtoMember(11)]
-      public DoubleMinMaxState price;
-      [ProtoMember(12)]
-      public UIntMinMaxState qty_filled;
-      [ProtoMember(13)]
-      public DoubleMinMaxState avg_price;
-      [ProtoMember(14)]
-      public DoubleMinMaxState last_price;
-      [ProtoMember(15)]
-      public OrderStatus[] statuses;
-      [ProtoMember(16)]
-      public string exchange_message_regex;
-      [ProtoMember(17)]
-      public TimeFilterTuple last_change;
-      //[ProtoMember(18)]
-      //public string security_regex;
-      [ProtoMember(19)]
-      public api.orderman.OrderSubType[] order_sub_types;
-      [ProtoMember(20)]
-      public string[] symbols;
-      [ProtoMember(21)]
-      public string parent_key_regex;
-      [ProtoMember(22)]
-      public string attached_target_order_key_regex;
-
-      public bool Equals(FilterStates other) =>
-         other != null &&
-         security_criteria.safe_equals(other.security_criteria) &&
-         order_key_regex == other.order_key_regex &&
-         parent_key_regex == other.parent_key_regex &&
-         attached_target_order_key_regex == other.attached_target_order_key_regex &&
-         time_created.Equals(other.time_created) &&
-         EqualityComparer.safe_sequence_equals(users, other.users) &&
-         EqualityComparer.safe_sequence_equals(accounts, other.accounts) &&
-         EqualityComparer.safe_sequence_equals(exchanges, other.exchanges) &&
-         EqualityComparer.safe_sequence_equals(tifs, other.tifs) &&
-         EqualityComparer.safe_sequence_equals(order_types, other.order_types) &&
-         EqualityComparer.safe_sequence_equals(sides, other.sides) &&
-         qty.safe_equals(other.qty) &&
-         price.safe_equals(other.price) &&
-         qty_filled.safe_equals(other.qty_filled) &&
-         avg_price.safe_equals(other.avg_price) &&
-         last_price.safe_equals(other.last_price) &&
-         EqualityComparer.safe_sequence_equals(statuses, other.statuses) &&
-         exchange_message_regex == other.exchange_message_regex &&
-         last_change.Equals(other.last_change) &&
-         EqualityComparer.safe_sequence_equals(order_sub_types, other.order_sub_types) &&
-         EqualityComparer.safe_sequence_equals(symbols, other.symbols);
-
-      public override bool Equals(object obj) => Equals(obj as FilterStates);
-
-      public override int GetHashCode() =>
-         EqualityComparer.aggregate_hash(
-            security_criteria?.GetHashCode() ?? 0,
-            order_key_regex?.GetHashCode() ?? 0,
-            parent_key_regex?.GetHashCode() ?? 0,
-            attached_target_order_key_regex?.GetHashCode() ?? 0,
-            time_created.GetHashCode(),
-            EqualityComparer.safe_aggregate_hash(users),
-            EqualityComparer.safe_aggregate_hash(accounts),
-            EqualityComparer.safe_aggregate_hash(exchanges),
-            EqualityComparer.safe_aggregate_hash(tifs),
-            EqualityComparer.safe_aggregate_hash(order_types),
-            EqualityComparer.safe_aggregate_hash(sides),
-            qty?.GetHashCode() ?? 0,
-            price?.GetHashCode() ?? 0,
-            qty_filled?.GetHashCode() ?? 0,
-            avg_price?.GetHashCode() ?? 0,
-            last_price?.GetHashCode() ?? 0,
-            EqualityComparer.safe_aggregate_hash(statuses),
-            exchange_message_regex?.GetHashCode() ?? 0,
-            last_change.GetHashCode(),
-            EqualityComparer.safe_aggregate_hash(order_sub_types),
-            EqualityComparer.safe_aggregate_hash(symbols));
-   }
-
-   static class FilterStatesExtensions {
-      public static Func<OrderSecurityAlgoMeta, bool> build_predicate(this FilterStates fs) {
-         var predicates = new List<Func<OrderSecurityAlgoMeta, bool>>();
-         // security
-         if (fs.security_criteria?.is_defined() ?? false)
-            predicates.Add(o => o.security.HasValue && ContractPickerModel.security_in_criteria(fs.security_criteria, o.security.Value));
-         // regex
-         add_regex(fs.order_key_regex, o => o.order.Key.ToString());
-         add_regex(fs.exchange_message_regex, o => o.order.State.LastMsg);
-         add_regex(fs.attached_target_order_key_regex, o => o.order.attached_target_order_key().ToString());
-         add_regex(fs.parent_key_regex, o => o.order.ParentKey.ToString());
-         // time
-         add_time_filter(fs.time_created, o => o.order.created());
-         add_time_filter(fs.last_change, o => o.order.last_change());
-         // discrete values
-         add_discrete_values(fs.users, o => o.order.user());
-         add_discrete_values(fs.accounts, o => o.order.account());
-         add_discrete_values(fs.exchanges, o => o.security?.Exchange ?? Venue.Unset);
-         add_discrete_values(fs.tifs, o => o.order.time_in_force());
-         add_discrete_values(fs.order_types, o => o.order.order_type());
-         add_discrete_values(fs.order_sub_types, o => o.order.sub_type());
-         add_discrete_values(fs.sides, o => o.order.side());
-         add_discrete_values(fs.statuses, o => o.order.status());
-         add_discrete_values(fs.symbols, o => o.security?.Symbol);
-         // numeric
-         add_numeric(fs.qty, o => o.order.quantity());
-         add_numeric(fs.price, o => o.order.price());
-         add_numeric(fs.qty_filled, o => o.order.filled());
-         add_numeric(fs.avg_price, o => o.order.avg_price());
-         add_numeric(fs.last_price, o => o.order.last_price());
-         return predicates.Count == 0 ? null : new Func<OrderSecurityAlgoMeta, bool>(o => predicates.All(p => p(o)));
-         // local methods (impl)
-         void add_regex(string str, Func<OrderSecurityAlgoMeta, string> selector) {
-            var regex = RegexFilterUtils.build_regex(str);
-            if (regex == null)
-               return;
-            predicates.Add(impl);
-            bool impl(OrderSecurityAlgoMeta o) => regex.IsMatch(selector(o) ?? string.Empty);
-         }
-         void add_time_filter(TimeFilterTuple t, Func<OrderSecurityAlgoMeta, DateTime> selector) {
-            if (!t.is_active)
-               return;
-            var dt_pred = TimeFilterUtils.build_predicate(t);
-            predicates.Add(impl);
-            bool impl(OrderSecurityAlgoMeta o) => dt_pred(selector(o));
-         }
-         void add_discrete_values<T>(T[] values, Func<OrderSecurityAlgoMeta, T> selector) {
-            if (values.is_null_or_empty())
-               return;
-            if (values.Length < 16) {
-               predicates.Add(impl);
-               bool impl(OrderSecurityAlgoMeta o) => values.Contains(selector(o));
-            } else {
-               var set = new HashSet<T>(values);
-               predicates.Add(impl);
-               bool impl(OrderSecurityAlgoMeta o) => set.Contains(selector(o));
-            }
-         }
-         void add_numeric<T>(IMinMaxState<T> value, Func<OrderSecurityAlgoMeta, T> selector) where T : struct, IComparable<T> {
-            if (value == null)
-               return;
-            if (value.minimum.active) {
-               var min = value.minimum.value.Value;
-               if (value.maximum.active) {
-                  var max = value.maximum.value.Value;
-                  predicates.Add(impl);
-                  bool impl(OrderSecurityAlgoMeta o) {
-                     var v = selector(o);
-                     return min.CompareTo(v) <= 0 && max.CompareTo(v) >= 0;
-                  }
-               } else {
-                  predicates.Add(impl);
-                  bool impl(OrderSecurityAlgoMeta o) => min.CompareTo(selector(o)) <= 0;
-               }
-            } else if (value.maximum.active) {
-               var max = value.maximum.value.Value;
-               predicates.Add(impl);
-               bool impl(OrderSecurityAlgoMeta o) => max.CompareTo(selector(o)) >= 0;
-            }
-         }
-      }
-   }
-}
+using bts.api;
+using bts.api.orderman;
+using bts.utils;
+using mbts;
+using mbts.spark;
+using mbts.spark.filters;
+using mbts.ui;
+using mbts.ui.utility;
+using ProtoBuf;
+using System;
+
+namespace bts.shell.orderbook {
+   [ProtoContract]
+   class FilterStates : IEquatable<FilterStates> {
+      [ProtoMember(1)]
+      public SecurityCriteria security_criteria;
+      [ProtoMember(2)]
+      public string order_key_regex;
+      [ProtoMember(3)]
+      public TimeFilterTuple time_created;
+      [ProtoMember(4)]
+      public string[] users;
+      [ProtoMember(5)]
+      public string[] accounts;
+      [ProtoMember(6)]
+      public Venue[] exchanges;
+      [ProtoMember(7)]
+      public TimeInForce[] tifs;
+      //[ProtoMember(8)]
+      //public CustomOrderDefinition.CustomOneofCase[] order_types;
+      [ProtoMember(23)]
+      public AlgoID[] order_types;
+      [ProtoMember(24)]
+      public AlgoID[] root_algo_types;
+      [ProtoMember(9)]
+      public Side[] sides;
+      [ProtoMember(10)]
+      public UIntMinMaxState qty;
+      [ProtoMember(11)]
+      public DoubleMinMaxState price;
+      [ProtoMember(12)]
+      public UIntMinMaxState qty_filled;
+      [ProtoMember(13)]
+      public DoubleMinMaxState avg_price;
+      [ProtoMember(14)]
+      public DoubleMinMaxState last_price;
+      [ProtoMember(15)]
+      public OrderStatus[] statuses;
+      [ProtoMember(16)]
+      public string exchange_message_regex;
+      [ProtoMember(17)]
+      public TimeFilterTuple last_change;
+      //[ProtoMember(18)]
+      //public string security_regex;
+      [ProtoMember(19)]
+      public api.orderman.OrderSubType[] order_sub_types;
+      [ProtoMember(20)]
+      public string[] symbols;
+      [ProtoMember(21)]
+      public string parent_key_regex;
+      [ProtoMember(22)]
+      public string attached_target_order_key_regex;
+      [ProtoMember(25)]
+      public UIntMinMaxState piq;
+
+      public bool Equals(FilterStates other) =>
+         other != null &&
+         security_criteria.safe_equals(other.security_criteria) &&
+         order_key_regex == other.order_key_regex &&
+         parent_key_regex == other.parent_key_regex &&
+         attached_target_order_key_regex == other.attached_target_order_key_regex &&
+         time_created.Equals(other.time_created) &&
+         EqualityComparer.safe_sequence_equals(users, other.users) &&
+         EqualityComparer.safe_sequence_equals(accounts, other.accounts) &&
+         EqualityComparer.safe_sequence_equals(exchanges, other.exchanges) &&
+         EqualityComparer.safe_sequence_equals(tifs, other.tifs) &&
+         EqualityComparer.safe_sequence_equals(order_types, other.order_types) &&
+         EqualityComparer.safe_sequence_equals(root_algo_types, other.root_algo_types) &&
+         EqualityComparer.safe_sequence_equals(sides, other.sides) &&
+         qty.safe_equals(other.qty) &&
+         price.safe_equals(other.price) &&
+         qty_filled.safe_equals(other.qty_filled) &&
+         avg_price.safe_equals(other.avg_price) &&
+         last_price.safe_equals(other.last_price) &&
+         EqualityComparer.safe_sequence_equals(statuses, other.statuses) &&
+         exchange_message_regex == other.exchange_message_regex &&
+         last_change.Equals(other.last_change) &&
+         EqualityComparer.safe_sequence_equals(order_sub_types, other.order_sub_types) &&
+         EqualityComparer.safe_sequence_equals(symbols, other.symbols) &&
+         piq.safe_equals(other.piq);
+
+      public override bool Equals(object obj) => Equals(obj as FilterStates);
+
+      public override int GetHashCode() =>
+         EqualityComparer.aggregate_hash(
+            security_criteria?.GetHashCode() ?? 0,
+            order_key_regex?.GetHashCode() ?? 0,
+            parent_key_regex?.GetHashCode() ?? 0,
+            attached_target_order_key_regex?.GetHashCode() ?? 0,
+            time_created.GetHashCode(),
+            EqualityComparer.safe_aggregate_hash(users),
+            EqualityComparer.safe_aggregate_hash(accounts),
+            EqualityComparer.safe_aggregate_hash(exchanges),
+            EqualityComparer.safe_aggregate_hash(tifs),
+            EqualityComparer.safe_aggregate_hash(order_types),
+            EqualityComparer.safe_aggregate_hash(root_algo_types),
+            EqualityComparer.safe_aggregate_hash(sides),
+            qty?.GetHashCode() ?? 0,
+            price?.GetHashCode() ?? 0,
+            qty_filled?.GetHashCode() ?? 0,
+            avg_price?.GetHashCode() ?? 0,
+            last_price?.GetHashCode() ?? 0,
+            EqualityComparer.safe_aggregate_hash(statuses),
+            exchange_message_regex?.GetHashCode() ?? 0,
+            last_change.GetHashCode(),
+            EqualityComparer.safe_aggregate_hash(order_sub_types),
+            EqualityComparer.safe_aggregate_hash(symbols),
+            piq?.GetHashCode() ?? 0);
+   }
+
+   static class FilterStatesExtensions {
+      public static Func<OrderSecurity, bool> build_predicate(this FilterStates fs, IMaskIndexInt32<string> dynamic_type_index) {
+         var pb = new ColumnPredicateBuilder<OrderSecurity>();
+         // security
+         pb.add_security_criteria(fs.security_criteria, o => o.security);
+         // regex
+         pb.add_regex(fs.order_key_regex, o => o.order.Key.ToString());
+         pb.add_regex(fs.exchange_message_regex, o => o.order.State.LastMsg);
+         pb.add_regex(fs.attached_target_order_key_regex, o => o.order.attached_target_order_key().ToString());
+         pb.add_regex(fs.parent_key_regex, o => o.order.ParentKey.ToString());
+         // time
+         pb.add_time_filter(fs.time_created, o => o.order.created());
+         pb.add_time_filter(fs.last_change, o => o.order.last_change());
+         // discrete values
+         pb.add_discrete_values(fs.users, o => o.order.user());
+         pb.add_discrete_values(fs.accounts, o => o.order.account());
+         pb.add_discrete_values(fs.exchanges, o => o.security?.Exchange ?? Venue.Unset);
+         pb.add_discrete_values(fs.tifs, o => o.order.time_in_force());
+         pb.add_discrete_values(fs.order_types, o => AlgoID.from_custom_def(o.order.Def.CustomDef));
+         pb.add_discrete_values(fs.root_algo_types, o => AlgoID.from_algo_key(o.root_algo.key, dynamic_type_index));
+         pb.add_discrete_values(fs.order_sub_types, o => o.order.sub_type());
+         pb.add_discrete_values(fs.sides, o => o.order.side());
+         pb.add_discrete_values(fs.statuses, o => o.order.status());
+         pb.add_discrete_values(fs.symbols, o => o.security?.Symbol);
+         // numeric
+         pb.add_numeric(fs.qty, o => o.order.quantity());
+         pb.add_numeric(fs.price, o => o.order.price());
+         pb.add_numeric(fs.qty_filled, o => o.order.filled());
+         pb.add_numeric(fs.avg_price, o => o.order.avg_price());
+         pb.add_numeric(fs.last_price, o => o.order.last_price());
+         pb.add_numeric(fs.piq, o => o.piq ?? uint.MaxValue);
+         return pb.to_predicate();
+      }
+   }
+}
@@ -43,7 +43,9 @@ namespace bts.shell.orderbook {
      IEnumerable<IPredicateAnimationsData<OrderSecurity, OrderRecordTuplePredicate>> IGridSettingsWithNotifications<OrderSecurity, OrderRecordTuplePredicate>.predicate_animations => predicate_animations;

      public OrderBookGridSettings with(GridSettings general) =>
-         new OrderBookGridSettings(general ?? this.general, predicate_animations);
+         new OrderBookGridSettings(general ?? this.general, predicate_animations) {
+            algo_tree_display_mode = algo_tree_display_mode
+         };

      public bool Equals(OrderBookGridSettings other) =>
         other != null &&
@@ -14,16 +14,12 @@ using Columns = mbts.spark.OrderBookGridView.ColumnKeys;

 namespace bts.shell.orderbook {
   class OrderBookGridSettingsManager : IDisposable, IObserver<OrderBookGridSettings> {
+      public static readonly IReadOnlyDictionary<string, GridColumnSettingsFeatureFlags> hard_column_flags;
+
      readonly IObserver<OrderBookGridSettings> _core_man_as_observer;
      AlgoTreeDisplayMode _algo_tree_display_mode;

-      public OrderBookGridSettingsManager(
-         IObservable<string> owner_title,
-         IBus bus,
-         INotificationService notification_service,
-         OrdersModel model,
-         IEnumerable<OrderBookRowVM> rows,
-         ObservableCollection<DIYGrid.ColumnBase> columns) {
+      static OrderBookGridSettingsManager() {
         // make font-weight immutable for all columns (the font-weight rule is hard-coded: Regular for root-orders, Light for all others)
         // TODO: Remove the immutable font-weight flags when cell animation is ready
         var col_settings_flags = EnumHelper.get_values<Columns>().ToDictionary(
@@ -31,10 +27,20 @@ namespace bts.shell.orderbook {
         // make font-color immutable for Side, Size, and Filled columns (the font-color rule is hard-coded: MarketData.bid for Buy orders, MarketData.ask for Sells)
         // TODO: Remove the immutable font-color flags when cell animation is ready
         foreach (var c in new[] { Columns.Side, Columns.Size, Columns.Filled }) {
-            col_settings_flags[c.ToString()] = GridColumnSettingsFeatureFlags.ImmutableFontColor | GridColumnSettingsFeatureFlags.ImmutableFontWeight;
+            col_settings_flags[c.ToString()] |= GridColumnSettingsFeatureFlags.ImmutableFontWeight;
         }
+         col_settings_flags[Columns.Commit.ToString()] |= GridColumnSettingsFeatureFlags.ImmutableHeader;
+         hard_column_flags = col_settings_flags;
+      }
+
+      public OrderBookGridSettingsManager(
+         IBus bus,
+         INotificationService notification_service,
+         OrdersModel model,
+         IEnumerable<OrderBookRowVM> rows,
+         ObservableCollection<DIYGrid.ColumnBase> columns) {
         core_manager = new GridSettingsManager<OrderBookRowVM, OrderSecurity, OrderRecordTuplePredicate, OrderBookGridSettings>(
-            owner_title, bus, model, rows, columns,
+            bus, model, rows, columns,
            () => new OrderRecordTuplePredicate(),
            () => {
               var pvm = PredicateVMWrapper.create<OrderSecurity, OrderRecordTuplePredicate, OrderRecordTuplePredicate.PredicateTypeOneofCase>(
@@ -53,7 +59,7 @@ namespace bts.shell.orderbook {
            p => p.create_notification_predicate(notification_service.data_cache),
            notification_service == null ? new Func<IPredicate<OrderSecurity>, SoundNotification, IDisposable>((p, sn) => Disposable.empty) : notification_service.link_to_order,
            notification_service == null ? new Func<INotificationPredicate<OrderSecurity>, IDisposable>(t => Disposable.empty) : notification_service.link_to_order,
-            col_settings_flags);
+            hard_column_flags);
         _core_man_as_observer = core_manager;
      }

@@ -83,8 +89,8 @@ namespace bts.shell.orderbook {
         return gs;
      }

-      public OrderBookSettingsVM create_vm(OrderBookGridSettings gs, IObservable<string> owner_title) =>
-         new OrderBookSettingsVM(core_manager.create_vm(gs.general, owner_title)) {
+      public OrderBookSettingsVM create_vm(OrderBookGridSettings gs) =>
+         new OrderBookSettingsVM(core_manager.create_vm(gs.general)) {
            algo_tree_display_mode = gs.algo_tree_display_mode
         };

@@ -1,209 +1,244 @@
-using bts.api.orderman;
-using mbts;
-using mbts.ui;
-using mbts.ui.controls;
-using mbts.ui.settings;
-using ProtoBuf;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Reactive.Linq;
-using System.Windows;
-using Columns = mbts.spark.OrderBookGridView.ColumnKeys;
-using GridSettings = mbts.ui.settings.GridSettings;
-
-namespace bts.shell.orderbook {
-   [ProtoContract]
-   class OrderBookStartupData {
-      const bool
-         _default_show_right_panel = true,
-         _default_show_order_params = true;
-      const double
-         _default_right_panel_width = 400,
-         _default_order_params_height = 250,
-         _default_fills_height = 300,
-         _default_ladder_height = 350;
-      [ProtoMember(16)]
-      OrderBookRightPanelSettings _right_panel;
-      // ALREADY USED TAGS
-      // [ProtoMember(5)]
-      // public readonly List<SortingCriteria> sort_criteria;
-
-      public OrderBookRightPanelSettings right_panel => _right_panel ?? (_right_panel = new OrderBookRightPanelSettings());
-      /// TODO: remove properties below, and redirect callers to <see cref="right_panel"/>
-      // right panel (host)
-      public bool show_right_panel { get => right_panel.show; set => right_panel.show = value; }
-      public double right_panel_width { get => right_panel.width; set => right_panel.width = value; }
-      // order params
-      public bool show_order_params { get => right_panel.stack.show_order_params; set => right_panel.stack.show_order_params = value; }
-      public double order_params_height { get; set; }
-      // ladder
-      public bool show_ladder { get; set; }
-      public double ladder_height { get => right_panel.stack.ladder_height; set => right_panel.stack.ladder_height = value; }
-      // fills
-      public bool show_fills { get => right_panel.stack.show_fills; set => right_panel.stack.show_fills = value; }
-      public double fills_height { get => right_panel.stack.fills_height; set => right_panel.stack.fills_height = value; }
-
-      // filters
-      [ProtoMember(10)]
-      public FilterStates filters;
-      // grid
-      [ProtoMember(15)]
-      [Obsolete]
-      public GridSettings grid { get; set; }
-      // orderbook grid
-      [ProtoMember(17)]
-      public OrderBookGridSettings orderbook_grid { get; set; }
-      // fills settings
-      [ProtoMember(26)]
-      public OrderBookFillsGridSettings fills_settings { get; set; }
-      // predicate animations
-      [ProtoMember(20)]
-      [Obsolete]
-      List<OrderRecordTuplePredicateAnimations> _predicate_animations;
-      // use defaults
-      [ProtoMember(25)]
-      public bool use_defaults;
-
-      public OrderBookStartupData() {
-         show_right_panel = _default_show_right_panel;
-         show_order_params = _default_show_order_params;
-         right_panel_width = _default_right_panel_width;
-         order_params_height = _default_order_params_height;
-         fills_height = _default_fills_height;
-         ladder_height = _default_ladder_height;
-      }
-
-      public OrderBookStartupData(FilterStates filters, OrderBookGridSettings orderbook_grid = default, bool show_right_panel = false, double right_panel_width = 0, double fills_height = 0, bool show_fills = false, bool use_defaults = false) {
-         this.filters = filters;
-         this.use_defaults = use_defaults;
-         this.show_right_panel = show_right_panel;
-         this.right_panel_width = right_panel_width;
-         this.fills_height = fills_height;
-         this.show_fills = show_fills;
-         this.orderbook_grid = orderbook_grid;
-#pragma warning disable CS0612 // Type or member is obsolete
-         _predicate_animations = new List<OrderRecordTuplePredicateAnimations>();
-         if (predicate_animations != null)
-            _predicate_animations.AddRange(predicate_animations);
-#pragma warning restore CS0612 // Type or member is obsolete
-      }
-
-#pragma warning disable CS0612 // Type or member is obsolete
-      [Obsolete]
-      public IReadOnlyList<OrderRecordTuplePredicateAnimations> predicate_animations => _predicate_animations ?? (_predicate_animations = new List<OrderRecordTuplePredicateAnimations>());
-      public OrderBookGridSettings grid_settings_wrapper() {
-         if (use_defaults)
-            return null;
-         if (orderbook_grid == null)
-            orderbook_grid = new OrderBookGridSettings(grid.clone(), _predicate_animations);
-         return orderbook_grid;
-      }
-#pragma warning restore CS0612 // Type or member is obsolete
-
-      public static OrderBookStartupData Default =>
-        new OrderBookStartupData(
-           new FilterStates { statuses = new[] { OrderStatus.Working } },
-           DefaultGrid,
-           _default_show_right_panel,
-           _default_right_panel_width,
-           _default_fills_height,
-           use_defaults: true) {
-           show_order_params = _default_show_order_params,
-           order_params_height = _default_order_params_height,
-           fills_settings = DefaultFillsGrid
-        };
-
-      public static OrderBookGridSettings DefaultGrid => new OrderBookGridSettings(_default_general_grid) {
-         algo_tree_display_mode = AlgoTreeDisplayMode.RootAndLeafNodes
-      };
-
-      public static OrderBookFillsGridSettings DefaultFillsGrid {
-         get {
-            var default_fills = FillsWindowFactory.StartupData.Default();
-            var rv = new OrderBookFillsGridSettings {
-               sorting_criterion = default_fills.sorting_criterion.ToList(),
-               filters = default_fills.filters,
-               general = FillsWindowFactory.StartupData.MiniGridSettings
-            };
-            return rv;
-         }
-      }
-      static GridSettings _default_general_grid => GridSettings.Default.with(DefaultColumns.all, DefaultColumns.sorting_criterion);
-      public static OrderBookGridSettings default_mini_grid => new OrderBookGridSettings(GridSettings.Default.with(DefaultColumns.mini, DefaultColumns.sorting_criterion));
-
-      static class DefaultColumns {
-         public static GridColumnSettings security => new GridColumnSettings(Columns.Security.ToString(), DIYGrid.DefaultColumnHeaders.Security, width: DIYGrid.DefaultColumnWidths.Security);
-         public static GridColumnSettings symbol => new GridColumnSettings(Columns.Symbol.ToString(), DIYGrid.DefaultColumnHeaders.Symbol, width: DIYGrid.DefaultColumnWidths.Symbol, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings time_created => new GridColumnSettings(Columns.Time.ToString(), "Time", width: DIYGrid.DefaultColumnWidths.Time, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings last_change => new GridColumnSettings(Columns.LastChange.ToString(), "Last Change", width: DIYGrid.DefaultColumnWidths.Time, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings user => new GridColumnSettings(Columns.User.ToString(), DIYGrid.DefaultColumnHeaders.User, width: DIYGrid.DefaultColumnWidths.User, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings account => new GridColumnSettings(Columns.Account.ToString(), DIYGrid.DefaultColumnHeaders.Account, width: DIYGrid.DefaultColumnWidths.Account, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings exchange => new GridColumnSettings(Columns.Exchange.ToString(), DIYGrid.DefaultColumnHeaders.Exchange, width: DIYGrid.DefaultColumnWidths.Exchange, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings time_in_force => new GridColumnSettings(Columns.TimeInForce.ToString(), DIYGrid.DefaultColumnHeaders.TimeInForce, width: DIYGrid.DefaultColumnWidths.TimeInForce);
-         public static GridColumnSettings order_type => new GridColumnSettings(Columns.OrderType.ToString(), DIYGrid.DefaultColumnHeaders.OrderType, width: DIYGrid.DefaultColumnWidths.OrderType);
-         public static GridColumnSettings sub_type => new GridColumnSettings(Columns.SubType.ToString(), "Sub Type", width: 80, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings side => new GridColumnSettings(Columns.Side.ToString(), "B/S", width: DIYGrid.DefaultColumnWidths.Side, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings quantity => new GridColumnSettings(Columns.Size.ToString(), "Qty", width: DIYGrid.DefaultColumnWidths.Size, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings price => new GridColumnSettings(Columns.Price.ToString(), DIYGrid.DefaultColumnHeaders.Price, width: DIYGrid.DefaultColumnWidths.Price, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings filled_quantity => new GridColumnSettings(Columns.Filled.ToString(), "Filled Qty", width: DIYGrid.DefaultColumnWidths.Filled, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings avg_price => new GridColumnSettings(Columns.AvgFilled.ToString(), "Avg Filled", width: DIYGrid.DefaultColumnWidths.AveragePrice, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings last_price => new GridColumnSettings(Columns.LastPrice.ToString(), "Last Filled", width: DIYGrid.DefaultColumnWidths.LastPrice, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings status => new GridColumnSettings(Columns.Status.ToString(), "Status", width: 80, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings last_message => new GridColumnSettings(Columns.LastMessage.ToString(), "Last Message", width: DIYGrid.DefaultColumnWidths.LastMessage, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings security_key => new GridColumnSettings(Columns.SecurityKey.ToString(), DIYGrid.DefaultColumnHeaders.SecurityKey, is_visible: false, width: DIYGrid.DefaultColumnWidths.SecurityKey, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings order_key => new GridColumnSettings(Columns.OrderKey.ToString(), DIYGrid.DefaultColumnHeaders.OrderKey, width: DIYGrid.DefaultColumnWidths.OrderKey, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings parent_key => new GridColumnSettings(Columns.ParentKey.ToString(), "Parent Key", width: DIYGrid.DefaultColumnWidths.ParentKey, horizontal_alignment: HorizontalAlignment.Right);
-         public static GridColumnSettings attached_target_order_key => new GridColumnSettings(Columns.AttachedTargetOrderKey.ToString(), DIYGrid.DefaultColumnHeaders.AttachedTargetOrderKey, width: DIYGrid.DefaultColumnWidths.ParentKey, horizontal_alignment: HorizontalAlignment.Right);
-
-         public static IEnumerable<SortingCriteria> sorting_criterion {
-            get {
-               yield return new SortingCriteria(time_created.id, false);
-            }
-         }
-
-         public static IEnumerable<GridColumnSettings> all {
-            get {
-               yield return security;
-               yield return symbol;
-               yield return time_created;
-               yield return last_change;
-               yield return user;
-               yield return account;
-               yield return exchange;
-               yield return time_in_force;
-               yield return order_type;
-               yield return sub_type;
-               yield return side;
-               yield return quantity;
-               yield return price;
-               yield return filled_quantity;
-               yield return avg_price;
-               yield return last_price;
-               yield return status;
-               yield return last_message;
-               yield return security_key;
-               yield return order_key;
-               yield return parent_key;
-               yield return attached_target_order_key;
-            }
-         }
-
-         private static HashSet<GridColumnSettings> _mini_mode_columns_to_hide = new HashSet<GridColumnSettings> {
-               symbol, last_change, exchange, sub_type, quantity, price, avg_price, last_price, status, last_message, security_key, order_key, parent_key, attached_target_order_key
-            };
-
-         public static IEnumerable<GridColumnSettings> mini {
-            get {
-               foreach (var col_setting in all) {
-                  if (_mini_mode_columns_to_hide.Contains(col_setting)) {
-                     yield return col_setting.with(is_visible: false);
-                  } else {
-                     yield return col_setting;
-                  }
-               }
-            }
-         }
-      }
-   }
+using bts.api.orderman;
+using bts.shell.fills;
+using mbts;
+using mbts.ui;
+using mbts.ui.controls;
+using mbts.ui.settings;
+using ProtoBuf;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reactive.Linq;
+using System.Windows;
+using Columns = mbts.spark.OrderBookGridView.ColumnKeys;
+using GridSettings = mbts.ui.settings.GridSettings;
+
+namespace bts.shell.orderbook {
+   [ProtoContract]
+   class OrderBookStartupData {
+      const bool
+         _default_show_right_panel = true,
+         _default_show_order_params = true;
+      const double
+         _default_right_panel_width = 400,
+         _default_order_params_height = 250,
+         _default_fills_height = 300,
+         _default_ladder_height = 350;
+      [ProtoMember(16)]
+      OrderBookRightPanelSettings _right_panel;
+      // ALREADY USED TAGS
+      // [ProtoMember(5)]
+      // public readonly List<SortingCriteria> sort_criteria;
+
+      public OrderBookRightPanelSettings right_panel => _right_panel ?? (_right_panel = new OrderBookRightPanelSettings());
+      /// TODO: remove properties below, and redirect callers to <see cref="right_panel"/>
+      // right panel (host)
+      public bool show_right_panel { get => right_panel.show; set => right_panel.show = value; }
+      public double right_panel_width { get => right_panel.width; set => right_panel.width = value; }
+      // order params
+      public bool show_order_params { get => right_panel.stack.show_order_params; set => right_panel.stack.show_order_params = value; }
+      public double order_params_height { get; set; }
+      // ladder
+      public bool show_ladder { get; set; }
+      public double ladder_height { get => right_panel.stack.ladder_height; set => right_panel.stack.ladder_height = value; }
+      // fills
+      public bool show_fills { get => right_panel.stack.show_fills; set => right_panel.stack.show_fills = value; }
+      public double fills_height { get => right_panel.stack.fills_height; set => right_panel.stack.fills_height = value; }
+
+      // filters
+      [ProtoMember(10)]
+      public FilterStates filters;
+      // grid
+      [ProtoMember(15)]
+      [Obsolete]
+      public GridSettings grid { get; set; }
+      // orderbook grid
+      [ProtoMember(17)]
+      public OrderBookGridSettings orderbook_grid { get; set; }
+      // fills settings
+      [ProtoMember(26)]
+      public OrderBookFillsGridSettings fills_settings { get; set; }
+      // predicate animations
+      [ProtoMember(20)]
+      [Obsolete]
+      List<OrderRecordTuplePredicateAnimations> _predicate_animations;
+      // use defaults
+      [ProtoMember(25)]
+      public bool use_defaults;
+
+      /// <summary>
+      /// Please use <see cref="Default"/> to get a new instance (the only reason the default constructor still exists is for ProtoBuf deserialization).
+      /// </summary>
+      [Obsolete]
+      public OrderBookStartupData() {
+         show_right_panel = _default_show_right_panel;
+         show_order_params = _default_show_order_params;
+         right_panel_width = _default_right_panel_width;
+         order_params_height = _default_order_params_height;
+         fills_height = _default_fills_height;
+         ladder_height = _default_ladder_height;
+      }
+
+      public OrderBookStartupData(FilterStates filters, OrderBookGridSettings orderbook_grid = default, bool show_right_panel = false, double right_panel_width = 0, double fills_height = 0, bool show_fills = false, bool use_defaults = false) {
+         this.filters = filters;
+         this.use_defaults = use_defaults;
+         this.show_right_panel = show_right_panel;
+         this.right_panel_width = right_panel_width;
+         this.fills_height = fills_height;
+         this.show_fills = show_fills;
+         this.orderbook_grid = orderbook_grid;
+#pragma warning disable CS0612 // Type or member is obsolete
+         _predicate_animations = new List<OrderRecordTuplePredicateAnimations>();
+         if (predicate_animations != null)
+            _predicate_animations.AddRange(predicate_animations);
+#pragma warning restore CS0612 // Type or member is obsolete
+      }
+
+#pragma warning disable CS0612 // Type or member is obsolete
+      [Obsolete]
+      public IReadOnlyList<OrderRecordTuplePredicateAnimations> predicate_animations => _predicate_animations ?? (_predicate_animations = new List<OrderRecordTuplePredicateAnimations>());
+      public OrderBookGridSettings grid_settings_wrapper() {
+         if (use_defaults)
+            return null;
+         if (orderbook_grid == null) {
+            if (grid == null)
+               grid = _default_general_grid;
+            orderbook_grid =  new OrderBookGridSettings(grid.clone(), _predicate_animations);
+         }
+         return orderbook_grid;
+      }
+#pragma warning restore CS0612 // Type or member is obsolete
+
+      public static OrderBookStartupData Default =>
+        new OrderBookStartupData(
+           new FilterStates { statuses = new[] { OrderStatus.Working } },
+           DefaultGrid,
+           _default_show_right_panel,
+           _default_right_panel_width,
+           _default_fills_height,
+           use_defaults: true) {
+           show_order_params = _default_show_order_params,
+           order_params_height = _default_order_params_height,
+           fills_settings = DefaultFillsGrid
+        };
+
+      public static OrderBookGridSettings DefaultGrid => new OrderBookGridSettings(_default_general_grid) {
+         algo_tree_display_mode = AlgoTreeDisplayMode.RootAndLeafNodes
+      };
+
+      public static OrderBookFillsGridSettings DefaultFillsGrid {
+         get {
+            var default_fills = FillsSettings.Default();
+            var rv = new OrderBookFillsGridSettings {
+               sorting_criterion = default_fills.sorting_criterion.ToList(),
+               filters = default_fills.filters,
+               general = FillsSettings.MiniGridSettings
+            };
+            return rv;
+         }
+      }
+      static GridSettings _default_general_grid => GridSettings.Default.with(DefaultColumns.standard, DefaultColumns.sorting_criterion);
+      public static OrderBookGridSettings default_mini_grid => new OrderBookGridSettings(GridSettings.Default.with(DefaultColumns.mini, DefaultColumns.sorting_criterion)) {
+         algo_tree_display_mode = AlgoTreeDisplayMode.RootAndLeafNodes
+      };
+
+      static class DefaultColumns {
+         // standard
+         public static GridColumnSettings security => new GridColumnSettings(Columns.Security.ToString(), DIYGrid.DefaultColumnHeaders.Security, width: DIYGrid.DefaultColumnWidths.Security);
+         public static GridColumnSettings symbol => new GridColumnSettings(Columns.Symbol.ToString(), DIYGrid.DefaultColumnHeaders.Symbol, width: DIYGrid.DefaultColumnWidths.Symbol, horizontal_alignment: HorizontalAlignment.Left);
+         public static GridColumnSettings time_created => new GridColumnSettings(Columns.Time.ToString(), "Time", width: DIYGrid.DefaultColumnWidths.Time, horizontal_alignment: HorizontalAlignment.Left);
+         public static GridColumnSettings last_change => new GridColumnSettings(Columns.LastChange.ToString(), "Last Change", width: DIYGrid.DefaultColumnWidths.Time, horizontal_alignment: HorizontalAlignment.Left);
+         public static GridColumnSettings user => new GridColumnSettings(Columns.User.ToString(), DIYGrid.DefaultColumnHeaders.User, width: DIYGrid.DefaultColumnWidths.User, horizontal_alignment: HorizontalAlignment.Left);
+         public static GridColumnSettings account => new GridColumnSettings(Columns.Account.ToString(), DIYGrid.DefaultColumnHeaders.Account, width: DIYGrid.DefaultColumnWidths.Account, horizontal_alignment: HorizontalAlignment.Left);
+         public static GridColumnSettings exchange => new GridColumnSettings(Columns.Exchange.ToString(), DIYGrid.DefaultColumnHeaders.Exchange, width: DIYGrid.DefaultColumnWidths.Exchange, horizontal_alignment: HorizontalAlignment.Left);
+         public static GridColumnSettings time_in_force => new GridColumnSettings(Columns.TimeInForce.ToString(), DIYGrid.DefaultColumnHeaders.TimeInForce, width: DIYGrid.DefaultColumnWidths.TimeInForce);
+         public static GridColumnSettings order_type => new GridColumnSettings(Columns.OrderType.ToString(), DIYGrid.DefaultColumnHeaders.OrderType, width: DIYGrid.DefaultColumnWidths.OrderType);
+         public static GridColumnSettings root_algo_type => new GridColumnSettings(Columns.RootAlgoType.ToString(), DIYGrid.DefaultColumnHeaders.RootAlgoType, width: DIYGrid.DefaultColumnWidths.OrderType);
+         public static GridColumnSettings sub_type => new GridColumnSettings(Columns.SubType.ToString(), "Sub Type", width: 80, horizontal_alignment: HorizontalAlignment.Left);
+         public static GridColumnSettings side => new GridColumnSettings(Columns.Side.ToString(), "B/S", width: DIYGrid.DefaultColumnWidths.Side, horizontal_alignment: HorizontalAlignment.Left);
+         public static GridColumnSettings quantity => new GridColumnSettings(Columns.Size.ToString(), "Qty", width: DIYGrid.DefaultColumnWidths.Size, horizontal_alignment: HorizontalAlignment.Right);
+         public static GridColumnSettings price => new GridColumnSettings(Columns.Price.ToString(), DIYGrid.DefaultColumnHeaders.Price, width: DIYGrid.DefaultColumnWidths.Price, horizontal_alignment: HorizontalAlignment.Right);
+         public static GridColumnSettings filled_quantity => new GridColumnSettings(Columns.Filled.ToString(), "Filled Qty", width: DIYGrid.DefaultColumnWidths.Filled, horizontal_alignment: HorizontalAlignment.Right);
+         public static GridColumnSettings avg_price => new GridColumnSettings(Columns.AvgFilled.ToString(), "Avg Filled", width: DIYGrid.DefaultColumnWidths.AveragePrice, horizontal_alignment: HorizontalAlignment.Right);
+         public static GridColumnSettings last_price => new GridColumnSettings(Columns.LastPrice.ToString(), "Last Filled", width: DIYGrid.DefaultColumnWidths.LastPrice, horizontal_alignment: HorizontalAlignment.Right);
+         public static GridColumnSettings status => new GridColumnSettings(Columns.Status.ToString(), "Status", width: 80, horizontal_alignment: HorizontalAlignment.Left);
+         public static GridColumnSettings last_message => new GridColumnSettings(Columns.LastMessage.ToString(), "Last Message", width: DIYGrid.DefaultColumnWidths.LastMessage, horizontal_alignment: HorizontalAlignment.Left);
+         public static GridColumnSettings security_key => new GridColumnSettings(Columns.SecurityKey.ToString(), DIYGrid.DefaultColumnHeaders.SecurityKey, is_visible: false, width: DIYGrid.DefaultColumnWidths.SecurityKey, horizontal_alignment: HorizontalAlignment.Left);
+         public static GridColumnSettings order_key => new GridColumnSettings(Columns.OrderKey.ToString(), DIYGrid.DefaultColumnHeaders.OrderKey, width: DIYGrid.DefaultColumnWidths.OrderKey, horizontal_alignment: HorizontalAlignment.Left);
+         public static GridColumnSettings parent_key => new GridColumnSettings(Columns.ParentKey.ToString(), "Parent Key", width: DIYGrid.DefaultColumnWidths.ParentKey, horizontal_alignment: HorizontalAlignment.Left);
+         public static GridColumnSettings attached_target_order_key => new GridColumnSettings(Columns.AttachedTargetOrderKey.ToString(), DIYGrid.DefaultColumnHeaders.AttachedTargetOrderKey, width: DIYGrid.DefaultColumnWidths.ParentKey, horizontal_alignment: HorizontalAlignment.Left);
+         public static GridColumnSettings piq => new GridColumnSettings(Columns.Piq.ToString(), "PIQ", width: DIYGrid.DefaultColumnWidths.Size, horizontal_alignment: HorizontalAlignment.Right);
+         // editable
+         public static GridColumnSettings cancel => new GridColumnSettings(Columns.Cancel.ToString(), DIYGrid.DefaultColumnHeaders.Cancel, width: DIYGrid.DefaultColumnWidths.MiniOrderBook.Cancel);
+         public static GridColumnSettings attach_detach => new GridColumnSettings(Columns.Attach.ToString(), DIYGrid.DefaultColumnHeaders.AttachDetach, width: DIYGrid.DefaultColumnWidths.MiniOrderBook.AttachDetach);
+         public static GridColumnSettings update => new GridColumnSettings(Columns.Update.ToString(), DIYGrid.DefaultColumnHeaders.Update, width: DIYGrid.DefaultColumnWidths.MiniOrderBook.Update);
+         public static GridColumnSettings edit_quantity => new GridColumnSettings(Columns.EditableQty.ToString(), DIYGrid.DefaultColumnHeaders.Size, width: DIYGrid.DefaultColumnWidths.MiniOrderBook.EditableSize);
+         public static GridColumnSettings edit_price => new GridColumnSettings(Columns.EditablePrice.ToString(), DIYGrid.DefaultColumnHeaders.Price, width: DIYGrid.DefaultColumnWidths.MiniOrderBook.EditablePrice);
+         public static GridColumnSettings commit => new GridColumnSettings(Columns.Commit.ToString(), width: DIYGrid.DefaultColumnWidths.MiniOrderBook.Commit);
+
+         public static IEnumerable<SortingCriteria> sorting_criterion {
+            get {
+               yield return new SortingCriteria(time_created.id, false);
+            }
+         }
+
+         public static IEnumerable<GridColumnSettings> standard {
+            get {
+               yield return security;
+               yield return symbol;
+               yield return time_created;
+               yield return last_change;
+               yield return user;
+               yield return account;
+               yield return exchange;
+               yield return time_in_force;
+               yield return order_type;
+               yield return root_algo_type;
+               yield return sub_type;
+               yield return side;
+               yield return quantity;
+               yield return price;
+               yield return piq;
+               yield return filled_quantity;
+               yield return avg_price;
+               yield return last_price;
+               yield return status;
+               yield return last_message;
+               yield return security_key;
+               yield return order_key;
+               yield return parent_key;
+               yield return attached_target_order_key;
+            }
+         }
+
+         public static IEnumerable<GridColumnSettings> editable {
+            get {
+               yield return cancel;
+               yield return update;
+               yield return edit_quantity;
+               yield return edit_price;
+               yield return commit;
+               yield return attach_detach;
+            }
+         }
+
+         private static HashSet<GridColumnSettings> _mini_mode_columns_to_hide = new HashSet<GridColumnSettings> {
+               symbol, last_change, exchange, sub_type, quantity, price, avg_price, last_price, status, last_message, security_key, order_key, parent_key, attached_target_order_key
+            };
+
+         public static IEnumerable<GridColumnSettings> mini {
+            get {
+               foreach (var col_setting in editable)
+                  yield return col_setting;
+               foreach (var col_setting in standard) {
+                  if (_mini_mode_columns_to_hide.Contains(col_setting)) {
+                     yield return col_setting.with(is_visible: false);
+                  } else {
+                     yield return col_setting;
+                  }
+               }
+            }
+         }
+      }
+   }
 }
@@ -17,7 +17,8 @@ namespace bts.shell.orderbook {
         this.core_settings_vm = core_settings_vm;

      public OrderBookSettingsVM(
-         IObservable<string> owner_title, IBus bus, OrdersModel orders_model,
+         IBus bus,
+         OrdersModel orders_model,
         Func<OrderRecordTuplePredicate> predicate_data_factory,
         Func<OrderRecordTuplePredicate, INotificationPredicate<OrderSecurity>> notification_predicate_factory,
         Func<IPropertyWrapperVM<OrderRecordTuplePredicate>> create_predicate_vm,
@@ -25,7 +26,7 @@ namespace bts.shell.orderbook {
         Func<GridSettings, IEnumerable<IPredicateAnimationsData<OrderSecurity, OrderRecordTuplePredicate>>, OrderBookGridSettings> create_settings_obj,
         IReadOnlyDictionary<string, GridColumnSettingsFeatureFlags> column_flags = null) {
         core_settings_vm = new GridSettingsVM<OrderSecurity, OrderRecordTuplePredicate, OrderBookGridSettings>(
-            owner_title, bus, orders_model, predicate_data_factory, notification_predicate_factory, create_predicate_vm, create_column_predicate_vm, create_settings_obj, column_flags);
+            bus, orders_model, predicate_data_factory, notification_predicate_factory, create_predicate_vm, create_column_predicate_vm, create_settings_obj, column_flags);
      }

      public GridSettingsVM<OrderSecurity, OrderRecordTuplePredicate, OrderBookGridSettings> core_settings_vm { get; }
@@ -4,13 +4,12 @@
  x:Name="_grid"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-  xmlns:order="clr-namespace:bts.api.orderman;assembly=spark_api"
  xmlns:sp="clr-namespace:mbts.spark"
-  xmlns:u="clr-namespace:mbts.ui"
  xmlns:c="clr-namespace:mbts.ui.controls"
  xmlns:usp="clr-namespace:mbts.ui.spark"
  xmlns:uspcv="clr-namespace:mbts.ui.spark.converters"
  xmlns:sys="clr-namespace:System;assembly=mscorlib"
+  InactiveSelectionOpacity="0.3"
 >
  <c:DIYGrid.Resources>
    <ResourceDictionary>
@@ -111,61 +110,7 @@
  </c:DIYGrid.InputBindings>
  <c:DIYGrid.RowStyle>
    <Style TargetType="ListBoxItem" BasedOn="{StaticResource DIYGridRowStyle}">
-      <Style.Triggers>
-        <!-- Completed order background -->
-        <MultiDataTrigger>
-          <MultiDataTrigger.Conditions>
-            <Condition Binding="{Binding IsSelected, RelativeSource={RelativeSource Self}}" Value="False"/>
-            <Condition Binding="{Binding status}" Value="{u:Enum Completed, Type=order:OrderStatus}"/>
-          </MultiDataTrigger.Conditions>
-          <MultiDataTrigger.Setters>
-            <Setter Property="Background" Value="{x:Static Member=completed_order_background_brush, MemberType={u:Nested u:BTSColors.Orders}}"/>
-          </MultiDataTrigger.Setters>
-        </MultiDataTrigger>
-        <!-- Error, RejectedBySpark, Disconnected order background -->
-        <MultiDataTrigger>
-          <MultiDataTrigger.Conditions>
-            <Condition Binding="{Binding IsSelected, RelativeSource={RelativeSource Self}}" Value="False"/>
-            <Condition Binding="{Binding status}" Value="{u:Enum Error, Type=order:OrderStatus}"/>
-          </MultiDataTrigger.Conditions>
-          <MultiDataTrigger.Setters>
-            <Setter Property="Background" Value="{x:Static Member=error_order_background_brush, MemberType={u:Nested u:BTSColors.Orders}}"/>
-          </MultiDataTrigger.Setters>
-        </MultiDataTrigger>
-        <MultiDataTrigger>
-          <MultiDataTrigger.Conditions>
-            <Condition Binding="{Binding IsSelected, RelativeSource={RelativeSource Self}}" Value="False"/>
-            <Condition Binding="{Binding status}" Value="{u:Enum RejectedBySpark, Type=order:OrderStatus}"/>
-          </MultiDataTrigger.Conditions>
-          <MultiDataTrigger.Setters>
-            <Setter Property="Background" Value="{x:Static Member=error_order_background_brush, MemberType={u:Nested u:BTSColors.Orders}}"/>
-          </MultiDataTrigger.Setters>
-        </MultiDataTrigger>
-        <MultiDataTrigger>
-          <MultiDataTrigger.Conditions>
-            <Condition Binding="{Binding IsSelected, RelativeSource={RelativeSource Self}}" Value="False"/>
-            <Condition Binding="{Binding status}" Value="{u:Enum Disconnected, Type=order:OrderStatus}"/>
-          </MultiDataTrigger.Conditions>
-          <MultiDataTrigger.Setters>
-            <Setter Property="Background" Value="{x:Static Member=error_order_background_brush, MemberType={u:Nested u:BTSColors.Orders}}"/>
-          </MultiDataTrigger.Setters>
-        </MultiDataTrigger>
-        <!-- Cancel order background -->
-        <MultiDataTrigger>
-          <MultiDataTrigger.Conditions>
-            <Condition Binding="{Binding IsSelected, RelativeSource={RelativeSource Self}}" Value="False"/>
-            <Condition Binding="{Binding status}" Value="{u:Enum Canceled, Type=order:OrderStatus}"/>
-          </MultiDataTrigger.Conditions>
-          <MultiDataTrigger.Setters>
-            <Setter Property="Background" Value="{x:Static Member=canceled_order_background_brush, MemberType={u:Nested u:BTSColors.Orders}}"/>
-          </MultiDataTrigger.Setters>
-        </MultiDataTrigger>        
-      </Style.Triggers>
+      <Setter Property="IsSelected" Value="{Binding is_selected, Mode=TwoWay}" />
    </Style>
  </c:DIYGrid.RowStyle>
-  <c:DIYGrid.RowTemplate>
-    <DataTemplate>
-      <sp:OrderBookRowView/>
-    </DataTemplate>
-  </c:DIYGrid.RowTemplate>
 </c:DIYGrid>