Merge branch 'master' of bitbucket.org:bluetradesys/spark into ml

Merged in SPARK-2025 (pull request #160 )
RTM - SPARK-2025 Approved-by: John Colvin <john.colvin@bluetradesys.com>
2019-02-11 11:30:08 -05:00 · 2019-02-11 15:01:35 +00:00 · 2019-02-11 09:53:30 -05:00 · 2019-02-11 09:49:19 -05:00 · 2019-02-11 09:46:57 -05:00 · 2019-02-11 14:45:32 +00:00
454 changed files with 13355 additions and 6781 deletions
@@ -28,3 +28,5 @@ src/server/sparkd/orderman/perf_analysis/trace_data/
 *.fsx.lock
 src/lib/orderman/perf_analysis/logs/latency_data/
 trace_data/
+/src/lib/orderman/perf_analysis/last_pretty_log.csv
+/src/lib/orderman/perf_analysis/log.csv
@@ -30,6 +30,7 @@
                "${workspaceRoot}/build/ninja_debug/src",
                "${workspaceRoot}/externals/windows/include",
                "${workspaceRoot}/externals/linux/include",
+                "${workspaceRoot}/externals/linux/include/tensorflow/contrib/makefile/gen/proto",
                "${workspaceRoot}/externals/windows/vscode/usr/include/c++/6",
                "${workspaceRoot}/externals/windows/vscode/usr/include/x86_64-linux-gnu/c++/6",
                "${workspaceRoot}/externals/windows/vscode/usr/include/c++/6/backward",
@@ -50,6 +51,7 @@
                    "${workspaceRoot}/build/ninja_debug/src",
                    "${workspaceRoot}/externals/windows/include",
                    "${workspaceRoot}/externals/linux/include",
+                    "${workspaceRoot}/externals/linux/include/tensorflow/contrib/makefile/gen/proto",
                    "${workspaceRoot}/externals/windows/vscode/usr/include/c++/6",
                    "${workspaceRoot}/externals/windows/vscode/usr/include/x86_64-linux-gnu/c++/6",
                    "${workspaceRoot}/externals/windows/vscode/usr/include/c++/6/backward",
@@ -74,6 +76,7 @@
                "${workspaceRoot}/build/ninja_debug/src",
                "${workspaceRoot}/externals/windows/include",
                "${workspaceRoot}/externals/linux/include",
+                "${workspaceRoot}/externals/linux/include/tensorflow/contrib/makefile/gen/proto",
                "${workspaceRoot}/externals/windows/vscode/usr/include/c++/6",
                "${workspaceRoot}/externals/windows/vscode/usr/include/x86_64-linux-gnu/c++/6",
                "${workspaceRoot}/externals/windows/vscode/usr/include/c++/6/backward",
@@ -6,7 +6,7 @@
            "name": "(gdb) Launch",
            "type": "cppdbg",
            "request": "launch",
-            "program": "${workspaceRoot}/build/ninja_debug/src/server/sparkd/sparkd",
+            "program": "${workspaceRoot}/build/ninja_debug/server/sparkd/sparkd",
            "args": ["run"],
            "stopAtEntry": false,
            "cwd": "${workspaceRoot}/build/ninja_debug/src/server/sparkd",
@@ -36,8 +36,8 @@
         "name": "SDK Launch",
         "type": "clr",
         "request": "launch",
-         "program": "${workspaceRoot}/build/Debug/bin/net471/spark_sdk.exe",
-         "args": ["md","GLBX","Future","ZN", "ZNU8"],
+         "program": "${workspaceRoot}/build/Debug/bin/net471/spark_sdk.exe",         
+         "args": ["md","GLBX","Future","CL", "CLZ9", "--user=bts", "--pass="],
         "cwd": "${workspaceRoot}",
         "stopAtEntry": false,
         "externalConsole": true,
@@ -48,7 +48,7 @@
         "type": "clr",
         "request": "launch",
         "program": "C:/Program Files/Microsoft Office/Office14/EXCEL.EXE",
-         "args": ["${workspaceRoot}/build/Debug/bin/net471/spark_excel-addin64.xll"],
+         "args": ["${workspaceRoot}/build/Debug/bin/net471/spark_excel-addin64-packed.xll"],
         "cwd": "${workspaceRoot}",
         "stopAtEntry": false,
         "externalConsole": true,
@@ -75,10 +75,10 @@
            "name": "SparkVM Launch",
            "type": "cppdbg",
            "request": "launch",
-            "program": "/home/bts/spark/build/ninja_debug/src/server/sparkd/sparkd",
+            "program": "/home/bts/spark/build/ninja_debug/server/sparkd",
            "args": ["run"],
            "stopAtEntry": false,
-            "cwd": "/home/bts/spark/build/ninja_debug/src/server/sparkd/",
+            "cwd": "/home/bts/spark/build/ninja_debug/server/",
            "environment": [],
            "externalConsole": true,
            "MIMode": "gdb",
@@ -108,6 +108,46 @@
                "/home/bts/spark/": "${workspaceRoot}"
            }
        },
+      {
+         "name": "TFTest ",
+         "type": "cppdbg",
+         "request": "launch",
+         "program": "/home/bts/spark/build/ninja_debug/sdk/examples/tf_test",
+         "args": [
+         ],
+         "stopAtEntry": false,
+         "cwd": "/home/bts/spark/build/ninja_debug/sdk/examples/",
+         "environment": [],
+         "externalConsole": true,
+         "MIMode": "gdb",
+         "preLaunchTask": "",
+         "logging": {
+            "engineLogging": false
+         },
+         "setupCommands": [
+            {
+               "description": "Enable pretty-printing for gdb",
+               "text": "enable pretty-printer",
+               "ignoreFailures": true
+            },
+            {
+               "description": "Skip STL",
+               "text": "skip -gfi /usr/include/c++/7/bits/*.h",
+               "ignoreFailures": true
+            }
+         ],
+         "pipeTransport": {
+            "pipeCwd": "${workspaceRoot}",
+            "pipeProgram": "c:\\program files\\git\\usr\\bin\\ssh.exe",
+            "pipeArgs": [
+               "bts@sparkvm"
+            ],
+            "debuggerPath": "/usr/bin/gdb"
+         },
+         "sourceFileMap": {
+            "/home/bts/spark/": "${workspaceRoot}"
+         }
+      },        
        {
            "name": "Spreader Tests",
            "type": "cppdbg",
@@ -209,7 +249,7 @@
            "type": "cppdbg",
            "request": "launch",
            "program": "/home/bts/spark/build/ninja_debug/src/server/sparkd/sparkd",
-            "args": ["test","Co2Tests"],
+            "args": ["test","AuthToken"],
            "stopAtEntry": false,
            "cwd": "/home/bts/spark/build/ninja_debug/src/server/sparkd/",
            "environment": [],
@@ -13,7 +13,7 @@ set (SPARK_BIN "${EXTERNALS_ROOT}/bin")
 set (SPARK_INCLUDE "${EXTERNALS_ROOT}/include")
 set (SPARK_LIB "${EXTERNALS_ROOT}/lib/${CMAKE_BUILD_TYPE}")

-include_directories (BEFORE SYSTEM ${SPARK_INCLUDE} ${EXTERNALS_ROOT}/include/zlib)
+include_directories (BEFORE SYSTEM ${SPARK_INCLUDE} ${EXTERNALS_ROOT}/include/zlib ${TF_INCLUDE})
 link_directories (${SPARK_LIB})

 if (WIN32)
@@ -57,6 +57,9 @@ else ()
    COMMAND ln ARGS -sf ${CMAKE_BINARY_DIR}/src/lib/libspark.so ${CMAKE_BINARY_DIR}/server
    COMMAND mkdir ARGS -p ${CMAKE_BINARY_DIR}/server/plugins
    COMMAND ln ARGS -sf ${CMAKE_BINARY_DIR}/sdk/examples/order_plugin_example.so ${CMAKE_BINARY_DIR}/server/plugins/
+    COMMAND ln ARGS -sf ${CMAKE_BINARY_DIR}/sdk/examples/ai_order_plugin_example.so ${CMAKE_BINARY_DIR}/server/plugins/
+    COMMAND ln ARGS -sf ${EXTERNALS_ROOT}/lib/Release/libtensorflow.so ${CMAKE_BINARY_DIR}/server/plugins
+    
    COMMENT "Creating server runtime layout"
    DEPENDS sparkd data_files_dir)  

@@ -1,11 +1,10 @@
 # The BTS Development Process #

-## The Big Picture ##
-
-Our development work is organized in projects. A project is an effort
-to specifiy, develop and validate a related set of additions to our
-Spark platform. A project can be assigned to one more developers and a
-developer might concurrently be assigned to multiple
+## Projects ##
+Our development work is organized in projects. A project is a
+non-trivial effort to specify, develop and validate a related set of
+additions to our Spark platform. A project can be assigned to one more
+developers and a developer might concurrently be assigned to multiple
 projects. Projects typically start out with specification work,
 proceed to implementation and finish with validation efforts. At any
 given time there will be multiple projects being worked on
@@ -14,16 +13,16 @@ are merged into the product and deployed to customers.

 ## The Details ##
 Typically project ideas come from sales interactions, opposition
-research and customer feedback, alltough on occasion development or
-operational requirements will also suggest potentially valuable
+research and customer feedback, all tough on occasion development or
+operational requirements can also suggest valuable project
 ideas. Whatever the source of a project idea the final decision of
 which projects to pursue is always done by management. Once a project
 idea has been selected for implementation the corresponding project
-will go through several phases: inception, specification, development
-and merge. We detail each of these phases below.
+will go through several phases: inception, specification, development,
+validation and merge. 

-* Inception. In this phase we create the infrastructure for the
-project. Typically this means selecting a team, creating a project
+* Inception. In this phase the infrastructure for the project is
+created. Typically this means selecting a team, creating a project
 case in Jira (that is a case assigned to the team@bluetradesys.com
 Jira user) and possibly creating a new branch for the project. This
 phase is mostly mechanical and the responsibility of Pedro.
@@ -32,11 +31,11 @@ phase is mostly mechanical and the responsibility of Pedro.
 ill-considered idea project idea into a concrete, implementable
 specification that attempts to maximize the value/cost ratio of the
 project. It is hard to exaggerate the impact of a this phase on the
-rest of the project. *Nothing* has more impact on our ability to
-quickly deliver value to customers than good specification
-work. Specification typically take the form of shared google docs,
-using a mix of text and UI mockups to capture both user requirements
-and suggested implementation strategies. Taha is responsible for this
+rest of the project. *Nothing* has more impact on BTS's ability to
+quickly deliver value to customers than good specification work. A
+specification typically takes the form of a shared google docs using
+a mix of text and UI mock-ups to capture both user requirements and
+suggested implementation strategies. Taha and Kevin are responsible for this
 phase.

 * Development. Once a specification is complete, a team of developers
@@ -44,20 +43,35 @@ will use a project specific branch to implement the
 specification. Periodically, typically once a week, progress on the
 project is assessed by Pedro, possibly with the help of others. This
 assessment takes the form of code reviews, demos, or just one-on-one
-conversations. To ensure development does not go off on sub-optimal
-tangents, developers are expected to continuously merge master into
-the project branch as well as encouraged to create Pull Requests (PRs)
-early in the project implementation, so that their work is kept
-visible and integrated with that of the rest of the group. During the
+conversations. To ensure development does not go off on tangents,
+developers are expected to continuously merge master into the project
+branch as well as encouraged to create Pull Requests (PRs) early in
+the project implementation, so that their work is kept visible and
+integrated with that of the rest of the group. During the
 implementation phase developers should reach out to Pedro for UI
-reviews, architecture and design concerns as well as specification
-trade off concerns.
+reviews, architecture and design questions and specification trade off
+concerns.
+
+* Verification. Once code is complete it is the project's team job to
+think carefully about the best way to verify that the work is solid
+enough to go to production.  We do not have a dedicated QA cycle to
+flush out bugs so it is important for changes to be fully tested
+before being marked ready to merge (RTM).  For any non-trivial change
+project teams should enlist a 'test buddy' from outside the team to
+help review the code and think of test cases that they may not have
+considered.  Stability from release to release is especially critical
+right now as we develop a reputation in the futures
+world. Additionally, project teams are encouraged to make liberal use
+of other testing techniques such as
+  - Unit tests
+  - System tests
+  - Manual tests

 * Merge. Once a project is considered complete by developers, a PR
 that includes Pedro should be created (unless, as mentioned above, an
 early PR was already created in the development phase). Whether the PR
 already existed or not, its description should be changed to start
-with the "Ready To Merge" statement. This marks the project as ready
+with the RTM (Ready To Merge) acronym. This marks the project as ready
 to be merged into master. Once a week, typically on Mondays, Pedro
 will go through every PR marked as "Ready To Merge", build it, check
 it out and if everything looks good merge it to master. At the end of
@@ -66,6 +80,3 @@ number. This version will be go through some additional testing by
 Brian and will then be deployed by Karl and Pete to customers
 throughout the rest of the week.

-## Tools ##
-  * Pre-Merge checklist
-  * Code Review tutorial
@@ -1,4 +1,94 @@
 # Release Notes
+
+## 1.5.0
+### User Visible Changes 
+#### User Interface Improvements 
+  - Removed security key field from most grids
+  - Removed trade key field from time and sales grid 
+  - Fixed the "Since Open" time filter to use the exchange open time rather than 8:30 AM
+  - Fixed the floating order book so that rows are no longer
+    highlighted after an order is modified
+#### SDK
+  - Improved SDK documentation and usability
+### Internal Changes
+  - Improved robustness of limit system test
+  - Extensive market data refactoring allow for security definition updates
+	
+
+## 1.4.11
+### New Features
+  - Floating Order Book
+    - The floating order book provides a quick view of orders occupying a price level in the ladder
+    - Launch the Floating Order Book by middle-clicking a ladder badge 
+    - Cancel orders by clicking on the red X in the Cancel column
+    - Quantity and Price modification
+      - Clicking on a row will select it, providing the option for changing your price and quantity
+      - Enter in a new value or use the up/down buttons to set a desired value
+      - Press the green checkbox to finalize your change and update the order
+### SDK
+  - Improved SDK documentation and usability
+### User Interface Improvements
+  - The following spreader quoting parameters have been deprecated:
+    - Hidden parameter
+    - Price Type setting of the Conditional parameter
+### Bug Fixes
+  - Fixed a limit enforcement problem that could lead to 0 sized orders being sent to the exchange
+  
+## 1.4.10
+### Bug Fixes
+  - Removed duplicate entries in performance log
+  
+## 1.4.9
+### SDK
+  - Added ticker events to the order API
+### Performance Improvements
+  - Significantly improved hedging speed 
+### Bug Fixes
+  - Fixed a visual oddity in the order book UI when using High DPI displays
+  
+## 1.4.8
+### Marketdata
+  - Additional trade details for CME ticker
+
+## 1.4.7
+### Bug Fixes
+  - Corrected FIX tag 1028, ManualOrderIndicator, when orders are triggered by algos
+   
+## 1.4.6
+### Ladder Usability Improvements
+  - The ladder can now be zoomed in/out according to a user's preference
+  - The zoom slider can be enabled from Ladder Form -> Settings button -> Left Pane tab -> check Zoom Slider checkbox
+  - The zoom functionality can also be performed via hotkey and mouse wheel combinations
+    - Zoom In = CTRL + Mouse wheel up
+    - Zoom Out = CTRL + Mouse wheel down
+    - Reset zoom = CTRL + Mouse wheel click or double click on the zoom slider
+### Exchange simulator
+  - Improved the exchange simulator to track real market data more closely
+### Bug Fixes
+  - Fixed a UI crash in some cases when attempting to sort the order book by time
+
+## 1.4.5
+  - Fixed entitlement validation for ICS spreads
+  - Tuned performance logging
+  
+## 1.4.4
+
+### Performance Improvements
+  - Reduced performance logging activity
+  
+## 1.4.3
+
+### Ladder Usability Improvements
+  - Controls found in Left Pane of the ladder can now be hidden via the checkboxes found under Ladder Form -> Settings button -> Left Pane tab
+  - The Left Pane is now scrollable with the mouse wheel when there isn't enough vertical space to accomodate the entire form
+  - The Left Pane can now grown and shrunk horizontally via the splitter between the left pane and the main ladder area
+### Performance Improvements
+  - Requoting and hedging latency has been reduced by up to 30%
+### Software Development Kit (SDK) Improvements
+  - The API now enforces authentication 
+### Bug Fixes
+  - The Market View form now honors filters when new securities are added
+  
 ## 1.4.2

 ### User Interface Improvements
@@ -0,0 +1,27 @@
+{
+	"folders": [
+      {
+         "path": "."
+      },  	
+	  {
+        "uri": "sftp://bts:BT5u53r@sparkvm:22/home/bts/",
+        "name": "sparkvm"
+      }	  
+   ],
+   "settings": {
+      "files.associations": {
+         "utility": "cpp",
+         "initializer_list": "cpp",
+         "list": "cpp",
+         "type_traits": "cpp",
+         "vector": "cpp",
+         "xhash": "cpp",
+         "xstring": "cpp",
+         "system_error": "cpp",
+         "array": "cpp",
+         "string_view": "cpp",
+         "xutility": "cpp",
+         "*.ipp": "cpp"
+      }
+   }
+}
@@ -0,0 +1,77 @@
+{
+	"folders": [
+      {
+         "path": "."
+      }  
+   ],
+   "settings": {
+      "files.associations": {
+         "utility": "cpp",
+         "initializer_list": "cpp",
+         "list": "cpp",
+         "type_traits": "cpp",
+         "vector": "cpp",
+         "xhash": "cpp",
+         "xstring": "cpp",
+         "system_error": "cpp",
+         "array": "cpp",
+         "string_view": "cpp",
+         "xutility": "cpp",
+         "*.ipp": "cpp",
+         "atomic": "cpp",
+         "hash_map": "cpp",
+         "hash_set": "cpp",
+         "*.tcc": "cpp",
+         "bitset": "cpp",
+         "cctype": "cpp",
+         "cfenv": "cpp",
+         "chrono": "cpp",
+         "cinttypes": "cpp",
+         "clocale": "cpp",
+         "cmath": "cpp",
+         "complex": "cpp",
+         "condition_variable": "cpp",
+         "csignal": "cpp",
+         "cstdarg": "cpp",
+         "cstddef": "cpp",
+         "cstdint": "cpp",
+         "cstdio": "cpp",
+         "cstdlib": "cpp",
+         "cstring": "cpp",
+         "ctime": "cpp",
+         "cwchar": "cpp",
+         "cwctype": "cpp",
+         "deque": "cpp",
+         "forward_list": "cpp",
+         "unordered_map": "cpp",
+         "unordered_set": "cpp",
+         "exception": "cpp",
+         "any": "cpp",
+         "optional": "cpp",
+         "fstream": "cpp",
+         "functional": "cpp",
+         "future": "cpp",
+         "iomanip": "cpp",
+         "iosfwd": "cpp",
+         "iostream": "cpp",
+         "istream": "cpp",
+         "limits": "cpp",
+         "memory": "cpp",
+         "mutex": "cpp",
+         "new": "cpp",
+         "ostream": "cpp",
+         "numeric": "cpp",
+         "ratio": "cpp",
+         "scoped_allocator": "cpp",
+         "sstream": "cpp",
+         "stdexcept": "cpp",
+         "streambuf": "cpp",
+         "thread": "cpp",
+         "tuple": "cpp",
+         "typeindex": "cpp",
+         "typeinfo": "cpp",
+         "valarray": "cpp",
+         "variant": "cpp"
+      }
+   }
+}
@@ -6,6 +6,7 @@ using System.ComponentModel.Composition;
 using System.Linq;
 using System.Reactive.Linq;
 using System.Reactive.Subjects;
+using bts.api.core;

 namespace mbts.spark {
   [Export]
@@ -17,31 +17,22 @@ using bts.api.user;

 namespace bts {
   [Export(typeof(IInitializable))]
-   class MDSource : IObserver<List<SecurityAndHandle>>, IInitializable, IDisposable {
+   class MDDaemon : bts.md.MDSource, IObserver<List<SecurityAndHandle>>, IInitializable, IDisposable {
      readonly Lazy<IBus> _bus;
-      readonly Lazy<AuthToken> _token;
+      readonly Lazy<AuthTokenImmutable> _token;
      readonly Lazy<SyntheticSecurityService> _ss;
-      readonly MDConsumer _consumer = new MDConsumer();
-      readonly Co2RelayControl _relay;
      readonly Dictionary<SecurityKey, SecurityMD> _deleted_synthetics = new Dictionary<SecurityKey, SecurityMD>();
-      long _version = 0;
-      readonly ConcurrentDictionary<SecurityKey, SecurityMD> _exchange_sec_map = new ConcurrentDictionary<SecurityKey, SecurityMD>();
-      List<IDisposable> _dispose = new List<IDisposable>();
+
+      static uint get_naggle() => mbts.config.Configuration.get<bts.md.RelayOptions>().naggle_ms;

      [ImportingConstructor]
-      public MDSource(
-         Lazy<IBus> bus,
-         Lazy<AuthToken> token, 
-         Lazy<SyntheticSecurityService> ss) {
+      public MDDaemon(Lazy<IBus> bus, Lazy<AuthTokenImmutable> token, Lazy<SyntheticSecurityService> ss) : base(get_naggle(), true) {
         _bus = bus;
         _token = token;
-         _ss = ss;
-         _relay = new Co2RelayControl(_consumer);
-         _relay.preload_securities((co2.MDRequest.Types.Flags)0xff).ignore();
-         _dispose.Add(_consumer.on_security.Subscribe(this));
+         _ss = ss;         
      }

-      public void initialize() {
+      override public void initialize() {
         _relay.set_token(_token.Value);
         _dispose.Add(
            _ss.Value.subscribei_metadata()
@@ -66,6 +57,9 @@ namespace bts {
               // Post full dictionary of syntheics here
               bus.post(SparkTags.SyntheticstrategiesTag, t);
            }));
+         _dispose.Add( this.on_securities.Subscribe( (md) => {
+            bus.post(SparkTags.SecuritiesTag, md);
+         }));            
         Task.Run(run);
      }

@@ -74,37 +68,5 @@ namespace bts {

      public int priority => 55;
      IBus bus => _bus.Value;
-
-      public void OnCompleted() { }
-      public void OnError(Exception error) => Log.Md.error(error.ToString());
-      public void OnNext(List<SecurityAndHandle> values) {
-         if (values.Count > 0) {
-            foreach (var v in values) {
-               var smd = new SecurityMD(v.security, v.handle);
-               _exchange_sec_map.AddOrUpdate(smd.security.Id, smd, (_, __) => smd);
-            }
-            _version += 1;
-         }
-      }
-
-      public void Dispose() => Disposable.dispose(_dispose);
-      async Task run() {
-         long run_version = 0;
-         while (true) {
-            var exch = _exchange_sec_map;
-            long current_version = _version;
-            if (current_version > run_version) {
-               run_version = current_version;
-               try {
-                  Log.Md.info($"MDSource publishing {exch.Count} securities");
-                  bus.post(SparkTags.SecuritiesTag, exch);
-               } catch (Exception e) {
-                  Log.Md.error($"Error in publish_securities: {e}");
-               }
-            }
-            await Task.Delay(TimeSpan.FromSeconds(1));
-         }
-      }
-
   }
 }
@@ -13,10 +13,7 @@ using System.ComponentModel.Composition;
 namespace Spark {
   public class ShellServices {
      [Export]
-      public static ServiceContext context { get; } = new ServiceContext();
-
-      [Export]
-      public UserService user_service => context.locate<UserService>();
+      public ServiceContext context { get; } = new ServiceContext();

      [Export("settings")]
      public PersistenceService settings_service => context.locate<PersistenceService>("settings");
@@ -31,7 +31,9 @@ namespace mbts.ui {
      }

      private static ImageSource load_resource_and_freeze(string resource_name) {
-         return ((DrawingImage)_resources[resource_name]).frozen();
+         lock (_resources) {
+            return ((DrawingImage)_resources[resource_name]).frozen();
+         }
      }

 #pragma warning disable CS0618 // Type or member is obsolete
@@ -152,7 +154,10 @@ namespace mbts.ui {
      }

      static IEnumerable<string> _get_geometric_path(string geometric_path_key) {
-         object obj = _resources[geometric_path_key];
+         object obj;
+         lock (_resources) {
+            obj = _resources[geometric_path_key];
+         }
         if (obj is string path) {
            if (string.IsNullOrEmpty(path)) {
               Log.Api.error($"Resource lookup of '{geometric_path_key}' did not return a valid string.", nameof(geometric_path_key));
@@ -35,7 +35,7 @@ namespace mbts.spark {
         readonly CellProperty<string> _working_bids_text, _working_asks_text;
         readonly MyOrderSummarizer _order_summarizer = new MyOrderSummarizer();
         readonly MDDisplayHelper.SizeFormatter _size_formatter = MDDisplayHelper.get_formatter(MarketSizeDisplay.get_default());
-         uint _bid_direct_size, _bid_merged_size, _ask_direct_size, _ask_merged_size;
+         Property<uint> _bid_direct_size, _bid_merged_size, _ask_direct_size, _ask_merged_size;
         string _bid_merged_size_text, _ask_merged_size_text;
         ulong _bbo_ref, _last_ref;

@@ -45,28 +45,33 @@ namespace mbts.spark {
            _security_text = smd.security.ToString();
            _security_key_text = security_key.ToString();
            string format_price(double price) => security.ContractSpec.format(price);
-            _position = new CellProperty<int>(0);
+            _position = new CellProperty<int>(this, nameof(position), 0);
            _bid_price = backing(nameof(bid_price), double.NaN);
            _ask_price = backing(nameof(ask_price), double.NaN);
            _last_price = backing(nameof(last_price), double.NaN);
-            _last_size = new CellProperty<uint>(0);
+            _last_size = new CellProperty<uint>(this, nameof(last_size), 0);
            _day_change = backing(nameof(day_change), double.NaN);
            _session_low = backing(nameof(session_low), double.NaN);
            _session_high = backing(nameof(session_high), double.NaN);
            _settlement = backing(nameof(settlement), double.NaN);
-            _volume = new CellProperty<ulong>(0);
-            _inside_bids = new CellProperty<bool>();
-            _inside_asks = new CellProperty<bool>();
-            _working_bid_volume = new CellProperty<int>();
-            _working_ask_volume = new CellProperty<int>();
+            _volume = new CellProperty<ulong>(this, nameof(volume), 0);
+            _inside_bids = new CellProperty<bool>(this, nameof(inside_bids));
+            _inside_asks = new CellProperty<bool>(this, nameof(inside_asks));
+            _working_bid_volume = new CellProperty<int>(this, nameof(working_bid_volume));
+            _working_ask_volume = new CellProperty<int>(this, nameof(working_ask_volume));
+            //
+            _bid_direct_size = backing(nameof(bid_direct_size), default(uint));
+            _bid_merged_size = backing(nameof(bid_merged_size), default(uint));
+            _ask_direct_size = backing(nameof(ask_direct_size), default(uint));
+            _ask_merged_size = backing(nameof(ask_merged_size), default(uint));
            //
            _working_orders = new ObservableFilterCollection<OrderRecordImmutable>(_orders, o => o.is_active());
            _working_bids = new ObservableFilterCollection<OrderRecordImmutable>(_working_orders, o => o.Def.Side == Side.Buy);
            _working_asks = new ObservableFilterCollection<OrderRecordImmutable>(_working_orders, o => o.Def.Side == Side.Sell);
-            _working_best_bid = new CellProperty<double>(format_price, double.NaN);
-            _working_best_ask = new CellProperty<double>(format_price, double.NaN);
-            _working_bids_text = new CellProperty<string>(string.Empty);
-            _working_asks_text = new CellProperty<string>(string.Empty);
+            _working_best_bid = new CellProperty<double>(this, nameof(working_best_bid), format_price, double.NaN);
+            _working_best_ask = new CellProperty<double>(this, nameof(working_best_ask), format_price, double.NaN);
+            _working_bids_text = new CellProperty<string>(this, nameof(working_bids_text), string.Empty);
+            _working_asks_text = new CellProperty<string>(this, nameof(working_asks_text), string.Empty);
            //
            default_command = new DelegateCommand(_show_ladder);
            bid_price_click = new DelegateCommand(() => _show_order_ticket(MarketViewView.Columns.Bid));
@@ -100,15 +105,15 @@ namespace mbts.spark {
         public double last_price => _last_price.Value;
         public uint last_size => _last_size.value;
         public double bid_price => _bid_price.Value;
-         public uint bid_direct_size => _bid_direct_size;
-         public uint bid_implied_size => _bid_merged_size - _bid_direct_size;
-         public uint bid_merged_size => _bid_merged_size;
-         public string bid_merged_size_text => _bid_merged_size_text ?? (_bid_merged_size_text = _size_formatter(_bid_merged_size, bid_implied_size));
+         public uint bid_direct_size => _bid_direct_size.Value;
+         public uint bid_implied_size => _bid_merged_size.Value - _bid_direct_size.Value;
+         public uint bid_merged_size => _bid_merged_size.Value;
+         public string bid_merged_size_text => _bid_merged_size_text ?? (_bid_merged_size_text = _size_formatter(_bid_merged_size.Value, bid_implied_size));
         public double ask_price => _ask_price.Value;
-         public uint ask_direct_size => _ask_direct_size;
-         public uint ask_implied_size => _ask_merged_size - _ask_direct_size;
-         public uint ask_merged_size => _ask_merged_size;
-         public string ask_merged_size_text => _ask_merged_size_text ?? (_ask_merged_size_text = _size_formatter(_ask_merged_size, ask_implied_size));
+         public uint ask_direct_size => _ask_direct_size.Value;
+         public uint ask_implied_size => _ask_merged_size.Value - _ask_direct_size.Value;
+         public uint ask_merged_size => _ask_merged_size.Value;
+         public string ask_merged_size_text => _ask_merged_size_text ?? (_ask_merged_size_text = _size_formatter(_ask_merged_size.Value, ask_implied_size));
         public ulong volume => _volume.value;
         public double settlement => _settlement.Value;
         public double day_change => _day_change.Value;
@@ -144,9 +149,9 @@ namespace mbts.spark {
            bool dirty = false;
            if (md.md.get_bbo(ref _bbo_ref, out NativePriceSize b, out NativePriceSize a)) {
               _bid_price.set(b.price);
-               refresh_size(ref b, ref _bid_direct_size, ref _bid_merged_size, ref _bid_merged_size_text, nameof(bid_merged_size_text));
+               refresh_size(ref b, _bid_direct_size, _bid_merged_size, ref _bid_merged_size_text, nameof(bid_merged_size_text));
               _ask_price.set(a.price);
-               refresh_size(ref a, ref _ask_direct_size, ref _ask_merged_size, ref _ask_merged_size_text, nameof(ask_merged_size_text));
+               refresh_size(ref a, _ask_direct_size, _ask_merged_size, ref _ask_merged_size_text, nameof(ask_merged_size_text));
               _inside_bids.on_next_distinct(_bid_price.Value >= _working_best_bid.value, ref dirty);
               _inside_asks.on_next_distinct(_ask_price.Value <= _working_best_ask.value, ref dirty);
            }
@@ -162,10 +167,10 @@ namespace mbts.spark {
            if (dirty)
               invalidated?.Invoke();

-            void refresh_size(ref NativePriceSize nps, ref uint direct, ref uint merged, ref string text, string text_prop) {
-               if (nps.size != merged || nps.direct_size != direct) {
-                  merged = nps.size;
-                  direct = nps.direct_size;
+            void refresh_size(ref NativePriceSize nps, Property<uint> direct, Property<uint> merged, ref string text, string text_prop) {
+               if (nps.size != merged.Value || nps.direct_size != direct.Value) {
+                  merged.set(nps.size);
+                  direct.set(nps.direct_size);
                  text = null;
                  dirty = true;
                  RaisePropertyChanged(text_prop);
@@ -205,36 +210,28 @@ namespace mbts.spark {
            var order = _orders_model.factory.order(security);
            switch (col) {
               case MarketViewView.Columns.Bid:
-                  order.Side = Side.Sell;
-                  _bus.post(SparkTags.ShowOrderTicketTag, (order, bid_price, 0u));
+                  _bus.post(SparkTags.ShowOrderTicketTag, (order.with(side:Side.Sell), bid_price, 0u));
                  break;
               case MarketViewView.Columns.BidMergedSize:
-                  order.Side = Side.Sell;
-                  _bus.post(SparkTags.ShowOrderTicketTag, (order, bid_price, bid_merged_size));
+                  _bus.post(SparkTags.ShowOrderTicketTag, (order.with(side:Side.Sell), bid_price, bid_merged_size));
                  break;
               case MarketViewView.Columns.BidDirectSize:
-                  order.Side = Side.Sell;
-                  _bus.post(SparkTags.ShowOrderTicketTag, (order, bid_price, bid_direct_size));
+                  _bus.post(SparkTags.ShowOrderTicketTag, (order.with(side:Side.Sell), bid_price, bid_direct_size));
                  break;
               case MarketViewView.Columns.BidImpliedSize:
-                  order.Side = Side.Sell;
-                  _bus.post(SparkTags.ShowOrderTicketTag, (order, bid_price, bid_implied_size));
+                  _bus.post(SparkTags.ShowOrderTicketTag, (order.with(side:Side.Sell), bid_price, bid_implied_size));
                  break;
               case MarketViewView.Columns.Ask:
-                  order.Side = Side.Buy;
-                  _bus.post(SparkTags.ShowOrderTicketTag, (order, ask_price, 0u));
+                  _bus.post(SparkTags.ShowOrderTicketTag, (order.with(side:Side.Buy), ask_price, 0u));
                  break;
               case MarketViewView.Columns.AskMergedSize:
-                  order.Side = Side.Buy;
-                  _bus.post(SparkTags.ShowOrderTicketTag, (order, ask_price, ask_merged_size));
+                  _bus.post(SparkTags.ShowOrderTicketTag, (order.with(side:Side.Buy), ask_price, ask_merged_size));
                  break;
               case MarketViewView.Columns.AskDirectSize:
-                  order.Side = Side.Sell;
-                  _bus.post(SparkTags.ShowOrderTicketTag, (order, ask_price, ask_direct_size));
+                  _bus.post(SparkTags.ShowOrderTicketTag, (order.with(side:Side.Sell), ask_price, ask_direct_size));
                  break;
               case MarketViewView.Columns.AskImpliedSize:
-                  order.Side = Side.Sell;
-                  _bus.post(SparkTags.ShowOrderTicketTag, (order, ask_price, ask_implied_size));
+                  _bus.post(SparkTags.ShowOrderTicketTag, (order.with(side:Side.Sell), ask_price, ask_implied_size));
                  break;
               case MarketViewView.Columns.Last:
                  _bus.post(SparkTags.ShowOrderTicketTag, (order, last_price, 0u));
@@ -266,7 +263,15 @@ namespace mbts.spark {
            _working_best_ask.on_next_distinct(_order_summarizer.best_working_ask, ref dirty);
            _inside_bids.on_next_distinct(_order_summarizer.best_working_bid >= bid_price, ref dirty);
            _inside_asks.on_next_distinct(_order_summarizer.best_working_ask <= ask_price, ref dirty);
-            RaisePropertyChanged(nameof(working_bids_text), nameof(working_asks_text));
+
+            RaisePropertyChanged(
+               // Implied might not be ever set, so it probably does not RaisePropertyChanged either
+               // This might be part of the filter funk?
+               //nameof(bid_implied_size),
+               //nameof(ask_implied_size),
+               nameof(working_bids_text), 
+               nameof(working_asks_text)
+            );
         }
         #endregion

@@ -96,7 +96,7 @@ namespace bts.shell {
            public static GridColumnSettings day_change => new GridColumnSettings(col_id(Columns.DayChange), DefaultColumnHeaders.DayChange, width: DefaultColumnWidths.Price, horizontal_alignment: System.Windows.HorizontalAlignment.Right);
            public static GridColumnSettings session_low => new GridColumnSettings(col_id(Columns.SessionLow), DefaultColumnHeaders.SessionLow, width: DefaultColumnWidths.Price, horizontal_alignment: System.Windows.HorizontalAlignment.Right);
            public static GridColumnSettings session_high => new GridColumnSettings(col_id(Columns.SessionHigh), DefaultColumnHeaders.SessionHigh, width: DefaultColumnWidths.Price, horizontal_alignment: System.Windows.HorizontalAlignment.Right);
-            public static GridColumnSettings security_key => new GridColumnSettings(col_id(Columns.SecurityKey), DefaultColumnHeaders.SecurityKey, width: DefaultColumnWidths.SecurityKey);
+            public static GridColumnSettings security_key => new GridColumnSettings(col_id(Columns.SecurityKey), DefaultColumnHeaders.SecurityKey, is_visible: false, width: DefaultColumnWidths.SecurityKey);



@@ -97,8 +97,11 @@ namespace mbts.spark {
         public IEnumerable<TradeInfo> read_trades() {
            var copy = _securities;
            foreach (var tm in _channel.read_trades(ref _cursor)) {
-               if (copy.TryGetValue(tm.Key, out SecurityImmutable sec))
-                  yield return new TradeInfo(sec, tm);
+               if (tm != null) {
+                  if (copy.TryGetValue(tm.Key, out SecurityImmutable sec)) {
+                     yield return new TradeInfo(sec, new TradeMessageImmutable(tm));
+                  }
+               }
            }
         }
      }
@@ -38,7 +38,6 @@ namespace mbts.spark {
            price_filter.load_state(filters.price);
            size_filter.load_state(filters.size);
            aggressor_filter.load_state(filters.aggressor_sides);
-            trade_key_filter.load_state(filters.trade_key);
            security_key_filter.load_state(filters.security_key);
         }
         // Columns
@@ -47,7 +46,6 @@ namespace mbts.spark {
         add_column(TimeAndSalesView.Columns.Price, DefaultColumnHeaders.Price, DefaultColumnWidths.Price, nameof(Row.price), price_filter, DataGridFilterKnownTemplates.DoubleMinMax, System.Windows.HorizontalAlignment.Right);
         add_column(TimeAndSalesView.Columns.Size, DefaultColumnHeaders.Size, DefaultColumnWidths.Size, nameof(Row.size), size_filter, DataGridFilterKnownTemplates.UIntMinMax, System.Windows.HorizontalAlignment.Right);
         add_column(TimeAndSalesView.Columns.Aggressor, DefaultColumnHeaders.Aggressor, DefaultColumnWidths.Aggressor, nameof(Row.aggressor_side), aggressor_filter, DataGridFilterKnownTemplates.EnumValues);
-         add_column(TimeAndSalesView.Columns.TradeKey, DefaultColumnHeaders.TradeKey, DefaultColumnWidths.TradeKey, nameof(Row.trade_key), trade_key_filter, DataGridFilterKnownTemplates.Regex);
         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(
@@ -66,7 +64,7 @@ namespace mbts.spark {
         _resources.AddRange(
            show_ladder,
            DataGridFilterHelper.hook_filters(
-               rows_view, time_filter, security_filter, price_filter, size_filter, aggressor_filter, trade_key_filter, security_key_filter),
+               rows_view, time_filter, security_filter, price_filter, size_filter, aggressor_filter, security_key_filter),
            settings_manager.subscribe_current().OnDispatcher().Subscribe(grid_settings_manager)
          );
         rows_view.set_sort_descriptions(startup_data.sorting_criterion, columns);
@@ -103,7 +101,6 @@ namespace mbts.spark {
      public IDataGridColumnPersistentFilter<Row, UIntMinMaxState> size_filter { get; } = new UIntMinMax<Row>(r => r.size, nameof(Row.size));
      public IDataGridColumnPersistentFilter<Row, AggressorSide[]> aggressor_filter { get; } = DiscreteValuesFilterVM.Create<Row, AggressorSide>(EnumHelper.get_values<AggressorSide>().ToArray(), r => r.aggressor_side, nameof(Row.aggressor_side));
      public IDataGridColumnPersistentFilter<Row, string> security_key_filter { get; } = new RegexFilterVM<Row>(r => r.security_key.ToString(), nameof(Row.security_key));
-      public IDataGridColumnPersistentFilter<Row, string> trade_key_filter { get; } = new RegexFilterVM<Row>(r => r.trade_key.ToString(), nameof(Row.trade_key));

      FilterStates _get_filter_states() =>
         new FilterStates {
@@ -111,7 +108,6 @@ namespace mbts.spark {
            security = security_filter.get_state(),
            price = price_filter.get_state(),
            size = size_filter.get_state(),
-            trade_key = trade_key_filter.get_state(),
            security_key = security_key_filter.get_state(),
            aggressor_sides = aggressor_filter.get_state()
         };
@@ -175,7 +171,6 @@ namespace mbts.spark {
                  case TimeAndSalesView.Columns.Price: return _price_text;
                  case TimeAndSalesView.Columns.Size: return _size_text;
                  case TimeAndSalesView.Columns.Aggressor: return _aggressor_text;
-                  case TimeAndSalesView.Columns.TradeKey: return _trade_key_text;
                  case TimeAndSalesView.Columns.SecurityKey: return _security_key_text;
                  default: return null;
               }
@@ -7,7 +7,7 @@ namespace mbts.ui.spark {
   /// Interaction logic for TimeAndSalesView.xaml
   /// </summary>
   partial class TimeAndSalesView : UserControl {
-      public enum Columns { Time, Security, Price, Size, OrderType, TradeKey, SecurityKey, Aggressor }
+      public enum Columns { Time, Security, Price, Size, OrderType, SecurityKey, Aggressor }

      public TimeAndSalesView() =>
         InitializeComponent();
@@ -84,8 +84,7 @@ namespace bts.shell {
            public static GridColumnSettings price => new GridColumnSettings(col_id(Columns.Price), DefaultColumnHeaders.Price, width: DefaultColumnWidths.Price, horizontal_alignment: System.Windows.HorizontalAlignment.Right);
            public static GridColumnSettings size => new GridColumnSettings(col_id(Columns.Size), DefaultColumnHeaders.Size, width: DefaultColumnWidths.Size, horizontal_alignment: System.Windows.HorizontalAlignment.Right);
            public static GridColumnSettings aggressor => new GridColumnSettings(col_id(Columns.Aggressor), DefaultColumnHeaders.Aggressor, width: DefaultColumnWidths.Aggressor);
-            public static GridColumnSettings trade_key => new GridColumnSettings(col_id(Columns.TradeKey), DefaultColumnHeaders.TradeKey, width: DefaultColumnWidths.TradeKey);
-            public static GridColumnSettings security_key => new GridColumnSettings(col_id(Columns.SecurityKey), DefaultColumnHeaders.SecurityKey, width: DefaultColumnWidths.SecurityKey);
+            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 {
@@ -100,7 +99,6 @@ namespace bts.shell {
                  yield return price;
                  yield return size;
                  yield return aggressor;
-                  yield return trade_key;
                  yield return security_key;
               }
            }
@@ -117,8 +115,8 @@ namespace bts.shell {
         public DoubleMinMaxState price;
         [ProtoMember(4)]
         public UIntMinMaxState size;
-         [ProtoMember(5)]
-         public string trade_key;
+         // [ProtoMember(5)]
+         // ProtoMember 5 cannot be used further
         [ProtoMember(6)]
         public string security_key;
         [ProtoMember(7)]
@@ -53,8 +53,8 @@ namespace mbts.spark {
         return null;
      }

-      public async Task<uint?> create_synthetic(SecurityImmutable synthetic) {
-         var result = await _service.create_synthetic_async(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;
      }

@@ -66,7 +66,7 @@ namespace bts.shell {
            public static GridColumnSettings description => new GridColumnSettings(col_id(Columns.Description), DefaultColumnHeaders.Description, width: DefaultColumnWidths.Description);
            public static GridColumnSettings n_legs => new GridColumnSettings(col_id(Columns.n_legs), DefaultColumnHeaders.N_Legs, width: DefaultColumnWidths.N_Legs);
            public static GridColumnSettings n_working_orders => new GridColumnSettings(col_id(Columns.n_working_orders), DefaultColumnHeaders.N_Working_Orders, width: DefaultColumnWidths.N_Working_Orders);
-            public static GridColumnSettings security_key => new GridColumnSettings(col_id(Columns.SecurityKey), DefaultColumnHeaders.SecurityKey, width: DefaultColumnWidths.SecurityKey);
+            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 {
@@ -205,7 +205,7 @@ namespace mbts.spark {
            //new EnableHedgeModel(), //TAHA_SPREADER
            new HedgeRatioModel(),
            //new MinLeanQtyModel(), //TAHA_SPREADER
-            new QuoteHiddenModel(),
+            //new QuoteHiddenModel(),
            new MarketDataTypeModel(),
            new MarketDataCalculationModel(),
            new QuoteThrottleEnabledModel(quote_throttle_inside_ticks, quote_throttle_outside_ticks),
@@ -213,7 +213,7 @@ namespace mbts.spark {
            quote_throttle_outside_ticks,
            new ConditionalQuoteEnabledModel(conditional_quoting_ticks, conditional_quoting_price_type),
            conditional_quoting_ticks,
-            conditional_quoting_price_type,
+            //conditional_quoting_price_type,
            //new QuoteInsideMarketThrottleEnabledModel(quote_inside_market_throttle_ticks, quote_inside_market_throttle_min_move),
            //quote_inside_market_throttle_ticks,
            //quote_inside_market_throttle_min_move,
@@ -294,9 +294,9 @@ namespace mbts.spark {
         base.Dispose(disposing);
      }

-      static string _deduce_symbol(SecurityImmutable security) {
-         if (!string.IsNullOrWhiteSpace(security.Symbol)) return security.Symbol;
-         if (security.Synthetic.Legs.Count() > 0) return security.Synthetic.Legs.First().Security.Symbol;
+      static string _deduce_symbol(SecurityImmutable? security) {
+         if (!string.IsNullOrWhiteSpace(security?.Symbol)) return security?.Symbol;
+         if (security?.Synthetic.Legs.Count() > 0) return security?.Synthetic.Legs.First().Security.Symbol;
         return string.Empty;
      }

@@ -178,7 +178,7 @@ namespace mbts.spark {
         } else return model.on_fill_tuples;
      }

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

      public class Row : SecurityRow, IEquatable<Row>, IRowVM {
@@ -186,7 +186,7 @@ namespace mbts.spark {
         readonly FillImmutable _fill;
         readonly OrderRecordImmutable _order;

-         public Row(FillTuple fill_tuple, OrdersModel model) : base(fill_tuple.security_md.HasValue ? fill_tuple.security_md.Value.security : SecurityDataHelper.Defaults.Security) {
+         public Row(FillTuple fill_tuple, OrdersModel model) : base(fill_tuple.security_md.HasValue ? fill_tuple.security_md.Value.security : SecurityDataHelper.Defaults.SecurityImmutable) {
            _fill = fill_tuple.fill;
            _order = fill_tuple.order ?? OrderDataHelper.Defaults.OrderRecordImmutable;
            _model = model;
@@ -86,7 +86,7 @@ namespace bts.shell {
            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, width: DefaultColumnWidths.SecurityKey);
+            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);
@@ -61,10 +61,12 @@ namespace bts.shell {
         var view = new Lazy<UIElement>(() => {
            var model = new LadderModel(md, _orders_model, _md_auxiliary_model);
            var settings_manager = new WindowSettingsManager<LadderSettings>(
-               _settings_hub, state_settings,
+               _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 vm = new LadderVM(_bus, model, settings_manager);
+            var init = state_settings ?? settings_manager.default_settings;
+            init.use_defaults |= state_settings == null;
+            var vm = new LadderVM(_bus, model, settings_manager, init);
            return new LadderView(vm);
         });
         string thread = Configuration.get<bts.config.toggles.LaddersOnThreads>().enabled ? $"Ladder{id:00}" : "";
@@ -0,0 +1,166 @@
+<!-- MaxHeight will force only x rows before vertical scrollbar shows up -->
+<!-- MinWidth will give enough room beyond the last column so that the the verical scrollbar does not eclipse the column content -->
+<UserControl x:Class="mbts.spark.MiniOrderBookView" x:ClassModifier="internal"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
+             xmlns:sp="clr-namespace:mbts.spark"
+             xmlns:uc="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"
+             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}">
+  <UserControl.Resources>
+    <ResourceDictionary>
+      <ResourceDictionary.MergedDictionaries>
+        <ResourceDictionary Source="/view/Controls/DataGridEx/Filters/Views/FilterTemplates.xaml"/>
+      </ResourceDictionary.MergedDictionaries>
+      <uspcv:TickDisplayConverter x:Key="TickDisplayConverter"/>
+      <uspcv:OrderSubTypeDisplayTextConverter x:Key="OrderSubTypeLongDisplayTextConverter" UseLongName="True" />
+      <DataTemplate x:Key="{x:Static sp:MiniOrderBookView.SubTypeFilterTemplateKey}">
+        <usp:FilterContentControl
+          ApplyCommandParameter="{Binding}"
+          ApplyCommand="{x:Static c:DataGridFilterProperties.CommitCommand}"
+          ClearCommandParameter="{Binding}"
+          ClearCommand="{x:Static c:DataGridFilterProperties.ClearCommand}"
+        >
+          <c:ListBoxEx
+            ItemsSource="{Binding items}"
+            Selection="{Binding selected_items}"
+            SelectionMode="Multiple"
+            ItemContainerStyle="{StaticResource ListBoxItemCheckBoxStyle}"
+          >
+            <c:ListBoxEx.ItemTemplate>
+               <DataTemplate>
+               <TextBlock Text="{Binding Converter={StaticResource OrderSubTypeLongDisplayTextConverter}}"/>
+              </DataTemplate>
+            </c:ListBoxEx.ItemTemplate>
+          </c:ListBoxEx>
+        </usp:FilterContentControl>
+      </DataTemplate>
+
+      <Style x:Key="{x:Static sp:MiniOrderBookView.RowStyleKey}" TargetType="ListBoxItem" BasedOn="{StaticResource DIYGridRowStyle}">
+        <Style.Triggers>
+          <MultiDataTrigger>
+            <MultiDataTrigger.Conditions>
+              <Condition Binding="{Binding IsSelected, RelativeSource={RelativeSource Self}}" Value="False"/>
+              <Condition Binding="{Binding status}" Value="{uc:Enum Working, Type=order:OrderStatus}"/>
+            </MultiDataTrigger.Conditions>
+            <MultiDataTrigger.Setters>
+              <Setter Property="Background" Value="{x:Static Member=working_order_background_brush, MemberType={uc:Nested uc:BTSColors.Orders}}"/>
+            </MultiDataTrigger.Setters>
+          </MultiDataTrigger>
+        </Style.Triggers>
+      </Style>
+      <DataTemplate x:Key="{x:Static sp:MiniOrderBookView.RowTemplateKey}">
+        <sp:MiniOrderBookRowView/>
+      </DataTemplate>
+    </ResourceDictionary>
+  </UserControl.Resources>
+  <AdornerDecorator>
+    <Border BorderThickness="4" BorderBrush="LightGray">
+    <Grid>
+      <Grid.RowDefinitions>
+        <RowDefinition />
+        <RowDefinition Height="Auto"/>
+      </Grid.RowDefinitions>
+      <c:DIYGrid
+      x:Name="_grid"
+      Grid.Row="0"
+      Columns="{Binding columns}"
+      CurrentRow="{Binding current_row, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
+      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}"
+      RowsHorizontalScrollBarVisibility="Collapsed"
+      RowHeight="20"
+    >
+        <c:DIYGrid.Resources>
+          <ResourceDictionary>
+            <SolidColorBrush x:Key="TreeViewItem.TreeArrow.Static.Checked.Fill" Color="#FF595959"/>
+            <SolidColorBrush x:Key="TreeViewItem.TreeArrow.Static.Checked.Stroke" Color="#FF262626"/>
+            <SolidColorBrush x:Key="TreeViewItem.TreeArrow.MouseOver.Stroke" Color="#FF27C7F7"/>
+            <SolidColorBrush x:Key="TreeViewItem.TreeArrow.MouseOver.Fill" Color="#FFCCEEFB"/>
+            <SolidColorBrush x:Key="TreeViewItem.TreeArrow.MouseOver.Checked.Stroke" Color="#FF1CC4F7"/>
+            <SolidColorBrush x:Key="TreeViewItem.TreeArrow.MouseOver.Checked.Fill" Color="#FF82DFFB"/>
+            <PathGeometry x:Key="TreeArrow" Figures="M0,0 L0,6 L6,0 z"/>
+            <SolidColorBrush x:Key="TreeViewItem.TreeArrow.Static.Fill" Color="#FFFFFFFF"/>
+            <SolidColorBrush x:Key="TreeViewItem.TreeArrow.Static.Stroke" Color="#FF818181"/>
+            <Style x:Key="{x:Static sp:OrderBookView.ExpandCollapseToggleStyleKey}" TargetType="{x:Type ToggleButton}">
+              <Setter Property="Focusable" Value="False"/>
+              <Setter Property="Width" Value="16"/>
+              <Setter Property="Height" Value="16"/>
+              <Setter Property="Template">
+                <Setter.Value>
+                  <ControlTemplate TargetType="{x:Type ToggleButton}">
+                    <Border Background="Transparent" Height="16" Padding="0,5,5,5" Width="16">
+                      <Path x:Name="ExpandPath" Data="{StaticResource TreeArrow}" Fill="{StaticResource TreeViewItem.TreeArrow.Static.Fill}" Stroke="{StaticResource TreeViewItem.TreeArrow.Static.Stroke}">
+                        <Path.RenderTransform>
+                          <RotateTransform Angle="135" CenterY="3" CenterX="3"/>
+                        </Path.RenderTransform>
+                      </Path>
+                    </Border>
+                    <ControlTemplate.Triggers>
+                      <Trigger Property="IsChecked" Value="True">
+                        <Setter Property="RenderTransform" TargetName="ExpandPath">
+                          <Setter.Value>
+                            <RotateTransform Angle="180" CenterY="3" CenterX="3"/>
+                          </Setter.Value>
+                        </Setter>
+                        <Setter Property="Fill" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.Static.Checked.Fill}"/>
+                        <Setter Property="Stroke" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.Static.Checked.Stroke}"/>
+                      </Trigger>
+                      <Trigger Property="IsMouseOver" Value="True">
+                        <Setter Property="Stroke" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Stroke}"/>
+                        <Setter Property="Fill" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Fill}"/>
+                      </Trigger>
+                      <MultiTrigger>
+                        <MultiTrigger.Conditions>
+                          <Condition Property="IsMouseOver" Value="True"/>
+                          <Condition Property="IsChecked" Value="True"/>
+                        </MultiTrigger.Conditions>
+                        <Setter Property="Stroke" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Checked.Stroke}"/>
+                        <Setter Property="Fill" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Checked.Fill}"/>
+                      </MultiTrigger>
+                    </ControlTemplate.Triggers>
+                  </ControlTemplate>
+                </Setter.Value>
+              </Setter>
+            </Style>
+            <Style TargetType="{x:Type ToolTip}">
+              <Style.Triggers>
+                <Trigger Property="Content" Value="{x:Static sys:String.Empty}">
+                  <Setter Property="Visibility" Value="Collapsed" />
+                </Trigger>
+                <Trigger Property="Content" Value="{x:Null}">
+                  <Setter Property="Visibility" Value="Collapsed" />
+                </Trigger>
+              </Style.Triggers>
+            </Style>
+          </ResourceDictionary>
+        </c:DIYGrid.Resources>
+        <c:DIYGrid.InputBindings>
+          <!--<MouseBinding MouseAction="LeftDoubleClick" Command="{x:Static c:DIYGrid.DefaultRowCommand}"/>
+          <KeyBinding Key="Return" Command="{x:Static c:DIYGrid.DefaultRowCommand}"/> -->
+        </c:DIYGrid.InputBindings>
+        <c:DIYGrid.CommandBindings>
+          <CommandBinding
+          Command="{x:Static c:DIYGrid.DefaultRowCommand}"
+          Executed="{x:Static c:DIYGrid.DefaultRowActionExecuted}"
+          CanExecute="{x:Static c:DIYGrid.DefaultRowActionCanExecute}"
+        />
+        </c:DIYGrid.CommandBindings>
+      </c:DIYGrid>
+    </Grid>
+    </Border>
+  </AdornerDecorator>
+</UserControl>
@@ -0,0 +1,26 @@
+using mbts.ui.controls;
+using System.Windows.Controls;
+
+namespace mbts.spark {
+   internal partial class MiniOrderBookView : UserControl {
+      // IMPORTANT: these enums are stored as strings in the general-purpose GridColumnSettings proto, and are used to ID THE COLUMNS!
+      // Do NOT RENAME them!  However, if you must, be sure to write an IShellWindowMigrationRule or something to account for backwards compatability.
+      public enum Columns { Security, Symbol, Time, LastChange, User, Account, Exchange, TimeInForce, OrderType, SubType, Side, Size, Price, Filled, AvgFilled, LastPrice, Status, LastMessage, SecurityKey, OrderKey, ParentKey, Cancel, EditableQty, EditablePrice }
+      public const string
+         SubTypeFilterTemplateKey = "SubTypeFilterTemplate",
+         ExpandCollapseToggleStyleKey = "ExpandCollapseToggleStyle",
+         RowStyleKey = "RowStyle",
+         RowTemplateKey = "RowTemplateKey",
+         CVRowStyleKey = "CVRowStyle",
+         CVRowTemplateKey = "CVRowTemplateKey";
+
+      public MiniOrderBookView(OrderBookVM vm) {
+         InitializeComponent();
+         DataContext = vm;
+      }
+   }
+
+   class MiniOrderBookRowView : DIYGrid.HighPerformanceRow<OrderBookRowVM, OrderBookView.Columns> {
+      public MiniOrderBookRowView() : base() { }
+   }
+}
@@ -194,6 +194,10 @@ namespace mbts.spark {
            // quantity
            Add(qty_column = new SizeColumn(
               new UIntMinMax<OrderRecordTuple>(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<OrderRecordTuple>(ort => ort.order.filled(), nameof(OrderBookRowVM.filled_quantity))));
@@ -209,6 +213,10 @@ namespace mbts.spark {
                  nameof(OrderBookRowVM.price)),
               DataGridFilterKnownTemplates.DoubleMinMax,
               _wrap_comparer(r => r.price)));
+            // edit price column
+            // not usually part of the main order book, but it's useful to add it
+            // rather than debugging the popup window
+            //Add(edit_price_column = new OrderBookVM.EditablePriceColumn());
            // avg filled price
            Add(avg_price_column = new SimpleTextColumn<DoubleMinMaxState>(
               Columns.AvgFilled,
@@ -291,6 +299,7 @@ namespace mbts.spark {

         public event Action filter_changed;

+         public CancelColumn cancel_column { get; }
         public SecurityColumn security_column { get; }
         public SimpleTextColumn<string[]> symbol_column { get; }
         public SimpleTextColumn<TimeFilterTuple> time_created_column { get; }
@@ -303,7 +312,9 @@ namespace mbts.spark {
         public SimpleTextColumn<OrderSubType[]> sub_type_column { get; }
         public SideColumn side_column { get; }
         public SizeColumn qty_column { get; }
+         public EditableQtyColumn edit_qty_column { get; }
         public SimpleTextColumn<DoubleMinMaxState> price_column { get; }
+         public EditablePriceColumn edit_price_column { get; }
         public FilledColumn filled_qty_column { get; }
         public SimpleTextColumn<DoubleMinMaxState> last_price_column { get; }
         public SimpleTextColumn<DoubleMinMaxState> avg_price_column { get; }
@@ -509,7 +520,7 @@ namespace mbts.spark {
            : base(key, header, get_text, sort_prop, 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, RowHeight,
+            CellRender.draw_text(dc, _get_glyph_context(row), font_size, _get_text(row), position, row_height,
               font_brush, null, horizontal_alignment, VerticalAlignment.Center, DefaultCellPadding);
      }

@@ -519,7 +530,7 @@ namespace mbts.spark {
            : base(Columns.Side, "B/S", r => r.side.ToString(), nameof(OrderBookRowVM.side), DefaultColumnWidths.Side, filter, DataGridFilterKnownTemplates.EnumValues, _wrap_comparer(r => r.side)) { }

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

@@ -530,7 +541,7 @@ namespace mbts.spark {
         }

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

@@ -541,7 +552,7 @@ namespace mbts.spark {
         }

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

@@ -640,6 +651,8 @@ namespace mbts.spark {
            grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
            grid.Children.Add(toggle_button);
            grid.Children.Add(security_view);
+            grid.HorizontalAlignment = HorizontalAlignment.Center;
+            grid.VerticalAlignment = VerticalAlignment.Center;
            //
            var border = new Border { Child = grid };
            CellRender.set_background_animation_bindings(border, nameof(OrderBookRowVM.security));
@@ -651,6 +664,88 @@ namespace mbts.spark {
            base.OnSortDirectionChanged(new_value);
         }
      }
+
+      public class CancelColumn : FrameworkElementColumnBase<Columns> {
+         readonly BindingBase _command_binding;
+
+         public CancelColumn(string command_property) : base(Columns.Cancel) {
+            id = key.ToString();
+            Header = DefaultColumnHeaders.Cancel;
+            _command_binding = new Binding(command_property);
+         }
+
+         public override FrameworkElement view_factory() {
+            var grid = new Grid() {
+               HorizontalAlignment = HorizontalAlignment.Center,
+               VerticalAlignment = VerticalAlignment.Center,
+            };
+            var l1 = new System.Windows.Shapes.Line() {
+               StrokeThickness = 1,
+               Stroke = Brushes.White,
+               X1 = 0.5,
+               Y1 = 0.5,
+               X2 = 7,
+               Y2 = 7
+            };
+            var l2 = new System.Windows.Shapes.Line() {
+               StrokeThickness = 1,
+               Stroke = Brushes.White,
+               X1 = 0.5,
+               Y1 = 7,
+               X2 = 7,
+               Y2 = 0.5
+            };
+            grid.Children.Add(l1);
+            grid.Children.Add(l2);
+
+            var button = new Button() {
+               Content = grid,
+               Background = Brushes.Red,
+               Foreground = Brushes.White,
+               Margin = new Thickness(2),
+               VerticalAlignment = VerticalAlignment.Center,
+               Height = 14,
+               Width = 14
+            };
+
+            button.SetBinding(Button.CommandProperty, _command_binding);
+            return button;
+         }
+      }
+
+      public class EditableQtyColumn:FrameworkElementColumnBase<Columns> {
+
+         public EditableQtyColumn() : base(Columns.EditableQty) {
+            id = key.ToString();
+            Header = "Qty";
+            Width = 64;
+         }
+
+         public override FrameworkElement view_factory() {
+            var tick_up_down = new TickUpDownNullableUIntCommit();
+            tick_up_down.SetBinding(TickUpDownNullableUIntCommit.SourceValueProperty, nameof(OrderBookRowVM.prospective_quantity));
+            tick_up_down.SetBinding(TickUpDownNullableUIntCommit.OnCommitProperty, nameof(OrderBookRowVM.modify_order_quantity));
+            return tick_up_down;
+         }
+      }
+
+      public class EditablePriceColumn : FrameworkElementColumnBase<Columns> {
+
+         public EditablePriceColumn() : base(Columns.EditablePrice) {
+            id = key.ToString();
+            Header = "Price";
+            Width = 96;
+         }
+
+         public override FrameworkElement view_factory() {
+            var price_up_down = new PriceEntryCommitControl();
+            price_up_down.SetBinding(PriceEntryCommitControl.SourceValueProperty, nameof(OrderBookRowVM.prospective_price));
+            price_up_down.SetBinding(PriceEntryCommitControl.SourceContractSpecProperty, nameof(OrderBookRowVM.contract_spec));
+            price_up_down.SetBinding(PriceEntryCommitControl.OnCommitProperty, nameof(OrderBookRowVM.modify_order_price));
+            return price_up_down;
+         }
+      }
+
      #endregion

      static class RenderUtils {
@@ -14,6 +14,8 @@ namespace mbts.spark {
   class OrderBookRowCollection : ObservableCollection<OrderBookRowVM> {
      static readonly IEqualityComparer<INode<OrderBookRowVM>> _node_equality_comparer = EqualityComparer.Create<INode<OrderBookRowVM>, uint>(n => n.value.order_key);
      readonly Func<OrderRecordTuple, OrderBookRowVM> _row_factory;
+      /// Critical: Any and all row mutations <see cref="OrderBookRowVM"/> must be executed through <see cref="SortedTree{T, TKey}.TryReplace(TKey, Func{T, T})"/>.
+      /// Mutations can change the sort-position of a row, and <see cref="_tree"/> will be broken if its elements aren't properly sorted (it relies heavily on binary-search logic).
      SortedTree<OrderBookRowVM, uint> _tree;
      IComparer<OrderBookRowVM> _comparer;
      Func<OrderRecordTuple, bool> _filter;
@@ -6,6 +6,9 @@ using mbts.ui;
 using mbts.ui.controls;
 using mbts.ui.shell;
 using System;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
 using System.Windows.Input;

 namespace mbts.spark {
@@ -13,15 +16,34 @@ namespace mbts.spark {
      const string _unknown_security_price_format_string = "0.#########";
      const int _unknown_security_price_num_fractional_digits = 9;
      readonly OrderBookVM _owner;
-      IRaiseCanExecuteChangedCommand _show_order_modify_cmd, _toggle_expanded_cmd;
-      bool _is_parent, _is_expanded;
+      IRaiseCanExecuteChangedCommand _show_order_modify_cmd, _toggle_expanded_cmd, _cancel_cmd, _modify_order_quantity, _modify_order_price;
+      bool _is_parent, _is_expanded, _is_selected;
      int _depth_level;
      SecurityMD? _security_md => order_tuple.security_md;
-     
-      public OrderBookRowVM(OrderBookVM owner, OrderRecordTuple order_tuple) {
+      
+      // for mini-ob 
+      uint _prospective_quantity;
+      double _prospective_price;
+
+
+      public OrderBookRowVM(OrderBookVM owner, OrderRecordTuple order_tuple, bool is_expanded) {
         _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?.TryRaiseCanExecuteChanged();
+         modify_order_price?.TryRaiseCanExecuteChanged();
+      }
+
+      protected override void Dispose(bool disposing) {
+         this.invalidated -= OrderBookRowVM_invalidated;
+         base.Dispose(disposing);
      }

      public event Action invalidated;
@@ -34,6 +56,7 @@ namespace mbts.spark {
      public uint parent_order_key => order.ParentKey;
      public uint security_key => order.security_key();
      public SecurityImmutable? security => _security_md.security();
+      public ContractSpecificationImmutable? contract_spec => security.spec_or_default();
      public string security_text => security.display_name();
      public Venue exchange => _security_md.exchange();
      public string symbol => _security_md.symbol();
@@ -72,6 +95,29 @@ 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);
+      }
+      public uint prospective_quantity {
+         get => _prospective_quantity;
+         set {
+            if (Set(ref _prospective_quantity, value)) {
+               RaisePropertyChanged(nameof(is_qty_dirty));
+            }
+         }
+      }
+      public double prospective_price {
+         get => _prospective_price;
+         set {
+            if (Set(ref _prospective_price, value)) {
+               RaisePropertyChanged(nameof(is_price_dirty));
+            }
+         }
+      }
+      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));
@@ -79,6 +125,38 @@ namespace mbts.spark {
      ICommand DIYGrid.IActionableRowVM.default_command => _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));
+
+      public ICommand modify_order_quantity => _modify_order_quantity ??
+         (_modify_order_quantity = new DelegateCommand(
+            (desired_quantity) => {
+               _owner.modify_order_quantity(this, (uint)desired_quantity);
+               _unselect_me();
+            },
+            (desired_quantity) => 
+            (desired_quantity != null && this.status == OrderStatus.Working && (uint)desired_quantity != this.quantity)
+            || is_qty_dirty
+            )
+         );
+
+      public ICommand modify_order_price => _modify_order_price ??
+         (_modify_order_price = new DelegateCommand(
+            (desired_price) => {
+               _owner.modify_order_price(this, (double)desired_price);
+               _unselect_me();
+            },
+            (desired_price) =>
+            (desired_price != null && this.status == OrderStatus.Working && (double)desired_price != this.price)
+            || is_price_dirty
+            )
+      );
+
+      private void _unselect_me() {
+         this.is_selected = false;
+         _owner.current_row = null;
+      }
+
      // These fns present a way for the orderbook to avoid noisy, intermittent collection changes during "Expand/Collapse All" ops,
      // when incremental changes are ignored in favor of a full reset, after 'is_expanded' is updated for all rows.
      internal void expand_internal() => Set(ref _is_expanded, true);
@@ -103,6 +181,14 @@ namespace mbts.spark {
         // however, the order-type and security cells DO use databindings - if these cells have changed, the PropertyChanged event must be raised regardless of whether or not invalidated is raised
         if (old_order.order_type() != order.order_type())
            RaisePropertyChanged(nameof(order_type), nameof(order_metadata));
+         if (old_order.quantity() != order.quantity()) {
+            RaisePropertyChanged(nameof(quantity));
+            RaisePropertyChanged(nameof(is_qty_dirty));
+         }
+         if (old_order.price() != order.price()) {
+            RaisePropertyChanged(nameof(price));
+            RaisePropertyChanged(nameof(is_price_dirty));
+         }
         if (!had_security && _security_md.HasValue) {
            RaisePropertyChanged(nameof(security), nameof(security_text));
            // need to raise invalidated to refresh the price cells (the security.ContractSpec determines how they are formatted - Ticks!)
@@ -16,6 +16,7 @@ using System.Collections.ObjectModel;
 using System.Collections.Specialized;
 using System.Linq;
 using System.Reactive.Linq;
+using System.Threading.Tasks;
 using System.Windows.Controls;
 using System.Windows.Input;
 using static bts.shell.OrderBookWindowFactory;
@@ -33,44 +34,84 @@ namespace mbts.spark {
      readonly IWindowSettingsManager<OrderBookGridSettings> _settings_manager;
      readonly List<IDisposable> _resources;
      OrderBookStartupData _state;
+      bool _is_row_collection_populated;

-      public OrderBookVM(IObservable<string> owner_title, IBus bus, INotificationService notification_service, OrdersModel model, IWindowSettingsManager<OrderBookGridSettings> settings_manager) {
+      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;
         _settings_manager = settings_manager;
         _columns = new OrderBookColumnCollection(bus, model, model.on_order_securities.Select(u => (u.added.Values.Select(smd => smd.security), u.removed.Values.Select(smd => smd.security))));
-         _row_collection = new OrderBookRowCollection(ort => new OrderBookRowVM(this, ort), _columns.get_sorting_data().comparer) { filter = _columns.get_filter() };
+         // 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 OrderBookRowCollection(ort => new OrderBookRowVM(this, ort, rows_are_initially_expanded), _columns.get_sorting_data().comparer) { filter = _columns.get_filter() };
+         _row_collection.CollectionChanged += _row_collection_CollectionChanged; 
         _current_row = backing<OrderBookRowVM>(nameof(current_row));
         _columns.filter_changed += on_filter_changed;
         collapse_all_rows_command = new DelegateCommand(_row_collection.collapse_all);
         expand_all_rows_command = new DelegateCommand(_row_collection.expand_all);
-         grid_settings_manager = _create_grid_settings_manager(owner_title, bus, notification_service, model, rows, columns);
+         grid_settings_manager = _create_grid_settings_manager(owner_title, bus, notification_service, model, rows, core_columns);
         _resources = new List<IDisposable> {
            model.on_order_tuples_table.OnDispatcher().Subscribe(_row_collection.update),
-            settings_manager.subscribe_current().OnDispatcher().Subscribe(grid_settings_manager),
            grid_settings_manager,
            Disposable.Create(() => {
               _columns.filter_changed -= on_filter_changed;
+               _row_collection.CollectionChanged -= _row_collection_CollectionChanged;
               Disposable.dispose(_row_collection);
            }),
            _columns
         };
+         if (settings_manager != null) {
+            _resources.Add(settings_manager.subscribe_current().OnDispatcher().Subscribe(grid_settings_manager));
+         }
         void on_filter_changed() => _row_collection.filter = _columns.get_filter();
      }

+      private void _row_collection_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e) {
+         is_row_collection_populated = _row_collection.Count != 0;
+      }
+
      public event Action<OrderRecordImmutable?> selected_order_changed;
      public event Action<bool> OnDisposed;

-      public ObservableCollection<DIYGrid.ColumnBase> columns => _columns;
+      public ObservableAppendCollection<DIYGrid.ColumnBase> columns { get; }
+      public ObservableCollection<DIYGrid.ColumnBase> core_columns => _columns;
      public ObservableCollection<OrderBookRowVM> rows => _row_collection;
-      public OrderBookRowVM current_row { get => _current_row.Value; set => _current_row.Value = value ?? _selected_rows.FirstOrDefault(); }
+      public OrderBookRowVM current_row {
+         get => _current_row.Value;
+         set {
+            _current_row.Value = value;
+            // this is so that when the current_row is set to null from 
+            // the row_vm, we propagate the change up to the OrderBookWindow
+            // so that the cancel and modify commands can_execute is updated.
+            // Note that this is really only for if/when the edit_xxx columns
+            // from the mini-ob are present in regular orderbook, else this is
+            // a no-op.
+            selected_order_changed?.Invoke(current_order);
+         }
+      }
      public OrderRecordImmutable? current_order => current_row?.order;
      public IEnumerable<OrderRecordImmutable> selected_orders => _selected_rows.Select(r => r.order);
      public _GridSettingsManager grid_settings_manager { get; }
      public ICommand collapse_all_rows_command { get; }
      public ICommand expand_all_rows_command { get; }

+      public bool is_row_collection_populated {
+         get => _is_row_collection_populated;
+         set => Set(ref _is_row_collection_populated, value);
+      }
+
      public void row_selection_changed(SelectionChangedEventArgs e) {
+         if (e.RemovedItems != null) {
+            foreach (var row_vm in e.RemovedItems.Cast<OrderBookRowVM>()) {
+               row_vm.is_selected = false;
+            }
+         }
+         if (e.AddedItems != null) { 
+            foreach (var row_vm in e.AddedItems.Cast<OrderBookRowVM>()) {
+               row_vm.is_selected = true;
+            }
+         }
+
         RowSelectionHelper.apply_changes(_selected_rows, e);
         selected_order_changed?.Invoke(current_order);
      }
@@ -131,6 +172,15 @@ namespace mbts.spark {
      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 modify_order_quantity(OrderBookRowVM row, uint size) =>
+         _bus.post(SparkTags.UpdateOrder, (row.order_key, row.price, size));
+
+      internal void modify_order_price(OrderBookRowVM row, double price) =>
+         _bus.post(SparkTags.UpdateOrder, (row.order_key, price, row.quantity));
+
      internal void on_expanded_changed(OrderBookRowVM row) {
         using (_row_collection.defer_refresh(true)) {
            if (row.is_expanded) {
@@ -187,7 +237,8 @@ namespace mbts.spark {
               return pvm;
            },
            (gen, anims) => new OrderBookGridSettings(gen, anims.Select(a => new OrderRecordTuplePredicateAnimations(a.predicate_builder, a.cell_animations, a.row_animations, a.sound_notifications))),
-            notification_service.data_cache, col_settings_flags);
+            (notification_service == null) ? null : notification_service.data_cache,
+            col_settings_flags);
      }

      static OrderRecordTuplePredicate.PredicateTypeOneofCase _corresponding_predicate_type(Columns col) {
@@ -5,7 +5,7 @@ namespace mbts.spark {
   internal partial class OrderBookView : UserControl {
      // IMPORTANT: these enums are stored as strings in the general-purpose GridColumnSettings proto, and are used to ID THE COLUMNS!
      // Do NOT RENAME them!  However, if you must, be sure to write an IShellWindowMigrationRule or something to account for backwards compatability.
-      public enum Columns { Security, Symbol, Time, LastChange, User, Account, Exchange, TimeInForce, OrderType, SubType, Side, Size, Price, Filled, AvgFilled, LastPrice, Status, LastMessage, SecurityKey, OrderKey, ParentKey }
+      public enum Columns { Security, Symbol, Time, LastChange, User, Account, Exchange, TimeInForce, OrderType, SubType, Side, Size, Price, Filled, AvgFilled, LastPrice, Status, LastMessage, SecurityKey, OrderKey, ParentKey, Cancel, EditableQty, EditablePrice }
      public const string
         SubTypeFilterTemplateKey = "SubTypeFilterTemplate",
         ExpandCollapseToggleStyleKey = "ExpandCollapseToggleStyle",
@@ -14,8 +14,6 @@ namespace mbts.spark {
         CVRowStyleKey = "CVRowStyle",
         CVRowTemplateKey = "CVRowTemplateKey";

-      public const double RowHeight = 17;
-
      public OrderBookView(OrderBookVM vm) {
         InitializeComponent();
         DataContext = vm;
@@ -23,6 +21,6 @@ namespace mbts.spark {
   }

   class OrderBookRowView : DIYGrid.HighPerformanceRow<OrderBookRowVM, OrderBookView.Columns> {
-      public OrderBookRowView() : base(OrderBookView.RowHeight) { }
+      public OrderBookRowView() : base() { }
   }
 }
@@ -131,7 +131,7 @@ namespace mbts.spark {
                  return _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.general.with(_vm.columns.Select(c => c.create())),
+                     s.general.with(_vm.core_columns.Select(c => c.create())),
                     this.observe_title()
                  );
               }
@@ -167,11 +167,9 @@ namespace mbts.spark {
      }

      private void _vm_selected_order_changed(OrderRecordImmutable? e) {
-         if (e.HasValue) {
            _modify_order_command.raiseCanExecuteChanged();
            _cancel_selected_orders_command.raiseCanExecuteChanged();
            _recreate_selected_orders_command.raiseCanExecuteChanged();
-         }
      }
   }
 }
@@ -90,6 +90,8 @@ namespace bts.shell {
         public static OrderBookGridSettings DefaultGrid => new OrderBookGridSettings(_default_general_grid);

         static GridSettings _default_general_grid => GridSettings.Default.with(DefaultColumns.all, DefaultColumns.sorting_criterion);
+         public static GridSettings default_mini_grid => 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);
@@ -110,7 +112,7 @@ namespace bts.shell {
            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);
            public static GridColumnSettings last_message => new GridColumnSettings(Columns.LastMessage.ToString(), "Last Message", width: DIYGrid.DefaultColumnWidths.LastMessage);
-            public static GridColumnSettings security_key => new GridColumnSettings(Columns.SecurityKey.ToString(), DIYGrid.DefaultColumnHeaders.SecurityKey, width: DIYGrid.DefaultColumnWidths.SecurityKey);
+            public static GridColumnSettings security_key => new GridColumnSettings(Columns.SecurityKey.ToString(), DIYGrid.DefaultColumnHeaders.SecurityKey, is_visible: false, width: DIYGrid.DefaultColumnWidths.SecurityKey);
            public static GridColumnSettings order_key => new GridColumnSettings(Columns.OrderKey.ToString(), DIYGrid.DefaultColumnHeaders.OrderKey, width: DIYGrid.DefaultColumnWidths.OrderKey);
            public static GridColumnSettings parent_key => new GridColumnSettings(Columns.ParentKey.ToString(), "Parent Key", width: DIYGrid.DefaultColumnWidths.ParentKey);

@@ -145,7 +147,23 @@ namespace bts.shell {
                  yield return parent_key;
               }
            }
-         } 
+
+            private static HashSet<GridColumnSettings> _mini_mode_columns_to_hide = new HashSet<GridColumnSettings> {
+               time_created, exchange, sub_type, quantity, price, avg_price, last_price, status, last_message, security_key, order_key, parent_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;
+                     }
+                  }
+               }
+            }
+         }
      }

      [ProtoContract]
@@ -25,6 +25,8 @@ namespace mbts.ui.spark {
      public DataTemplate JoinOrderTemplate { get; set; }
      public DataTemplate TopOrderTemplate { get; set; }
      public DataTemplate CoverOrderTemplate { get; set; }
+      public DataTemplate OCOOrderTemplate { get; set; }
+      public DataTemplate PricerOrderTemplate { get; set; }
      public DataTemplate OffsetOrderTemplate { get; set; }
      public DataTemplate TriggerOrderTemplate { get; set; }
      public DataTemplate IcebergOrderTemplate { get; set; }
@@ -43,6 +45,8 @@ namespace mbts.ui.spark {
               case CustomOrderDefinition.CustomOneofCase.Join: return JoinOrderTemplate;
               case CustomOrderDefinition.CustomOneofCase.Top: return TopOrderTemplate;
               case CustomOrderDefinition.CustomOneofCase.Cover: return CoverOrderTemplate;
+               case CustomOrderDefinition.CustomOneofCase.Oco : return OCOOrderTemplate;
+               case CustomOrderDefinition.CustomOneofCase.Pricer: return PricerOrderTemplate;
               case CustomOrderDefinition.CustomOneofCase.Offset: return OffsetOrderTemplate;
               case CustomOrderDefinition.CustomOneofCase.Trigger: return TriggerOrderTemplate;
               case CustomOrderDefinition.CustomOneofCase.Iceberg: return IcebergOrderTemplate;
@@ -139,13 +139,13 @@ namespace mbts.spark {
            tif => time_in_forces.Contains(tif));
          _dispose = Disposable.Create(() => _order_type.Changed -= on_selected_order_type_changed);
         // local methods
-         IOrderTypeVM create_order_type_vm(CustomOrderDefinitionImmutable cd, string id, string display_name) {
+         IOrderTypeVM create_order_type_vm(CustomOrderDefinitionImmutable? cd, string id, string display_name) {
            IOrderTypeVM vm = null;
-            if(cd.CustomCase == CustomOrderDefinition.CustomOneofCase.Dynamic)
-               vm = OrderTypeVMFactory.create(cd.CustomCase, id, display_name, model, security_md_source, cd.Dynamic.DynamicOrderType);        
+            if(cd?.CustomCase == CustomOrderDefinition.CustomOneofCase.Dynamic)
+               vm = OrderTypeVMFactory.create(cd.Value.CustomCase, id, display_name, model, security_md_source, cd.Value.Dynamic.DynamicOrderType);        
            else
-               vm = OrderTypeVMFactory.create(cd.CustomCase, id, display_name, model, security_md_source);
-            vm.load_from(cd);
+               vm = OrderTypeVMFactory.create(cd.Value.CustomCase, id, display_name, model, security_md_source);
+            vm.load_from(cd.Value);
            return vm;
         }
         InlineUserProperty<IOrderTypeVM> get_order_type_vm_prop(InlineOrderProperties p) {
@@ -126,6 +126,8 @@ namespace mbts.spark
               return _child_order_choices;
            }
         }
+         
+         public bool has_child => _order_def_tags.Any();

         public IOrderTypeVM child_order
         {
@@ -0,0 +1,257 @@
+using bts.api;
+using bts.api.orderman;
+using mbts.ui;
+using mbts.ui.utility;
+using mbts.utils;
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Linq;
+using System.Reactive.Linq;
+using static bts.api.orderman.CustomOrderDefinition;
+
+namespace mbts.spark
+{
+   static partial class OrderTypeVMFactory
+   {
+      class InlineOCOOrderProperties
+      {
+         public InlineOCOOrderProperties(OrderTemplateHeader selected_child_order_type, IReadOnlyCollection<OrderTemplateHeader> child_order_types)
+         {
+            ExceptionAssert.InvalidOperation.That(child_order_types.Contains(selected_child_order_type), $"Child order type {selected_child_order_type} is not in child_order_types");
+            this.selected_child_order_type = new InlineUserProperty<OrderTemplateHeader>(selected_child_order_type, true);
+            this.child_order_types = new InlineUserProperty<IReadOnlyCollection<OrderTemplateHeader>>(child_order_types, true);
+
+            var othertype = CustomOneofCase.Limit;
+            this.selected_other_order_type = new InlineUserProperty<OrderTemplateHeader>(new OrderTemplateHeader(othertype), true);
+            this.other_order_types = new InlineUserProperty<IReadOnlyCollection<OrderTemplateHeader>>(child_order_types, true);
+
+            other_ticks = new InlineUserProperty<int>(1, false);
+            other_side = new InlineUserProperty<bts.api.RelativeSide>(bts.api.RelativeSide.Same, false);
+         }
+         public readonly InlineUserProperty<OrderTemplateHeader> selected_child_order_type;
+         public readonly InlineUserProperty<IReadOnlyCollection<OrderTemplateHeader>> child_order_types;
+         public readonly InlineUserProperty<OrderTemplateHeader> selected_other_order_type;
+         public readonly InlineUserProperty<IReadOnlyCollection<OrderTemplateHeader>> other_order_types;
+
+         public readonly InlineUserProperty<int> other_ticks;
+         public readonly InlineUserProperty<bts.api.RelativeSide> other_side;
+
+      }
+
+      class OCOOrderVM : OrderTypeVMBase<OCOOrderDefinition>, IHierarchicalOrderTypeVM, IDisposable
+      {
+         readonly IObservable<SecurityMD> _security_md_source;
+         SecurityImmutable? _security;
+         ObservableCollection<OrderTemplateHeader> _order_types = new ObservableCollection<OrderTemplateHeader>();
+         ObservableAutoWrapper<IOrderTypeVM, OrderTemplateHeader> _child_order_choices;
+         InlineOCOOrderProperties _inline_props;
+         IOrderTypeVM _child_order;
+         IDisposable _dispose, _child_order_errors_sub;
+
+         ObservableAutoWrapper<IOrderTypeVM, OrderTemplateHeader> _other_order_choices;
+         IOrderTypeVM _other_order;
+         IDisposable _other_order_errors_sub;
+
+         public int other_ticks { get; set; } = 1;
+         public bts.api.RelativeSide other_side { get; set; } = bts.api.RelativeSide.Same;
+
+         public OCOOrderVM(OrdersModel model, IObservable<SecurityMD> security_md_source, string id, string display_name)
+            : this(model, security_md_source, security_md_source.Select(smd =>
+            new InlineOCOOrderProperties(new OrderTemplateHeader(model.factory.default_order_type(smd.security)), model.factory.default_order_types(smd.security).Select(t => new OrderTemplateHeader(t)).ToList())), id, display_name)
+         { }
+
+         public OCOOrderVM(OrdersModel model, IObservable<SecurityMD> security_md_source,
+                            IObservable<InlineOCOOrderProperties> inline_properties, string id, string display_name) : base(model, id, display_name)
+         {
+            _security_md_source = security_md_source;
+            _dispose = Disposable.Create(
+               security_md_source.OnDispatcher()
+               .Subscribe(smd => _security = smd.security),
+               inline_properties.OnDispatcher()
+               .Subscribe(p =>
+               {
+                  if (_order_types.Count == 0 || p.child_order_types.force_override)
+                  {
+                     _order_types.SetItems(p.child_order_types.value);
+                  }
+                  if (_child_order_choices != null && (_child_order == null || p.selected_child_order_type.force_override))
+                  {
+                     _select_child_order(p.selected_child_order_type.value.key.type);
+                  }
+                  if (_other_order_choices != null && (_other_order == null || p.selected_other_order_type.force_override))
+                  {
+                     _select_other_order(p.selected_other_order_type.value.key.type);
+                  }
+                  if (p.other_ticks.force_override)
+                  {
+                     other_ticks = p.other_ticks.value;
+                     RaisePropertyChanged(nameof(other_ticks));
+                  }
+                  if (p.other_side.force_override)
+                  {
+                     other_side = p.other_side.value;
+                     RaisePropertyChanged(nameof(other_side));
+                  }
+                  _inline_props = p;
+                  _validate();
+               })
+            );
+            _validate();
+         }
+
+         public override void assign_to(CustomOrderDefinition value)
+         {
+            if (_child_order == null)
+               _select_child_order(model.factory.default_order_type(_security.Value, true));
+            if (_other_order == null )
+               _select_other_order(model.factory.default_order_type(_security.Value, true));
+            _validate();
+            if (!HasErrors)
+            {
+               var i = factory.oco_order();
+               i.OtherTicks = other_ticks;
+               i.OtherSide = other_side;
+               child_order.assign_to(i.Child);
+               if (other_order != null)
+                  other_order.assign_to(i.Other);
+               value.Oco = i;
+            }
+         }
+
+         public IEnumerable<bts.api.RelativeSide> other_side_types => EnumHelper.get_values_except<bts.api.RelativeSide>(bts.api.RelativeSide.Undefined);
+
+         public ICollection<IOrderTypeVM> child_order_types
+         {
+            get
+            {
+               if (_child_order_choices == null)
+                  _child_order_choices = new ObservableAutoWrapper<IOrderTypeVM, OrderTemplateHeader>(_order_types, ot => create(ot.key.type, ot.key.name, ot.display_name, model, _security_md_source));
+               return _child_order_choices;
+            }
+         }
+
+         public ICollection<IOrderTypeVM> other_order_types
+         {
+            get
+            {
+               if (_other_order_choices == null)
+                  _other_order_choices = new ObservableAutoWrapper<IOrderTypeVM, OrderTemplateHeader>(_order_types, ot => create(ot.key.type, ot.key.name, ot.display_name, model, _security_md_source));
+               return _other_order_choices;
+            }
+         }
+
+         public IOrderTypeVM child_order
+         {
+            get
+            {
+               init();
+               return _child_order;
+            }
+            set
+            {
+               Disposable.dispose(ref _child_order_errors_sub);
+               _child_order = value;
+               _child_order?.init();
+               if (_child_order is INotifyDataErrorInfo ndei)
+               {
+                  ndei.ErrorsChanged += on_errors_changed;
+                  void on_errors_changed(object s, DataErrorsChangedEventArgs e) =>
+                     _validate();
+                  _child_order_errors_sub = Disposable.Create(() => ndei.ErrorsChanged -= on_errors_changed);
+               }
+               _validate();
+               RaisePropertyChanged(nameof(child_order));
+            }
+         }
+
+         public IOrderTypeVM other_order
+         {
+            get
+            {
+               init();
+               return _other_order;
+            }
+            set
+            {
+               Disposable.dispose(ref _other_order_errors_sub);
+               _other_order = value;
+               _other_order?.init();
+               if (_other_order is INotifyDataErrorInfo ndei)
+               {
+                  ndei.ErrorsChanged += on_errors_changed;
+                  void on_errors_changed(object s, DataErrorsChangedEventArgs e) =>
+                     _validate();
+                  _other_order_errors_sub = Disposable.Create(() => ndei.ErrorsChanged -= on_errors_changed);
+               }
+               _validate();
+               RaisePropertyChanged(nameof(other_order));
+            }
+         }
+
+         public void Dispose()
+         {
+            Disposable.dispose(ref _dispose);
+            if (_child_order_choices != null)
+               _child_order_choices.OfType<IDisposable>().DisposeAll();
+            if (_other_order_choices != null)
+               _other_order_choices.OfType<IDisposable>().DisposeAll();
+         }
+
+         public override void init()
+         {
+            if (_child_order == null && _security.HasValue)
+               _select_child_order();
+            if (_other_order == null && _security.HasValue)
+               _select_other_order();
+            _validate();
+         }
+
+         void _select_child_order()
+         {
+            CustomOneofCase ot = _inline_props != null && _inline_props.selected_child_order_type.has_value ?
+               _inline_props.selected_child_order_type.value.key.type :
+               model.factory.default_order_type(_security.Value, true);
+            _select_child_order(ot);
+         }
+
+         void _select_child_order(CustomOneofCase ot)
+         {
+            _child_order = child_order_types.FirstOrDefault(vm => vm.order_type == ot);
+            if (_child_order == null)
+               _child_order = child_order_types.FirstOrDefault();
+            RaisePropertyChanged(nameof(child_order));
+         }
+
+         void _select_other_order()
+         {
+            CustomOneofCase ot = _inline_props != null && _inline_props.selected_other_order_type.has_value ?
+               _inline_props.selected_other_order_type.value.key.type :
+               model.factory.default_order_type(_security.Value, true);
+            _select_other_order(ot);
+         }
+
+         void _select_other_order(CustomOneofCase ot)
+         {
+            _other_order = other_order_types.FirstOrDefault(vm => vm.order_type == ot);
+            if (_other_order == null)
+               _other_order = other_order_types.FirstOrDefault();
+            RaisePropertyChanged(nameof(other_order));
+         }
+
+
+         void _validate()
+         {
+            if (_child_order == null || (_child_order is INotifyDataErrorInfo ndei && ndei.HasErrors))
+               set_error(nameof(child_order), string.Empty, true);
+            else clear_error(nameof(child_order));
+
+            if ((_other_order == null ) || (_other_order is INotifyDataErrorInfo hdei && hdei.HasErrors))
+               set_error(nameof(other_order), string.Empty, true);
+            else clear_error(nameof(other_order));
+
+         }
+      }
+   }
+}
@@ -15,11 +15,12 @@ namespace mbts.spark {
      public static IOrderTypeVM stop(OrdersModel model, string id, string display_name) => new StopOrderVM(model, id, display_name);
      public static IOrderTypeVM stop_limit(OrdersModel model, IObservable<SecurityMD> security_md_source, string id, string display_name) => new StopLimitOrderVM(model, security_md_source, id, display_name);
      public static IOrderTypeVM time_box(OrdersModel model, IObservable<SecurityMD> security_md_source, string id, string display_name) => new TimeBoxOrderVM(model, security_md_source, id, display_name);
-      public static IOrderTypeVM tick(OrdersModel model, IObservable<SecurityMD> security_md_source, string id, string display_name) => new TickOrderVM(model, security_md_source, id, display_name);
      public static IOrderTypeVM lean(OrdersModel model, IObservable<SecurityMD> security_md_source, string id, string display_name) => new LeanOrderVM(model, security_md_source, id, display_name);
      public static IOrderTypeVM join(OrdersModel model, IObservable<SecurityMD> security_md_source, string id, string display_name) => new JoinOrderVM(model, security_md_source, id, display_name);
      public static IOrderTypeVM top(OrdersModel model, IObservable<SecurityMD> security_md_source, string id, string display_name) => new TopOrderVM(model, security_md_source, id, display_name);
      public static IOrderTypeVM cover(OrdersModel model, IObservable<SecurityMD> security_md_source, string id, string display_name) => new CoverOrderVM(model, security_md_source, id, display_name);
+      public static IOrderTypeVM oco(OrdersModel model, IObservable<SecurityMD> security_md_source, string id, string display_name) => new OCOOrderVM(model, security_md_source, id, display_name);
+      public static IOrderTypeVM pricer(OrdersModel model, IObservable<SecurityMD> security_md_source, string id, string display_name) => new PricerOrderVM(model, security_md_source, id, display_name);
      public static IOrderTypeVM offset(OrdersModel model, IObservable<SecurityMD> security_md_source, string id, string display_name) => new OffsetOrderVM(model, security_md_source, id, display_name);
      public static IOrderTypeVM trigger(OrdersModel model, IObservable<SecurityMD> security_md_source, string id, string display_name) => new TriggerOrderVM(model, security_md_source, id, display_name);
      public static IOrderTypeVM iceberg(OrdersModel model, IObservable<SecurityMD> security_md_source, string id, string display_name) => new IcebergOrderVM(model, security_md_source, id, display_name);
@@ -34,11 +35,12 @@ namespace mbts.spark {
            case CustomOneofCase.Stop: return stop(model, id, display_name);
            case CustomOneofCase.StopLimit: return stop_limit(model, security_md_source, id, display_name);
            case CustomOneofCase.TimeBox: return time_box(model, security_md_source, id, display_name);
-            case CustomOneofCase.Tick: return tick(model, security_md_source, id, display_name);
            case CustomOneofCase.Lean: return lean(model, security_md_source, id, display_name);
            case CustomOneofCase.Join: return join(model, security_md_source, id, display_name);
            case CustomOneofCase.Top: return top(model, security_md_source, id, display_name);
            case CustomOneofCase.Cover: return cover(model, security_md_source, id, display_name);
+            case CustomOneofCase.Oco : return oco(model, security_md_source, id, display_name);
+            case CustomOneofCase.Pricer: return pricer(model, security_md_source, id, display_name);
            case CustomOneofCase.Offset: return offset(model, security_md_source, id, display_name);
            case CustomOneofCase.Trigger: return trigger(model, security_md_source, id, display_name);
            case CustomOneofCase.Iceberg: return iceberg(model, security_md_source, id, display_name);
@@ -15,52 +15,42 @@ namespace mbts.spark
 {
   static partial class OrderTypeVMFactory 
   {
-      class InlineTickOrderProperties 
+      class InlinePricerOrderProperties 
      {
-         public InlineTickOrderProperties (OrderTemplateHeader selected_child_order_type, IReadOnlyCollection<OrderTemplateHeader> child_order_types) 
+         public InlinePricerOrderProperties (OrderTemplateHeader selected_child_order_type, IReadOnlyCollection<OrderTemplateHeader> child_order_types) 
         {
            ExceptionAssert.InvalidOperation.That(child_order_types.Contains(selected_child_order_type), $"Child order type {selected_child_order_type} is not in child_order_types");
            this.selected_child_order_type = new InlineUserProperty<OrderTemplateHeader>(selected_child_order_type, true);
            this.child_order_types = new InlineUserProperty<IReadOnlyCollection<OrderTemplateHeader>>(child_order_types, true);
-            tick_offset_on_deploy = new InlineUserProperty<uint>(0, false);
-            cross_threshold = new InlineUserProperty<bts.spark.QuantityMeasure>(
-                              new bts.spark.QuantityMeasure() { Ratio = 1.0,  Absolute = 1}, false);
-            cross_ticks = new InlineUserProperty<uint>(0, false);
-            max_chase_ticks = new InlineUserProperty<uint>(10, false);
-            detach_on_toward = new InlineUserProperty<bool>(true, false);
+            price_offset_ticks = new InlineUserProperty<int>(0, false);
+            price_factor = new InlineUserProperty<double>(0, false);
         }
         public readonly InlineUserProperty<OrderTemplateHeader> selected_child_order_type;
         public readonly InlineUserProperty<IReadOnlyCollection<OrderTemplateHeader>> child_order_types;
         
-         public readonly InlineUserProperty<uint> tick_offset_on_deploy;
-         public readonly InlineUserProperty<bts.spark.QuantityMeasure> cross_threshold;
-         public readonly InlineUserProperty<uint> cross_ticks;
-         public readonly InlineUserProperty<uint> max_chase_ticks;
-         public readonly InlineUserProperty<bool> detach_on_toward;
+         public readonly InlineUserProperty<int> price_offset_ticks;
+         public readonly InlineUserProperty<double> price_factor;
      }

-      class TickOrderVM : OrderTypeVMBase<TickOrderDefinition>, IHierarchicalOrderTypeVM, IDisposable 
+      class PricerOrderVM : OrderTypeVMBase<PricerOrderDefinition>, IHierarchicalOrderTypeVM, IDisposable 
      {
         readonly IObservable<SecurityMD> _security_md_source;
         SecurityImmutable? _security;
         ObservableCollection<OrderTemplateHeader> _order_types = new ObservableCollection<OrderTemplateHeader>();
         ObservableAutoWrapper<IOrderTypeVM, OrderTemplateHeader> _child_order_choices;
-         InlineTickOrderProperties _inline_props;
+         InlinePricerOrderProperties _inline_props;
         IOrderTypeVM _child_order;
         IDisposable _dispose, _child_order_errors_sub;
         
-         public uint tick_offset_on_deploy { get; set; } = 0;
-         public bts.spark.QuantityMeasure cross_threshold { get; set; } = new bts.spark.QuantityMeasure() { Ratio = 1.0, Absolute = 1 };
-         public uint cross_ticks { get; set; } = 0;
-         public uint max_chase_ticks { get; set; } = 10;
-         public bool detach_on_toward { get; set; } = true;         
+         public int price_offset_ticks { get; set; } = 0;
+         public double price_factor { get; set; } = 1.0;

-         public TickOrderVM(OrdersModel model, IObservable<SecurityMD> security_md_source, string id, string display_name)
+         public PricerOrderVM(OrdersModel model, IObservable<SecurityMD> security_md_source, string id, string display_name)
            : this(model, security_md_source, security_md_source.Select(smd =>
-            new InlineTickOrderProperties(new OrderTemplateHeader(model.factory.default_order_type(smd.security)), model.factory.default_order_types(smd.security).Select(t => new OrderTemplateHeader(t)).ToList())), id, display_name) { }
+            new InlinePricerOrderProperties(new OrderTemplateHeader(model.factory.default_order_type(smd.security)), model.factory.default_order_types(smd.security).Select(t => new OrderTemplateHeader(t)).ToList())), id, display_name) { }

-         public TickOrderVM(OrdersModel model, IObservable<SecurityMD> security_md_source,
-                            IObservable<InlineTickOrderProperties> inline_properties, string id, string display_name) : base(model, id, display_name) 
+         public PricerOrderVM(OrdersModel model, IObservable<SecurityMD> security_md_source,
+                            IObservable<InlinePricerOrderProperties> inline_properties, string id, string display_name) : base(model, id, display_name) 
         {
            _security_md_source = security_md_source;
            _dispose = Disposable.Create(
@@ -76,31 +66,16 @@ namespace mbts.spark
                  {
                     _select_child_order(p.selected_child_order_type.value.key.type);
                  }                  
-                  if (p.tick_offset_on_deploy.force_override) 
+                  if (p.price_offset_ticks.force_override) 
                  {
-                     tick_offset_on_deploy = p.tick_offset_on_deploy.value;
-                     RaisePropertyChanged(nameof(tick_offset_on_deploy));
+                     price_offset_ticks = p.price_offset_ticks.value;
+                     RaisePropertyChanged(nameof(price_offset_ticks));
                  }
-                  if (p.cross_threshold.force_override)
+                  if (p.price_factor.force_override)
                  {
-                     cross_threshold = p.cross_threshold.value;
-                     RaisePropertyChanged(nameof(cross_threshold));
-                  }
-                  if (p.cross_ticks.force_override)
-                  {
-                     cross_ticks = p.cross_ticks.value;
-                     RaisePropertyChanged(nameof(cross_ticks));
-                  }
-                  if (p.max_chase_ticks.force_override)
-                  {
-                     max_chase_ticks = p.max_chase_ticks.value;
-                     RaisePropertyChanged(nameof(max_chase_ticks));
-                  }
-                  if (p.detach_on_toward.force_override)
-                  {
-                     detach_on_toward = p.detach_on_toward.value;
-                     RaisePropertyChanged(nameof(detach_on_toward));
-                  }                                                                        
+                     price_factor = p.price_factor.value;
+                     RaisePropertyChanged(nameof(price_factor));
+                  }                  
                  _inline_props = p;
                  _validate();
               })
@@ -115,14 +90,11 @@ namespace mbts.spark
            _validate();
            if (!HasErrors) 
            {
-               var i = factory.tick_order();
-               i.TickOffsetOnDeploy = tick_offset_on_deploy;
-               i.CrossThreshold = cross_threshold;
-               i.CrossTicks = cross_ticks;
-               i.MaxChaseTicks = max_chase_ticks;
-               i.DetachOnToward = detach_on_toward;
+               var i = factory.pricer_order();
+               i.PriceOffsetTicks = price_offset_ticks;
+               i.PriceFactor = price_factor;
               child_order.assign_to(i.Child);
-               value.Tick = i;
+               value.Pricer = i;
            }
         }         

@@ -19,7 +19,8 @@ namespace mbts.spark {
               var so = model.factory.spreader_order();
               so.Security = s.CloneToMutable();
               so.ExecutionStrategy = strategy.CloneToMutable();
-               return new InlineUserProperty<SpreaderOrderDefinitionImmutable>(so, true);
+               var soi = new SpreaderOrderDefinitionImmutable(so);
+               return new InlineUserProperty<SpreaderOrderDefinitionImmutable>(soi, true);
            })), id, display_name) { }

         public SpreaderOrderVM(
@@ -44,8 +44,8 @@ namespace mbts.spark {
         _dynamic_helper = dynamic_helper;
         var scheduler = ThreadPoolScheduler.Instance;
         var interval = TimeSpan.FromMilliseconds(100);
-         on_orders = _service.subscribei_orders().Naggle(interval, scheduler).PermissionFilter(admin_model).Table().Cache();
-         on_positions = _position_service.subscribei_position_data().Naggle(interval, scheduler).PermissionFilter(admin_model).Table().Cache();
+         on_orders = _service.subscribei_orders().Naggle(interval, scheduler).PermissionFilter(admin_model.on_admin_data).Table().Cache();
+         on_positions = _position_service.subscribei_position_data().Naggle(interval, scheduler).PermissionFilter(admin_model.on_admin_data).Table().Cache();
         working_orders = 
            on_orders.Scan(
               ImmutableDictionary<uint,OrderRecordImmutable>.Empty, 
@@ -55,7 +55,7 @@ namespace mbts.spark {
         on_order_tuples = order_record_tuple_source.subscribe_incremental_update();
         on_order_tuples_table = order_record_tuple_source.subscribe_incremental_table_update();
         on_order_securities = order_record_tuple_source.subscribe_order_securities();
-         on_fills = _service.subscribei_fills().Naggle(interval, scheduler).PermissionFilter(admin_model).Table().Cache();
+         on_fills = _service.subscribei_fills().Naggle(interval, scheduler).PermissionFilter(admin_model.on_admin_data).Table().Cache();
         _activity = new OrderActivitySummarizer(bus, on_orders);
         on_fill_tuples = FillTupleSource.create_observable(bus.subscribe(SparkTags.SecuritiesTag), on_orders, on_fills);
         _security_orders_demuxer = new TableUpdateDemuxer<OrderRecordImmutable, uint, uint>(o => o.Key, o => o.security_key());
@@ -93,10 +93,13 @@ namespace mbts.spark {
      #endregion

      #region Input
-      public async Task<uint?> send_order(OrderDefinitionImmutable order, double price, uint size) {
-         var result = (await send_order_get_error(order, price, size));
-         _activity.on_send_order(order, price, size, result.key, result.error);
-         return result.key;
+      public async Task<uint?> send_order(OrderDefinitionImmutable? order, double price, uint size) {
+         if (order.HasValue) {
+            var result = (await send_order_get_error(order.Value, price, size));
+            _activity.on_send_order(order.Value, price, size, result.key, result.error);
+            return result.key;
+         }
+         return 0;
      }

      async Task<(uint? key, string error)> send_order_get_error(OrderDefinitionImmutable order, double price, uint size) {
@@ -31,7 +31,7 @@
    <Reference Include="WindowsBase" />
    <Reference Include="Microsoft.CSharp" />
    <Reference Include="System.ComponentModel.Composition" />
-    <PackageReference Include="Google.Protobuf" Version="3.4.0" />
+    <PackageReference Include="Google.Protobuf" Version="3.6.1" />
    <PackageReference Include="IronPython" Version="2.7.7" />
    <PackageReference Include="NAudio" Version="1.8.4" />
    <PackageReference Include="Newtonsoft.Json" Version="10.0.3" />
@@ -54,6 +54,7 @@
  <ItemGroup>
    <None Remove="Sounds\game_sound_correct.wav" />
    <None Remove="Sounds\whistle.wav" />
+    <None Remove="view\Controls\TickUpDown\TickUpDownNullableUIntCommit.xaml" />
    <None Remove="view\Shell\Workspaces\WorkspacesView.xaml" />
  </ItemGroup>
  <ItemGroup>
@@ -71,11 +72,20 @@
    <Folder Include="view\Extensions\ItemsControl\ObservableItemsSource\" />
  </ItemGroup>
  <ItemGroup>
+    <Compile Update="view\Controls\TickUpDown\TickUpDownNullableUIntCommit.xaml.cs">
+      <SubType>Code</SubType>
+    </Compile>
    <Compile Update="view\Shell\Workspaces\WorkspacesDialogView.xaml.cs">
      <SubType>Code</SubType>
    </Compile>
  </ItemGroup>
  <ItemGroup>
+    <None Update="Modules\Trading\OrderBook\MiniOrderBook\MiniOrderBookView.xaml">
+      <Generator>MSBuild:Compile</Generator>
+    </None>
+    <None Update="Modules\Trading\OrderBook\MiniOrderBook\OrderBookView.xaml">
+      <Generator>MSBuild:Compile</Generator>
+    </None>
    <None Update="view\Controls\DIYGrid\Settings\SimpleGridSettingsDialog.xaml">
      <Generator>MSBuild:Compile</Generator>
    </None>
@@ -3,6 +3,7 @@ using bts.api.orderman;
 using bts.shell;
 using mbts.spark;
 using mbts.ui;
+using mbts;
 using System;
 using System.Collections.Generic;

@@ -211,6 +211,8 @@ namespace mbts.ui {
         public static BTSColor lean_order { get { return new BTSColor(255, 170, 210); } }
         public static BTSColor join_order { get { return new BTSColor(200, 171, 232); } }
         public static BTSColor cover_order { get { return new BTSColor(134, 232, 224); } }
+         public static BTSColor oco_order { get { return new BTSColor(110, 94, 11); } }
+         public static BTSColor pricer_order { get { return new BTSColor(170, 132, 150); } }
         public static BTSColor trigger_order { get { return new BTSColor(172, 255, 179); } }
         public static BTSColor off_order { get { return new BTSColor(0x8a, 0x00, 0x5f); } }//8a005f
         public static BTSColor top_order { get { return new BTSColor(0xdd, 0x7a, 0x27); } }//dd7a27
@@ -218,9 +218,7 @@ namespace mbts
         private Func<T, T, int> _comparer_func;
         public DelegateComparer(Func<T, T, int> comparer_func) { _comparer_func = comparer_func; }
         public int Compare(T x, T y) { return _comparer_func(x, y); }
-      }
-
-      public static void ignore(this Task t) { }
+      }      

      public static Google.Protobuf.WellKnownTypes.Timestamp ToGoogleTime(this DateTime self) {
         return Google.Protobuf.WellKnownTypes.Timestamp.FromDateTime(self);
@@ -22,12 +22,12 @@ namespace mbts.ui.settings
      readonly PersistenceService _persist;

      [ImportingConstructor]
-      public UISettingsFactory(UserService login, [Import("settings")] PersistenceService persist) {
+      public UISettingsFactory(AuthService login, [Import("settings")] PersistenceService persist) {
         _persist = persist;
         _users = get_users(login);
      }

-      async Task<User[]> get_users(UserService login) {
+      async Task<User[]> get_users(AuthService login) {
         var users = await login.get_users_async(null);
         if (users.success) return users.value.Users.ToArray();
         else return new User[0];
@@ -120,7 +120,7 @@ namespace mbts.persist
      public IObservable<IEnumerable<PersistResult<T>>> subscribe<T>(string ns, string pattern) {
         var re = new Regex(pattern);
         return _persist
-            .subscribe_ns(new NamespaceSubArgs() { Ns = uns(ns) })
+            .subscribe_ns(uns(ns))
            .Select(update =>
               update.added
                  .Where(item => re.IsMatch(item.Key))
@@ -51,7 +51,7 @@ namespace bts.proto {
   static class DateTimeProviderExtensions {
      public static DateTime get_date_time(this DateTimeProvider dtp) {
         switch (dtp.mode) {
-            case DateTimeProviderMode.CMEOpen: return MarketSchedule.get_cme_gen_open();
+            case DateTimeProviderMode.CMEOpen: return MarketSchedule.get_start_of_trading_day();
            case DateTimeProviderMode.Today: return DateTime.Today;
            case DateTimeProviderMode.Explicit:
            default: return dtp.explicit_date.GetValueOrDefault();
@@ -9,6 +9,7 @@ using System.Globalization;
 using System.Linq;
 using System.Windows;
 using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
 using System.Windows.Data;
 using System.Windows.Media;
 using FontFamily = System.Windows.Media.FontFamily;
@@ -38,6 +39,7 @@ namespace mbts.ui.controls {
      CustomOrderDefinition.CustomOneofCase _parent_algo_type;
      (Point p1, Point p2, Point p3) _current_triangle_vertices;
      StreamGeometry _triangle_geometry;
+      Popup _popup;


      static Badge() {
@@ -181,6 +183,7 @@ namespace mbts.ui.controls {
         _has_multiple_orders_at_level = HasMultipleOrdersAtLevel;
         _is_hedge_order = IsHedgeOrder;
         _gcr.glyph_context = GlyphContext.create(FontFamily, FontWeight);
+         _popup = Popup;
      }

      public static readonly DependencyProperty TextLinesProperty =
@@ -264,6 +267,19 @@ namespace mbts.ui.controls {
            (b, v) => b._is_hedge_order = v,
            false);

+      public Popup Popup {
+         get { return (Popup)GetValue(PopupProperty); }
+         set { SetValue(PopupProperty, value); }
+      }
+
+      public static readonly DependencyProperty PopupProperty =
+      WPFHelper.create_dp<Popup, Badge>(
+         nameof(Popup),
+         FrameworkPropertyMetadataOptions.AffectsRender,
+         (b, v) => b._popup = v,
+         null);
+
+
      protected override Size ArrangeOverride(Size finalSize) => finalSize;

      protected override Size MeasureOverride(Size availableSize) {
@@ -1,16 +1,21 @@
-using System;
+using mbts.ui.shell;
+using System;
 using System.Reactive.Linq;
 using System.Reactive.Subjects;

 namespace mbts.spark {
   class CellProperty<T> : ISubject<T, (T oldval, T newval)> {
      readonly Func<T, string> _format;
+      readonly IRaiseNotifyPropertyChanged _owner;
+      readonly string _prop_name;
      string _text;

-      public CellProperty(T initial_value = default)
-         : this(t => t.ToString(), initial_value) { }
+      public CellProperty(IRaiseNotifyPropertyChanged owner, string prop_name, T initial_value = default)
+         : this(owner, prop_name, t => t.ToString(), initial_value) { }

-      public CellProperty(Func<T, string> format, T initial_value = default) {
+      public CellProperty(IRaiseNotifyPropertyChanged owner, string prop_name, Func<T, string> format, T initial_value = default) {
+         _owner = owner;
+         _prop_name = prop_name;
         _format = format;
         value = initial_value;
      }
@@ -24,6 +29,7 @@ namespace mbts.spark {
         if (!value.Equals(this.value)) {
            OnNext(value);
            dirty = true;
+            _owner.raise_notify_property_changed(_prop_name);
         }
      }

@@ -36,7 +36,6 @@ namespace mbts.ui.controls {
            Symbol = 78,
            Time = 112,
            TimeInForce = 47,
-            TradeKey = 76,
            User = 53,
            Aggressor = 80,
            Volume = 74,
@@ -71,7 +70,6 @@ namespace mbts.ui.controls {
            ImpliedSize = "Qty (I)",
            Symbol = "Symbol",
            TimeInForce = "TIF",
-            TradeKey = "Trade Key",
            User = "User",
            Time = "Time",
            Aggressor = "Aggressor",
@@ -97,7 +95,8 @@ namespace mbts.ui.controls {
            DayPnL = "Day PnL",
            TotalNetPos = "Total Net Pos",
            TotalPnL = "Total PnL",
-            PnLPrice = "PnL Price";
+            PnLPrice = "PnL Price",
+            Cancel = "Cancel";
      }

      public interface IKeyedColumn<TColKey> {
@@ -139,6 +139,7 @@ namespace mbts.ui.controls {
      public static readonly Thickness
         DefaultCellPadding = new Thickness(4, 2, 4, 2),
         AnimatableCellPadding = new Thickness(8, 2, 4, 2);
+      public static readonly Visibility DefaultRowsHorizontalScrollBarVisibility = Visibility.Visible;

      #region RoutedCommands
      public static readonly RoutedCommand SortCommand = new RoutedCommand(), DefaultRowCommand = new RoutedCommand();
@@ -695,6 +696,14 @@ namespace mbts.ui.controls {

      public static readonly DependencyProperty SelectionModeProperty = ListBox.SelectionModeProperty.AddOwner(typeof(DIYGrid));

+      public Visibility RowsHorizontalScrollBarVisibility {
+         get { return (Visibility)GetValue(RowsHorizontalScrollBarVisibilityProperty); }
+         set { SetValue(RowsHorizontalScrollBarVisibilityProperty, value); }
+      }
+
+      public static readonly DependencyProperty RowsHorizontalScrollBarVisibilityProperty = DependencyProperty.Register(
+         nameof(RowsHorizontalScrollBarVisibility), typeof(Visibility), typeof(DIYGrid), new PropertyMetadata(DefaultRowsHorizontalScrollBarVisibility));
+
      #endregion

      // Internal Methods
@@ -62,7 +62,8 @@
    <Setter Property="ColumnHeaderStyle">
      <Setter.Value>
        <Style TargetType="GridViewColumnHeader">
-          <Setter Property="Background" Value="{mbts:BTSColor header}"/>
+          <!-- Background - note that we're settings this property on the containing stackpanel in which the GridViewHeaderRowPresenter resides -->
+          <Setter Property="Background" Value="{x:Null}"/>
          <Setter Property="Foreground" Value="{mbts:BTSColor header_text}"/>
          <Setter Property="BorderBrush" Value="{mbts:BTSColor header}"/>
          <Setter Property="BorderThickness" Value="0,1,1,0"/>
@@ -301,7 +302,9 @@
                          HorizontalScrollBarVisibility="Hidden" 
                          VerticalScrollBarVisibility="Hidden" 
                          x:Name="_header_scroll_viewer">
-              <StackPanel>
+              <!-- setting the bg color for this stackpanel is a work-around for the vertical white lines that appear on high-dpi displays between some columns -->
+              <!-- in reality, there is some high dpi rounding thing going on, but that's a battle for another day -->
+              <StackPanel Background="{mbts:BTSColor Name=header}">
                <!-- We don't need super headers over the fixed columns -->
                <StackPanel Orientation="Horizontal" x:Name="_super_headers" />
                <GridViewHeaderRowPresenter x:Name="_header_scroll" AllowsColumnReorder="False" ColumnHeaderContainerStyle="{TemplateBinding ColumnHeaderStyle}" UseLayoutRounding="True" />
@@ -332,7 +335,7 @@
                </ControlTemplate>
              </bts:DIYGridRowsPresenter.Template>
            </bts:DIYGridRowsPresenter>
-            <ScrollBar Grid.Row="3" Grid.Column="1" Orientation="Horizontal" LargeChange="10" x:Name="_scroll_horiz" />
+            <ScrollBar Grid.Row="3" Grid.Column="1" Orientation="Horizontal" LargeChange="10" x:Name="_scroll_horiz" Visibility="{TemplateBinding RowsHorizontalScrollBarVisibility}" />

            <!-- todo: All edit controls go in a canvas - edit api is called with an edit type. Hide all controls -->
            <!--  This stole hours of my life. The Text binding down there used to be 'value' and I was encountering -->
@@ -1,4 +1,5 @@
 using bts.proto;
+using bts.utils;
 using ProtoBuf;
 using System;
 using System.ComponentModel;
@@ -18,7 +19,7 @@ namespace mbts.ui.settings {
   }

   [ProtoContract]
-   class GridColumnSettings {
+   class GridColumnSettings : IEquatable<GridColumnSettings> {
      const bool
         _default_is_visible = true,
         _default_is_collapsed = false;
@@ -103,5 +104,43 @@ namespace mbts.ui.settings {
            width ?? this.width,
            horizontal_alignment ?? this.horizontal_alignment,
            horizontal_offset ?? this.horizontal_offset);
+
+      public bool Equals(GridColumnSettings other) =>
+         other != null &&
+         id == other.id &&
+         display_name == other.display_name &&
+         is_visible == other.is_visible &&
+         is_collapsed == other.is_collapsed &&
+         font_weight_override.Equals(other.font_weight_override) &&
+         font_color_override.Equals(other.font_color_override) &&
+         width == other.width &&
+         horizontal_alignment == other.horizontal_alignment &&
+         horizontal_offset == other.horizontal_offset &&
+         display_name == other.display_name;
+
+      public override bool Equals(object obj) =>
+         Equals(obj as GridColumnSettings);
+
+      public override int GetHashCode() =>
+         EqualityComparer.aggregate_hash(
+            id.GetHashCode(),
+            display_name.GetHashCode(),
+            is_visible.GetHashCode(),
+            is_collapsed.GetHashCode(),
+            font_weight_override.GetHashCode(),
+            font_color_override.GetHashCode(),
+            width.GetHashCode(),
+            horizontal_alignment.GetHashCode(),
+            horizontal_offset.GetHashCode(),
+            display_name.GetHashCode()
+            );
+
+      public override string ToString() {
+         return $"id: {id} display_name: {display_name}";
+      }
+
+
+
   }
+
 }
@@ -126,13 +126,15 @@ namespace mbts.ui {
            col.set_fallback_font_params(new FontFamily(grid.font_family), grid.font_size, grid.font_color.rgb_color(), grid.font_weight);
         _predicate_animations_data = value.predicate_animations;
         _animation_defs.clear();
-         foreach (var pa in _predicate_animations_data) {
-            var predicate = pa.predicate_builder.create_predicate(_arg);
-            foreach (var s in pa.sound_notifications) {
-               _notification_subs.Add(_notification_service.link(predicate, s));
-            }
-            if (pa.predicate_builder is INotificationPredicateBuilder<TRowData, TPredicateBuilderArg> tpb && tpb.is_toast_enabled) {
-               _notification_subs.Add(_notification_service.link(tpb.create_notification_predicate(_arg)));
+         if (_notification_service != null && _arg != null) {
+            foreach (var pa in _predicate_animations_data) {
+               var predicate = pa.predicate_builder.create_predicate(_arg);
+               foreach (var s in pa.sound_notifications) {
+                  _notification_subs.Add(_notification_service.link(predicate, s));
+               }
+               if (pa.predicate_builder is INotificationPredicateBuilder<TRowData, TPredicateBuilderArg> tpb && tpb.is_toast_enabled) {
+                  _notification_subs.Add(_notification_service.link(tpb.create_notification_predicate(_arg)));
+               }
            }
         }
         // ** in the unfortunate event that we botch backwards compatability, and the columns don't bear a 1:1 relationship with the column-settings
@@ -14,7 +14,7 @@ namespace mbts.spark.filters {
      TimeFilterMode _mode;
      TimeTextTuple _begin, _end;
      DateTime? _begin_dt, _end_dt;
-      readonly DateTime _cme_open = MarketSchedule.get_cme_gen_open();
+      readonly DateTime _cme_open = MarketSchedule.get_start_of_trading_day();

      public TimeFilterVM(Func<TRow, DateTime> get_row_val, string prop_name) : base(get_row_val, prop_name) =>
         _set_default_values();
@@ -34,9 +34,11 @@ namespace bts.view.controls {
      private void any_button_click(object sender, RoutedEventArgs e) {
         Close();
      }
-      internal static void Show(ErrorReportService srv, ErrorReport report) {
-         var window = new SupportRequestWindow(new SupportRequestVM(srv, report));
-         window.Show();
+      internal static void Show(ErrorReportService srv, ErrorReportImmutable? report) {
+         if (report.HasValue) {
+            var window = new SupportRequestWindow(new SupportRequestVM(srv, report.Value));
+            window.Show();
+         }
      }
   }

@@ -166,51 +166,6 @@
                      </Grid>
                    </DataTemplate>
                  </usp:OrderModificationTemplateSelector.TimeBoxOrderTemplate>
-                  <usp:OrderModificationTemplateSelector.TickOrderTemplate>
-                    <DataTemplate>
-                      <Grid>
-                        <Grid.RowDefinitions>
-                          <RowDefinition/>
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition/>
-                        </Grid.RowDefinitions>
-                        <Grid.ColumnDefinitions>
-                          <ColumnDefinition Width="Auto"/>
-                          <ColumnDefinition Width="12"/>
-                          <ColumnDefinition/>
-                        </Grid.ColumnDefinitions>
-                        <TextBlock Grid.Row="1" VerticalAlignment="Center">Cross Thresh</TextBlock>
-                        <uag:QuantityMeasureControl Grid.Row="1" Grid.Column="2" QuantityMeasure="{Binding cross_threshold}"/>
-
-                        <TextBlock Grid.Row="3" VerticalAlignment="Center">Cross Ticks</TextBlock>
-                        <c:TickUpDownUInt Grid.Row="3" Grid.Column="2" Value="{Binding cross_ticks}"/>
-                        <TextBlock Grid.Row="5" VerticalAlignment="Center">Max Chase Ticks</TextBlock>
-                        <c:TickUpDownUInt Grid.Row="5" Grid.Column="2" Value="{Binding max_chase_ticks}"/>
-                        <CheckBox Grid.Row="7" Grid.Column="2" VerticalAlignment="Center" Margin="0,0,0,0" IsChecked="{Binding detach_on_toward}">Detach on Toward</CheckBox>
-                        <TextBlock Grid.Row="9" VerticalAlignment="Center">Initial Tick Offset</TextBlock>
-                        <c:TickUpDownUInt Grid.Row="9" Grid.Column="2" Value="{Binding tick_offset_on_deploy}"/>
-                        <TextBlock Grid.Row="11">Child</TextBlock>
-                        <uag:OrderDetailsPopupControl
-                          Grid.Row="11" Grid.Column="2"
-                          IsOpen="{Binding child_order.editable_properties_open, FallbackValue=False}"
-                          ItemsSource="{Binding child_order_types}"
-                          SelectedItem="{Binding child_order}"
-                          HasEditableProperties="{Binding child_order.has_editable_properties, FallbackValue=False}"
-                        />
-                      </Grid>
-                    </DataTemplate>
-                  </usp:OrderModificationTemplateSelector.TickOrderTemplate>
                  <usp:OrderModificationTemplateSelector.LeanOrderTemplate>
                    <DataTemplate>
                      <Grid>
@@ -379,16 +334,16 @@
                            Orientation="Horizontal"
                            Grid.Row="1"
                            >
-                          <TextBlock VerticalAlignment="Center" >Hedge Ticks</TextBlock>
-                          <c:HelpButton Margin="4,0,0,0" ToolTip="This is the number of ticks to offset the hedge." />
+                          <TextBlock VerticalAlignment="Center" >Profit Ticks</TextBlock>
+                          <c:HelpButton Margin="4,0,0,0" ToolTip="This is the number of ticks in your favor to offset the profit/hedge order." />
                        </StackPanel>
                        <c:TickUpDownInt Grid.Row="1" Grid.Column="2" Value="{Binding hedge_ticks}"/>
                        <StackPanel
                            Orientation="Horizontal"
                            Grid.Row="3"
                            >
-                          <TextBlock VerticalAlignment="Center">Hedge</TextBlock>
-                          <c:HelpButton Margin="4,0,0,0" ToolTip="This is the type of the hedge order to send for each fill of Child Order." />
+                          <TextBlock VerticalAlignment="Center">Profit Order</TextBlock>
+                          <c:HelpButton Margin="4,0,0,0" ToolTip="This is the type of the profit/hedge order to send for each fill of Child Order." />
                        </StackPanel>
                        <uag:OrderDetailsPopupControl
                          Grid.Row="3" Grid.Column="2"
@@ -415,6 +370,68 @@
                      </Grid>
                    </DataTemplate>
                  </usp:OrderModificationTemplateSelector.CoverOrderTemplate>
+                  <usp:OrderModificationTemplateSelector.OCOOrderTemplate>
+                    <DataTemplate>
+                      <Grid>
+                        <Grid.RowDefinitions>
+                          <RowDefinition/>
+                          <RowDefinition Height="Auto"/>
+                          <RowDefinition Height="4" />
+                          <RowDefinition Height="Auto"/>
+                          <RowDefinition Height="4" />
+                          <RowDefinition Height="Auto"/>
+                          <RowDefinition Height="4" />
+                          <RowDefinition Height="Auto"/>
+                          <RowDefinition Height="4" />                          
+                          <RowDefinition/>
+                        </Grid.RowDefinitions>
+                        <Grid.ColumnDefinitions>
+                          <ColumnDefinition Width="Auto"/>
+                          <ColumnDefinition Width="12"/>
+                          <ColumnDefinition/>
+                        </Grid.ColumnDefinitions>
+                        <StackPanel Orientation="Horizontal" Grid.Row="1" >
+                          <TextBlock VerticalAlignment="Center" >Stop Ticks</TextBlock>
+                          <c:HelpButton Margin="4,0,0,0" ToolTip="This is the number of ticks away from the main order to start the 'stop' order." />
+                        </StackPanel>
+                        <c:TickUpDownInt Grid.Row="1" Grid.Column="2" Value="{Binding other_ticks}"/>
+                        <StackPanel Orientation="Horizontal" Grid.Row="3" >
+                          <TextBlock VerticalAlignment="Center" >Stop Side</TextBlock>
+                          <c:HelpButton Margin="4,0,0,0" ToolTip="The Side of the 'stop' order" />
+                        </StackPanel>
+                        <ComboBox Grid.Row="3" Grid.Column="2" ItemsSource="{Binding other_side_types}" ItemTemplate="{StaticResource EnumDescriptionTemplate}" SelectedItem="{Binding other_side}"/>
+                        <StackPanel
+                            Orientation="Horizontal"
+                            Grid.Row="5"
+                            >
+                          <TextBlock VerticalAlignment="Center">Stop Order</TextBlock>
+                          <c:HelpButton Margin="4,0,0,0" ToolTip="This is the type of the 'stop' order to send." />
+                        </StackPanel>
+                        <uag:OrderDetailsPopupControl
+                          Grid.Row="5" Grid.Column="2"
+                          IsOpen="{Binding other_order.editable_properties_open, FallbackValue=False}"
+                          ItemsSource="{Binding other_order_types}"
+                          SelectedItem="{Binding other_order}"
+                          HasEditableProperties="{Binding other_order.has_editable_properties, FallbackValue=False}"
+                        />
+                        <StackPanel
+                            Orientation="Horizontal"
+                            Grid.Row="7"
+                            >
+                          <TextBlock VerticalAlignment="Center">Child</TextBlock>
+                          <c:HelpButton Margin="4,0,0,0" ToolTip="This is the type of order to be placed when the algo is triggered." />
+                        </StackPanel>
+
+                        <uag:OrderDetailsPopupControl
+                          Grid.Row="7" Grid.Column="2"
+                          IsOpen="{Binding child_order.editable_properties_open, FallbackValue=False}"
+                          ItemsSource="{Binding child_order_types}"
+                          SelectedItem="{Binding child_order}"
+                          HasEditableProperties="{Binding child_order.has_editable_properties, FallbackValue=False}"
+                        />
+                      </Grid>
+                    </DataTemplate>
+                  </usp:OrderModificationTemplateSelector.OCOOrderTemplate>                  
                  <usp:OrderModificationTemplateSelector.OffsetOrderTemplate>
                    <DataTemplate>
                      <Grid>
@@ -773,9 +790,11 @@
                              </usp:DynamicOrderParamTemplateSelector>
                            </ItemsControl.ItemTemplateSelector>
                        </ItemsControl>
-                        <TextBlock Grid.Row="3">Child</TextBlock>
+                        <TextBlock Grid.Row="3" 
+                        Visibility="{Binding has_child, Converter={StaticResource BooleanToVisibilityConverter}}" >Child</TextBlock>
                        <uag:OrderDetailsPopupControl
-                          Grid.Row="3" Grid.Column="2"
+                          Grid.Row="3" Grid.Column="2"  
+                          Visibility="{Binding has_child, Converter={StaticResource BooleanToVisibilityConverter}}"
                          IsOpen="{Binding child_order.editable_properties_open, FallbackValue=False}"
                          ItemsSource="{Binding child_order_types}"
                          SelectedItem="{Binding child_order}"
@@ -0,0 +1,72 @@
+<UserControl x:Class="mbts.ui.controls.PriceEntryCommitControl"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
+             mc:Ignorable="d" 
+             xmlns:u="clr-namespace:mbts.ui"
+             xmlns:cv="clr-namespace:mbts.ui.converters"
+             xmlns:uspcv="clr-namespace:mbts.ui.spark.converters"
+             xmlns:c="clr-namespace:mbts.ui.controls"
+             xmlns:usp="clr-namespace:mbts.ui.spark"
+             d:DesignHeight="100" d:DesignWidth="800" x:Name="_me_price">
+  <UserControl.Resources>
+    <cv:NullableDoubleConverter x:Key="TickDefaultPriceConverter" DefaultValue="0"/>
+    <uspcv:TickDisplayConverter x:Key="TickDisplayConverter" x:Shared="False"/>
+    <ControlTemplate x:Key="ReadTemplate">
+      <Grid HorizontalAlignment="Right" VerticalAlignment="Center">
+        <Grid.ColumnDefinitions>
+          <ColumnDefinition Width="*" />
+          <ColumnDefinition Width="Auto" />
+        </Grid.ColumnDefinitions>
+        <TextBlock Grid.ColumnSpan="2">
+          <TextBlock.Text>
+            <MultiBinding Converter="{StaticResource TickDisplayConverter}">
+              <Binding Path="SourceValue" ElementName="_me_price"/>
+              <Binding Path="SourceContractSpec" ElementName="_me_price"/>
+            </MultiBinding>
+          </TextBlock.Text>
+        </TextBlock>
+      </Grid>
+    </ControlTemplate>
+    <ControlTemplate x:Key="EditTemplate">
+      <Grid HorizontalAlignment="Right" VerticalAlignment="Center">
+        <Grid.ColumnDefinitions>
+          <ColumnDefinition Width="*" />
+          <ColumnDefinition Width="Auto" />
+        </Grid.ColumnDefinitions>
+        <usp:PriceEntryControl x:Name="price_ticker" 
+                               Margin="0,0,2,0" 
+                               TickDefaultValue="{Binding SourceValue, ElementName=_me_price, Converter={StaticResource TickDefaultPriceConverter}, FallbackValue={u:Double 0}}"
+                               ContractSpec="{Binding SourceContractSpec, ElementName=_me_price}" 
+                               Value="{Binding SourceValue, ElementName=_me_price}" />
+        <Button Grid.Column="2" x:Name="commit_button" CommandParameter="{Binding Value, ElementName=price_ticker}" Command="{Binding OnCommit, ElementName=_me_price}" Content="✔" >
+          <Button.Style>
+            <Style TargetType="Button">
+              <Style.Triggers>
+                <Trigger Property="IsEnabled" Value="True">
+                  <Setter Property="Background" Value="Green" />
+                  <Setter Property="Foreground" Value="White" />
+                </Trigger>
+              </Style.Triggers>
+            </Style>
+          </Button.Style>
+        </Button>
+      </Grid>
+    </ControlTemplate>
+  </UserControl.Resources>
+  
+  <UserControl.Style>
+    <Style TargetType="UserControl">
+      <Setter Property="Template" Value="{StaticResource ReadTemplate}"/>
+      <Style.Triggers>
+        <DataTrigger Binding="{Binding is_selected}" Value="True">
+          <Setter Property="Template" Value="{StaticResource EditTemplate}"/>
+        </DataTrigger>
+        <DataTrigger Binding="{Binding is_price_dirty}" Value="True">
+          <Setter Property="Template" Value="{StaticResource EditTemplate}"/>
+        </DataTrigger>
+      </Style.Triggers>
+    </Style>
+  </UserControl.Style>
+</UserControl>
@@ -0,0 +1,73 @@
+using bts.api;
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace mbts.ui.controls {
+   /// <summary>
+   /// Interaction logic for PriceEntryCommitControl.xaml
+   /// </summary>
+   public partial class PriceEntryCommitControl : UserControl {
+
+
+      public static readonly DependencyProperty SourceValueProperty =
+         DependencyProperty.Register("SourceValue",
+         typeof(double),
+         typeof(PriceEntryCommitControl),
+         new FrameworkPropertyMetadata { 
+            BindsTwoWayByDefault = true,
+            PropertyChangedCallback = source_value_changed
+         }
+      );
+           
+      public double SourceValue {
+         get => (double)GetValue(SourceValueProperty);
+         set => SetValue(SourceValueProperty, value);
+      }
+      private static void source_value_changed(DependencyObject d, DependencyPropertyChangedEventArgs e) {
+         if (d is PriceEntryCommitControl _instance_of_me) {
+            _instance_of_me.Dispatcher.BeginInvoke(
+               (Action)(() => _instance_of_me.OnCommit?.TryRaiseCanExecuteChanged())
+            );
+         }
+      }
+
+      public static readonly DependencyProperty SourceContractSpecProperty =
+         DependencyProperty.Register("SourceContractSpec", typeof(ContractSpecificationImmutable?), typeof(PriceEntryCommitControl));
+      public ContractSpecificationImmutable? SourceContractSpec {
+         get => (ContractSpecificationImmutable?)GetValue(SourceContractSpecProperty);
+         set => SetValue(SourceContractSpecProperty, value);
+      }
+
+   //   public static readonly DependencyProperty PriceTextProperty =
+   //DependencyProperty.Register("PricText", typeof(string), typeof(PriceEntryCommitControl));
+   //   public string PriceText {
+   //      get => (string)GetValue(PriceTextProperty);
+   //      set => SetValue(PriceTextProperty, value);
+   //   }
+
+      public static readonly DependencyProperty OnCommitProperty =
+         DependencyProperty.Register("OnCommit", typeof(ICommand), typeof(PriceEntryCommitControl));
+      public ICommand OnCommit {
+         get => (ICommand)GetValue(OnCommitProperty);
+         set => SetValue(OnCommitProperty, value);
+      }
+
+      public PriceEntryCommitControl() {
+         InitializeComponent();
+      }
+
+   }
+}
@@ -0,0 +1,55 @@
+<UserControl x:Class="mbts.ui.controls.TickUpDownNullableUIntCommit"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
+             mc:Ignorable="d" 
+             xmlns:c="clr-namespace:mbts.ui.controls"
+             d:DesignHeight="100" d:DesignWidth="800" x:Name="_me">
+  <UserControl.Resources>
+    <ControlTemplate x:Key="ReadTemplate">
+      <Grid HorizontalAlignment="Right" VerticalAlignment="Center">
+        <Grid.ColumnDefinitions>
+          <ColumnDefinition Width="*" />
+          <ColumnDefinition Width="Auto" />
+        </Grid.ColumnDefinitions>
+        <TextBlock Grid.ColumnSpan="2" Text="{Binding SourceValue, ElementName=_me}" />
+      </Grid>
+    </ControlTemplate>
+    <ControlTemplate x:Key="EditTemplate">
+      <Grid HorizontalAlignment="Right" VerticalAlignment="Center">
+        <Grid.ColumnDefinitions>
+          <ColumnDefinition Width="*" />
+          <ColumnDefinition Width="Auto" />
+        </Grid.ColumnDefinitions>
+        <c:TickUpDownNullableUInt x:Name="qty_ticker" Margin="0,0,2,0" Value="{Binding SourceValue, ElementName=_me}" />
+        <Button Grid.Column="2" x:Name="commit_button" CommandParameter="{Binding Value, ElementName=qty_ticker}" Command="{Binding OnCommit, ElementName=_me}" Content="✔" >
+          <Button.Style>
+            <Style TargetType="Button">
+              <Style.Triggers>
+                <Trigger Property="IsEnabled" Value="True">
+                  <Setter Property="Background" Value="Green" />
+                  <Setter Property="Foreground" Value="White" />
+                </Trigger>
+              </Style.Triggers>
+            </Style>
+          </Button.Style>
+        </Button>
+      </Grid>
+    </ControlTemplate>
+  </UserControl.Resources>
+
+  <UserControl.Style>
+    <Style TargetType="UserControl">
+      <Setter Property="Template" Value="{StaticResource ReadTemplate}"/>
+        <Style.Triggers>
+          <DataTrigger Binding="{Binding is_selected}" Value="True">
+            <Setter Property="Template" Value="{StaticResource EditTemplate}"/>
+          </DataTrigger>
+          <DataTrigger Binding="{Binding is_qty_dirty}" Value="True">
+            <Setter Property="Template" Value="{StaticResource EditTemplate}"/>
+          </DataTrigger>
+        </Style.Triggers>
+      </Style>
+  </UserControl.Style>
+</UserControl>
@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace mbts.ui.controls {
+   /// <summary>
+   /// Interaction logic for TickUpDownNullableUIntCommit.xaml
+   /// </summary>
+   public partial class TickUpDownNullableUIntCommit : UserControl {
+
+
+      public static readonly DependencyProperty SourceValueProperty =
+         DependencyProperty.Register("SourceValue",
+         typeof(uint?),
+         typeof(TickUpDownNullableUIntCommit),
+         new FrameworkPropertyMetadata { 
+            BindsTwoWayByDefault = true,
+            PropertyChangedCallback = source_value_changed
+         }
+      );
+
+      private static void source_value_changed(DependencyObject d, DependencyPropertyChangedEventArgs e) {
+         if (d is TickUpDownNullableUIntCommit _instance_of_me) {
+            _instance_of_me.Dispatcher.BeginInvoke(
+               (Action)(() => _instance_of_me.OnCommit?.TryRaiseCanExecuteChanged())
+            );
+         }
+      }
+
+      public uint? SourceValue {
+         get => GetValue(SourceValueProperty) as uint?;
+         set => SetValue(SourceValueProperty, value);
+      }
+
+      public static readonly DependencyProperty OnCommitProperty =
+         DependencyProperty.Register("OnCommit", typeof(ICommand), typeof(TickUpDownNullableUIntCommit));
+      public ICommand OnCommit {
+         get => (ICommand)GetValue(OnCommitProperty);
+         set => SetValue(OnCommitProperty, value);
+      }
+
+      public TickUpDownNullableUIntCommit() {
+         InitializeComponent();
+      }
+
+   }
+}
@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Windows;
+using System.Windows.Data;
+
+namespace mbts.ui.converters {
+   class ResponsiveTextConverter : IValueConverter {
+
+      public string ShortText { get; set; }
+      public string LongText { get; set; }
+      public double Threshold { get; set; }
+
+
+      public object Convert(object value, Type targetType, object parameter, CultureInfo culture) {
+         if (value is double _input) {
+            if (_input < Threshold) {
+               return ShortText;
+            } else {
+               return LongText;
+            }
+         }
+         return LongText;
+      }
+
+      public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) {
+         throw new NotImplementedException();
+      }
+   }
+}
@@ -1,39 +1,29 @@
-using System;
-using System.Collections.Generic;
-using System.Collections.ObjectModel;
-using System.ComponentModel.Composition;
-using System.Diagnostics;
-using System.Linq;
-using System.Text;
-using System.Threading;
-using System.Threading.Tasks;
-using System.Windows;
-using System.Windows.Threading;
-using mbts.config;
-using mbts.ui.native;
-using mbts.utils;
-using bts.co2;
-using bts.api.user;
+using bts;
+using bts.api;
+using bts.api.core;
 using bts.api.persistence;
-using bts;
+using bts.api.user;
+using mbts.config;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows.Threading;

-namespace mbts.ui.shell
-{
+namespace mbts.ui.shell {
   // The LoginContainer participates in the startup Import/Export dependency system
   // Since the login form should not depend on *anything* it will be shown before this is created
   // Once this is created it access the global LoginModel and retrieves the username
   internal class LoginContainer
   {
      [ImportingConstructor]
-      public LoginContainer(UserService user, [Import("settings")] PersistenceService persist) {
+      public LoginContainer(ServiceContext context) {
         var model = LoginModel.instance;
-         model.provide_services(user, persist);
+         model.provide_services(context);
         // await_login pumps the dispatcher but doesn't allow control to return to MEF until the username and workspace are available
         model.await_login();
-         var u = model.get_user();
-         UserName = u.name;
-         UserId = u.id;
-         Token = u.token;
+         (UserName,UserId,Token) = model.get_user();
         Workspace = model.get_workspace();
         model.Dispose();
      }
@@ -44,21 +34,19 @@ namespace mbts.ui.shell
      [Export("userid")]
      public uint UserId { get; private set; }
      [Export]
-      public AuthToken Token { get; private set; }
+      public AuthTokenImmutable Token { get; private set; }

      [Export("workspace")]
      public string Workspace { get; private set; }
   }

   public struct User {
-      public User(string name, uint id, AuthToken token) {
+      public User(string name, uint id) {
         this.name = name;
         this.id = id;
-         this.token = token;
      }
      public readonly string name;
      public readonly UInt32 id;
-      public readonly AuthToken token;
   }

   public class LoginModel : IDisposable
@@ -66,11 +54,10 @@ namespace mbts.ui.shell
      // Singleton to help bootstrap the system
      private static LoginModel _instance = new LoginModel();
      public static LoginModel instance { get { return _instance; } }
-      private User _user;
      private string _workspace;
      private PreloginWorkspaceEnumerator _enum_workspace;
-      
-      UserService _logon;
+
+      ServiceContext _ctx;
      DispatcherFrame _frame = new DispatcherFrame();

      private LoginModel() {
@@ -82,13 +69,14 @@ namespace mbts.ui.shell
      public string ErrorMessage { get; private set; }
      public bool HasFatalError { get; set; }
      public User[] Users { get; private set; }
-      
-      
+
+
      // The final username
-      public User get_user() { 
-         Log.assert_d(!string.IsNullOrEmpty(_user.name)); 
-         return _user;
+      public (string, uint, AuthTokenImmutable) get_user() {
+         Log.assert_d(!string.IsNullOrEmpty(_ctx.user));
+         return (_ctx.user, _ctx.user_id, _ctx.token.Value);
      }
+
      public string get_workspace() {
         return _workspace ?? "";
      }
@@ -112,13 +100,13 @@ namespace mbts.ui.shell
         }

         // Wait for the hub to create the login doodad
-         (var users, var persist) = await _hub_src.Task;
-         _logon = users;
+         _ctx = await _hub_src.Task;
         // Populate the UI
-         _enum_workspace = new PreloginWorkspaceEnumerator(persist);
-         var response = await _logon.get_users_async(new GetUsersRequest());
+         _enum_workspace = new PreloginWorkspaceEnumerator(_ctx.locate<PersistenceService>("settings"));
+         var auth = _ctx.locate<AuthService>();
+         var response = await auth.get_users_async(new GetUsersRequest());
         if (response.success) {
-            Users = response.value.Users.Select(x => new User(x.Login,x.Id, null)).OrderBy(u => u.name).ToArray();
+            Users = response.value.Users.Select(x => new User(x.Login,x.Id)).OrderBy(u => u.name).ToArray();
         }
         else {
            ErrorMessage = "Logon: " + response.error_message;
@@ -129,49 +117,37 @@ namespace mbts.ui.shell

      #endregion

-      public async Task<(bool success,string info)> do_login(string username, string workspace, string password) {
+      public async Task<LoginResult> do_login(string username, string workspace, string password) {
         if (Users.Select(u => u.name).Contains(username)) {
-            var response = await _logon.authenticate_login_async(new AuthenticateLoginRequest() {
-               Login = username,
-               Password = password ??""
-            });
-            if (response.success) {
-               if (response.value.IsValid) {
-                  _workspace = workspace;
-                  set_authenticated_user(new User(username, response.value.UserId, response.value.Token));
-                  return (true, "");
-               }
-               else {
-                  return (false, response.value.Reason);
-               }
-            }
-            else {
-               return (false, response.error_message);
+            var result = await _ctx.login(username, password);
+            if (result.success) {
+               _workspace = workspace;
+               on_user_authenticated(_ctx.user, _ctx.token);
            }
+            return result;
         }
-         return (false, "Invalid username");
+         return new LoginResult("Invalid username");
      }

-      private void set_authenticated_user(User user) {
-         Log.assert(!string.IsNullOrEmpty(user.name));
-         Log.assert(Users.Select(u => u.name).Contains(user.name));
-         _user = user;
-         Environment.SetEnvironmentVariable("BTS_USER", user.name);
+      private void on_user_authenticated(string username, AuthTokenImmutable? token) {
+         Log.assert(!string.IsNullOrEmpty(username));
+         Log.assert(Users.Select(u => u.name).Contains(username));
+         Environment.SetEnvironmentVariable("BTS_USER", username);
         _frame.Continue = false;
      }

      public void await_login() {
-         if (string.IsNullOrEmpty(_user.name)) {
+         if (!_ctx.token.HasValue) {
            Dispatcher.PushFrame(_frame);
         }
      }

      
      #region provide hub
-      public void provide_services(UserService u, PersistenceService p) {
-         _hub_src.TrySetResult((u,p));
+      internal void provide_services(ServiceContext ctx) {
+         _hub_src.TrySetResult(ctx);
      }
-      private TaskCompletionSource<(UserService, PersistenceService)> _hub_src = new TaskCompletionSource<(UserService, PersistenceService)>();
+      private TaskCompletionSource<ServiceContext> _hub_src = new TaskCompletionSource<ServiceContext>();
      #endregion

      #region Dispose
@@ -138,14 +138,15 @@ namespace mbts.ui.shell
         if (selected_workspace == "New workspace...") {
            selected_workspace = null;
         }
-         (bool success, string message) = await _model.do_login(Name, selected_workspace, Password);
-         if (success) { VisualState = "Loading"; }
-         if (!success && !string.IsNullOrEmpty(message)) {
-            WarningMessage = message;
+         var result = await _model.do_login(Name, selected_workspace, Password);
+         if (result.success) { VisualState = "Loading"; }
+         if (!result.success && !string.IsNullOrEmpty(result.reason)) {
+            WarningMessage = result.reason;
            VisualState = "BadPassword";
         }
-         else if (!string.IsNullOrEmpty(message)) {
-            BTSMessageBox.Show(message, "Login Message", BTSMessageBoxButtons.OK, MessageBoxImage.Information);
+         else if (!string.IsNullOrEmpty(result.reason)) {
+            // Login was successful but we have a message for the user
+            BTSMessageBox.Show(result.reason, "Login Message", BTSMessageBoxButtons.OK, MessageBoxImage.Information);
         }
      }
      private void OnCancel(object unused) {
@@ -11,7 +11,7 @@ namespace bts.settings {
   public class SettingsManagerTool {
      public static void run() {
         var sc = new ServiceContext();
-         var users = sc.locate<UserService>();
+         var users = sc.locate<AuthService>();
         var persist = sc.locate<PersistenceService>("settings");
         var user_list = users.get_users(new GetUsersRequest());
         var user_names = user_list.Users.Select(u => u.Login);
@@ -123,7 +123,7 @@ namespace mbts.spark {
         return intpart + floatpart;
      }

-      public static RegionalTickFactors get_regional_ticks(ContractSpecificationImmutable spec) =>
+      public static RegionalTickFactors get_regional_ticks(ContractSpecificationImmutable? spec) =>
         TickStore.get(spec);

      public static RegionalTickFactors get_regional_ticks(SecurityImmutable security) =>
@@ -177,8 +177,14 @@ namespace mbts.spark {
         public static RegionalTickFactors get(ContractSpecification spec) =>
            _exchange_ticks.GetOrAdd(new SpecKey(spec), _create_rtf);

-         public static RegionalTickFactors get(ContractSpecificationImmutable spec) =>
-            _exchange_ticks.GetOrAdd(new SpecKey(spec), _create_rtf);
+         public static RegionalTickFactors get(ContractSpecificationImmutable? spec) {
+            if (spec.HasValue) {
+               return _exchange_ticks.GetOrAdd(new SpecKey(spec.Value), _create_rtf);
+            }
+            else {
+               return null;
+            }
+         }

         public static RegionalTickFactors get(SecurityImmutable security) =>
            security.HasContractSpec ? get(security.ContractSpec) : default_rtf;
@@ -110,7 +110,7 @@ namespace mbts.spark {
      {
            var lgh = source as LadderGridHost;
            double width_adjustment = (double)(uint) e.NewValue - (double)(uint) e.OldValue;
-            lgh._adjust_column_width(lgh.columns.First(c => c.column_type == ColumnType.Order), width_adjustment);    
+            lgh._adjust_column_width(lgh.columns.FirstOrDefault(c => c.column_type == ColumnType.Order), width_adjustment);    
      }

      public uint bid_column_width
@@ -126,7 +126,7 @@ namespace mbts.spark {
      {
         var lgh = source as LadderGridHost;
         double width_adjustment = (double)(uint) e.NewValue - (double)(uint) e.OldValue;
-         lgh._adjust_column_width(lgh.columns.First(c => c.column_type == ColumnType.Bid), width_adjustment);    
+         lgh._adjust_column_width(lgh.columns.FirstOrDefault(c => c.column_type == ColumnType.Bid), width_adjustment);    
      }

      public uint price_column_width
@@ -142,7 +142,7 @@ namespace mbts.spark {
      {
            var lgh = source as LadderGridHost;
            double width_adjustment = (double)(uint) e.NewValue - (double)(uint) e.OldValue;
-            lgh._adjust_column_width(lgh.columns.First(c => c.column_type == ColumnType.Price), width_adjustment);    
+            lgh._adjust_column_width(lgh.columns.FirstOrDefault(c => c.column_type == ColumnType.Price), width_adjustment);    
      }


@@ -159,14 +159,14 @@ namespace mbts.spark {
      {
            var lgh = source as LadderGridHost;
            double width_adjustment = (double)(uint) e.NewValue - (double)(uint) e.OldValue;
-            lgh._adjust_column_width(lgh.columns.First(c => c.column_type == ColumnType.Ask), width_adjustment);    
+            lgh._adjust_column_width(lgh.columns.FirstOrDefault(c => c.column_type == ColumnType.Ask), width_adjustment);    
      }

      public static readonly DependencyProperty VolumeColumnWidthProperty =
         WPFHelper.create_dp<uint, LadderGridHost>(
            nameof(VolumeColumnWidth),
            FrameworkPropertyMetadataOptions.BindsTwoWayByDefault,
-            (o, oldval, newval) => o._adjust_column_width(o.columns.First(c => c.column_type == ColumnType.Volume), (double)newval - (double)oldval),
+            (o, oldval, newval) => o._adjust_column_width(o.columns.FirstOrDefault(c => c.column_type == ColumnType.Volume), (double)newval - (double)oldval),
            50u);

      public uint VolumeColumnWidth {
@@ -178,7 +178,7 @@ namespace mbts.spark {
         WPFHelper.create_dp<uint, LadderGridHost>(
            nameof(LastColumnWidth),
            FrameworkPropertyMetadataOptions.BindsTwoWayByDefault,
-            (o, oldval, newval) => o._adjust_column_width(o.columns.First(c => c.column_type == ColumnType.Last), (double)newval - (double)oldval),
+            (o, oldval, newval) => o._adjust_column_width(o.columns.FirstOrDefault(c => c.column_type == ColumnType.Last), (double)newval - (double)oldval),
            50u);

      public uint LastColumnWidth {
@@ -327,6 +327,8 @@ namespace mbts.spark {
      }

      void _adjust_column_width(Column column, double adjustment) {
+         if (column == null)
+            return;
         int new_col_width;
         switch (column.column_type) {
            case ColumnType.Order: new_col_width = (int)orders_column_width; break;
@@ -662,22 +664,10 @@ namespace mbts.spark {
         } else {
            init = false;
            prev_row_height = _settings.row_height;
-            // This is a general issue with default-settings:
-            // "Not every property in the settings object should be shared across windows."
-            // Column widths are one such property (they are changed from the actual Ladder window, not the settings dialog).
-            // Below is a hack which prevents overwriting current column widths; until we come up with a better solution this will suffice.
-            // TODO: fix this by moving such properties from the settings proto into a separate proto (or come up with a better workaround/solution)
-            copy_col_width(v => v.orders_column);
-            copy_col_width(v => v.bid_column);
-            copy_col_width(v => v.price_column);
-            copy_col_width(v => v.ask_column);
-            copy_col_width(v => v.volume_column.general);
-            copy_col_width(v => v.last_column);
-            void copy_col_width(Func<LadderSettings, LadderColumnSettings> select_col) =>
-               select_col(s).width = select_col(_settings).width;
         }
-         //
-         _settings = s;
+         /// The viewmodel will always have the most up-to-date settings, so ignore <see cref="s"/> and just get it from <see cref="_vm"/>.
+         /// This is a workaround for the global settings-defaults issue: when defaults are updated, some properties are inadvertantly overwritten, such as column-widths, etc.
+         _settings = _vm.get_save_state();
         _bid_vis_tup.glyph_context = glyph_context(s.bid_column);
         _ask_vis_tup.glyph_context = glyph_context(s.ask_column);
         _price_vis_tup.glyph_context = glyph_context(s.price_column);
@@ -698,18 +688,19 @@ namespace mbts.spark {
         // Renders the grid lines and column backgrounds
         _visualHost.AddVisualChild(_gridvis);
         // Orders column
-         orders_column_width = s.orders_column.width;
+         SetCurrentValue(orders_column_widthProperty, s.orders_column.width);
         _ordershost.update_settings(_price_list, _price_comparer, s.row_height, s.orders_column);
         foreach (var col in columns) {
            if (col.visual_tup != null) {
               if (col.settings.show) {
                  _visualHost.AddVisualChild(col.visual_tup.visual);
                  switch (col.column_type) {
-                     case ColumnType.Bid: bid_column_width = col.settings.width; break;
-                     case ColumnType.Price: price_column_width = col.settings.width; break;
-                     case ColumnType.Ask: ask_column_width = col.settings.width; break;
+                     case ColumnType.Bid: SetCurrentValue(bid_column_widthProperty, col.settings.width); break;
+                     case ColumnType.Price: SetCurrentValue(price_column_widthProperty, col.settings.width); break;
+                     case ColumnType.Ask: SetCurrentValue(ask_column_widthProperty, col.settings.width); break;
+                     case ColumnType.Last: SetCurrentValue(LastColumnWidthProperty, col.settings.width); break;
                     case ColumnType.Volume:
-                        VolumeColumnWidth = col.settings.width;
+                        SetCurrentValue(VolumeColumnWidthProperty, col.settings.width);
                        _volume_container.mark_dirty();
                        break;
                  }
@@ -37,7 +37,7 @@ namespace mbts.spark {
      readonly Property<Brush> _foreground, _background, _hoverbackground, _border, _parent_algo_type_brush;
      readonly Property<bool> _is_exchange_order, _has_multiple_orders_at_same_level, _is_hedge_order;
      readonly Property<CustomOrderDefinition.CustomOneofCase> _parent_algo_type;
-      readonly Property<string> _summary, _description;
+      readonly Property<string> _summary;
      IObservable<LadderSettings.BadgeStyle> _bs;
      LadderSettings.BadgeStyle _current_badge_style;
      int _n_active_price_change_ops = 0;
@@ -63,7 +63,6 @@ namespace mbts.spark {
         _hoverbackground = backing(nameof(hoverbackground), _color_bg_brush);
         _border = backing(nameof(border), _color_bg_brush);
         _summary = backing(nameof(summary), string.Empty);
-         _description = backing(nameof(description), string.Empty);
         _is_exchange_order = backing(nameof(is_exchange_order), false);
         _has_multiple_orders_at_same_level = backing(nameof(has_multiple_orders_at_same_level), false);
         _is_hedge_order = backing(nameof(is_hedge_order), false);
@@ -75,6 +74,7 @@ namespace mbts.spark {
         Brush get_foreground(LadderSettings s) => s.orders_column.foreground.rgb_brush();
         //
         add_order(o);
+
         _dispose = Disposable.Create(
            _bs.Subscribe(badge => {
               _current_badge_style = badge;
@@ -122,7 +122,6 @@ namespace mbts.spark {

         if (_orders.Any()) {
            summary = _orders.Values.Select(order => order.short_description(_parent.security.ContractSpec)).Aggregate((s1, s2) => $"{s1}{Environment.NewLine}{Environment.NewLine}{s2}");
-            description = _orders.Values.Select(order => order.full_description(_parent.security)).Aggregate((s1, s2) => $"{s1}{Environment.NewLine}{Environment.NewLine}{s2}");
         }
         _set_badge_text();

@@ -185,11 +184,10 @@ namespace mbts.spark {
      public Brush hoverbackground { get => _hoverbackground.Value; private set => _hoverbackground.Value = value; }
      public Brush border { get => _border.Value; private set => _border.Value = value; }
      public string summary { get => _summary.Value; private set => _summary.Value = value; }
-      public string description { get => _description.Value; private set => _description.Value = value; }
      public bool is_exchange_order { get => _is_exchange_order.Value; private set => _is_exchange_order.Value = value; }
      public bool has_multiple_orders_at_same_level { get => _has_multiple_orders_at_same_level.Value; private set => _has_multiple_orders_at_same_level.Value = value; }
      public bool is_hedge_order { get => _is_hedge_order.Value; private set => _is_hedge_order.Value = value; }
-      public Brush parent_algo_type_brush { get => _parent_algo_type_brush.Value; private set => _parent_algo_type_brush.Value = value; }
+      public Brush parent_algo_type_brush { get => _parent_algo_type_brush.Value; private set => _parent_algo_type_brush.Value = value; }      
      // the setter is public so that the LadderVM can set this field
      public CustomOrderDefinition.CustomOneofCase parent_algo_type { get => _parent_algo_type.Value; set => _parent_algo_type.Value = value; }

@@ -224,6 +222,56 @@ namespace mbts.spark {
         }
      }

+      public OrderBookVM create_orderbook_vm() {
+         // We are returning a new OrderBookVM each time b/c after
+         // successive launches of the mini-ob from the same badge, we get an exception
+         // System.InvalidOperationException: Sharing GridViewColumn among multiple GridViewColumnCollections or adding the same GridViewColumn into one GridViewColumnCollection more than once is not allowed.
+         // I checked with Eric and he guesses that what is happening is that the Popup is throwing away the grid, but the binding doesn't remove the columns from that grid
+         // 
+         // I think returning a new OrderbookVM is okay at the moment since this Popup window will not be saving any state at this time
+         var price_filter = new filters.DoubleMinMaxState();
+         price_filter.minimum.value = real_price;
+         price_filter.maximum.value = real_price;
+
+         var obvm = new OrderBookVM(null, _parent.bus, null, _parent.model.order_gateway, null, true);
+         var state = new bts.shell.OrderBookWindowFactory.OrderBookStartupData(
+            new bts.shell.OrderBookWindowFactory.FilterStates {
+               security_criteria = new SecurityCriteria(_parent.security),
+               price = price_filter,
+               statuses = new[] { OrderStatus.Working }
+            },
+            bts.shell.OrderBookWindowFactory.OrderBookStartupData.default_mini_grid,
+            use_defaults: false
+         );
+         // NOTE:
+         // we might need the ObservableAppend to InsertAt
+         // if these EditXXX ever support settings.
+         // insert the cancel column
+         obvm.columns.Insert(0, new OrderBookVM.CancelColumn(nameof(OrderBookRowVM.cancel_command)));
+         var qty_col = obvm.columns.FirstOrDefault(x => x.id == OrderBookView.Columns.Size.ToString());
+         var qty_index = obvm.columns.indexOf(qty_col);
+         if (qty_index > -1) {
+            // insert the edit column in the same position that the hidden column occupies
+            var existing_editqty_col = obvm.columns.FirstOrDefault(x => x.id == OrderBookView.Columns.EditableQty.ToString());
+            var existing_editqty_index = obvm.columns.indexOf(existing_editqty_col);
+            if (existing_editqty_index == -1) {
+               obvm.columns.Insert(qty_index, new OrderBookVM.EditableQtyColumn());
+            }
+         }
+         var price_col = obvm.columns.FirstOrDefault(x => x.id == OrderBookView.Columns.Price.ToString());
+         var price_index = obvm.columns.indexOf(price_col);
+         if (price_index > -1) {
+            var existing_editprice_col = obvm.columns.FirstOrDefault(x => x.id == OrderBookView.Columns.EditablePrice.ToString());
+            var existing_editprice_index = obvm.columns.indexOf(existing_editprice_col);
+            if (existing_editprice_index == -1) {
+               // insert the edit price column immediately after the edit qty
+               obvm.columns.Insert(qty_index + 1, new OrderBookVM.EditablePriceColumn());
+            }
+         }
+         obvm.load_from(state);
+         return obvm;
+      }
+
      public override string ToString() {
         return $"Price: {this.price} Order Count: {this.orders.Count()}";
      }
@@ -6,6 +6,7 @@ using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
+using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Data;
@@ -91,15 +92,26 @@ namespace mbts.spark {
            order.PropertyChanged += _order_PropertyChanged;
            // get the stackpanel it belongs in
            Panel panel = get_panel(price);
+            //var coords = GetAbsolutePlacement(panel, true);
            // insert Badge and wire up DataContext
            if (panel != null) {
-               panel.Children.Add(mkbadge(order));
+               panel.Children.Add(mkbadge(order, panel));
            }
         } //else {
            //Log.Ui.warn($"Failed to add order ({order.id}): order already in {nameof(LadderGridHost)}'s {nameof(_orders)}.");
         //}
      }

+      public static Rect GetAbsolutePlacement(FrameworkElement element, bool relativeToScreen = false) {
+         var absolutePos = element.PointToScreen(new System.Windows.Point(0, 0));
+         if (relativeToScreen) {
+            return new Rect(absolutePos.X, absolutePos.Y, element.ActualWidth, element.ActualHeight);
+         }
+         var posMW = Application.Current.MainWindow.PointToScreen(new System.Windows.Point(0, 0));
+         absolutePos = new System.Windows.Point(absolutePos.X - posMW.X, absolutePos.Y - posMW.Y);
+         return new Rect(absolutePos.X, absolutePos.Y, element.ActualWidth, element.ActualHeight);
+      }
+
      void _order_PropertyChanged(object sender, PropertyChangedEventArgs e) {
         if (e.PropertyName == nameof(LadderOrderVM.price)) {
            var order = (LadderOrderVM)sender;
@@ -108,35 +120,38 @@ namespace mbts.spark {
         }
      }

-      Badge mkbadge(LadderOrderVM order) {
+      Badge mkbadge(LadderOrderVM order, UIElement popup_placement_target) {
         Badge b = new Badge();
         b.DataContext = order;
         // Hook up the style from xaml
         b.Style = this.TryFindResource(typeof(Badge)) as Style;
-         b.MouseUp += (s, e) => {
+         b.MouseUp += async (s, e) => {
            var curr_order = b.DataContext as LadderOrderVM;
            if (e.ChangedButton == MouseButton.Middle) {
-               b.ContextMenu.DataContext = b.DataContext;
-               b.ContextMenu.IsOpen = true;
-               // close context menu after command executed
-               if (curr_order != null) {
-                  Action command_executed = null;
-                  command_executed = () => {
-                     try {
-                        b.ContextMenu.IsOpen = false;
-                        curr_order.command_executed -= command_executed;
-                     } catch (Exception ex) {
-                        Log.Ui.warn($"Error in {typeof(LadderGridHost)}'s {typeof(Badge)} {nameof(LadderOrderVM.command_executed)} local handler: {ex}");
-                     }
-                  };
-                  curr_order.command_executed += command_executed;
-               }
+               // create the new popup window in here
+               var obvm = order.create_orderbook_vm();
+               await Task.Delay(100); // Wait for obvm to load rows collection before showing UI to avoid a flash
+               var view = new MiniOrderBookView(obvm);
+               var popup = new System.Windows.Controls.Primitives.Popup {
+                  // we only keep the obvm around assigned to the DataContext so that we can
+                  // properly Dispose of it later when the popup is closed.
+                  DataContext = obvm,
+                  Child = view,
+                  StaysOpen = false,
+                  PlacementTarget = popup_placement_target,
+                  Placement = System.Windows.Controls.Primitives.PlacementMode.Bottom,
+                  VerticalOffset = 5
+               };
+               popup.SetBinding(System.Windows.Controls.Primitives.Popup.IsOpenProperty,
+                  nameof(OrderBookVM.is_row_collection_populated)
+               );
+               popup.Closed += (sender, event_args) => (popup.DataContext as IDisposable)?.Dispose();
+               b.Popup = popup;
            } else if (e.ChangedButton == MouseButton.Left) {
               if (curr_order?.cancel_command?.CanExecute(null) == true)
                  curr_order.cancel_command.Execute(null);
            }
         };
-         b.ContextMenuOpening += (s, e) => e.Handled = true;
         return b;
      }

@@ -8,6 +8,7 @@ using System.Windows;
 using bts.proto;
 using mbts.ui.spark;
 using System.Collections.Generic;
+using System.ComponentModel;

 namespace mbts.spark {
   // IMPORTANT: BE SURE TO ADD ANY NEW PROPERTIES TO THE EQUALS FUNCTION!
@@ -179,6 +180,34 @@ namespace mbts.spark {
   // Settings are liable to change in the near future, so an internal IEqualityComparer simply won't do as it risks becoming out of date.
   [ProtoContract]
   class LadderSettings : IEquatable<LadderSettings> {
+      const double _default_order_entry_panel_width = 110.0;
+      const double _default_zoom_factor = 1.0;
+
+      // 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
+      public LadderSettings() {
+         day_visible = true;
+         high_visible = true;
+         low_visible = true;
+         open_visible = true;
+         settle_visible = true;
+         volume_visible = true;
+         account_visible = true;
+         tif_visible = true;
+         order_type_visible = true;
+         account_position_visible = true;
+         size_presets_visible = true;
+         cancel_buys_visible = true;
+         cancel_sells_visible = true;
+         cancel_all_visible = true;
+         auto_clear_visible = true;
+         clear_visible = true;
+         order_entry_panel_initial_width = _default_order_entry_panel_width;
+         zoom_factor = _default_zoom_factor;
+         use_defaults = true;
+      }
+
      public static LadderSettings Default {
         get {
            LadderColumnSettings
@@ -216,7 +245,26 @@ namespace mbts.spark {
               session_high_line = new LadderMarketBreakLine { color = BTSColors.MarketData.session_high, show = true },
               session_range_fill = new LadderMarketBreakLine { color = BTSColors.MarketData.session_range_fill, show = true },
               alternate_order_size = 0,
-               size_display = MarketSizeDisplay.get_default()
+               size_display = MarketSizeDisplay.get_default(),
+               day_visible = true,
+               high_visible = true,
+               low_visible = true,
+               open_visible = true,
+               settle_visible = true,
+               volume_visible = true,
+               account_visible = true,
+               tif_visible = true,
+               order_type_visible = true,
+               account_position_visible = true,
+               size_presets_visible = true,
+               cancel_buys_visible = true,
+               cancel_sells_visible = true,
+               cancel_all_visible = true,
+               auto_clear_visible = true,
+               clear_visible = true,
+               order_entry_panel_initial_width = _default_order_entry_panel_width,
+               zoom_slider_visible = false,
+               zoom_factor = _default_zoom_factor,
            };
         }
      }
@@ -278,6 +326,54 @@ namespace mbts.spark {
      [ProtoMember(26)]
      public MarketSizeDisplay size_display { get; set; }

+      // order entry panel items show/hide
+      [ProtoMember(27), DefaultValue(true)]
+      public bool day_visible { get; set; }
+      [ProtoMember(28), DefaultValue(true)]
+      public bool high_visible { get; set; }
+      [ProtoMember(29), DefaultValue(true)]
+      public bool low_visible { get; set; }
+      [ProtoMember(30), DefaultValue(true)]
+      public bool open_visible { get; set; }
+      [ProtoMember(31), DefaultValue(true)]
+      public bool settle_visible { get; set; }
+      [ProtoMember(32), DefaultValue(true)]
+      public bool volume_visible { get; set; }
+      [ProtoMember(33), DefaultValue(true)]
+      public bool account_visible { get; set; }
+      [ProtoMember(34), DefaultValue(true)]
+      public bool tif_visible { get; set; }
+      [ProtoMember(35), DefaultValue(true)]
+      public bool order_type_visible { get; set; }
+      [ProtoMember(36), DefaultValue(true)]
+      public bool account_position_visible { get; set; }
+      [ProtoMember(37), DefaultValue(true)]
+      public bool size_presets_visible { get; set; }
+      [ProtoMember(38), DefaultValue(true)]
+      public bool cancel_buys_visible { get; set; }
+      [ProtoMember(39), DefaultValue(true)]
+      public bool cancel_sells_visible { get; set; }
+      [ProtoMember(40), DefaultValue(true)]
+      public bool cancel_all_visible { get; set; }
+      [ProtoMember(41), DefaultValue(true)]
+      public bool auto_clear_visible { get; set; }
+      [ProtoMember(42), DefaultValue(true)]
+      public bool clear_visible { get; set; }
+      //
+      [ProtoMember(43), DefaultValue(_default_order_entry_panel_width)]
+      public double order_entry_panel_initial_width { get; set; }  
+
+      [ProtoMember(44), DefaultValue(true)]
+      public bool use_defaults { get; set; }
+
+      // the zoom slider is the first new widget on the panel
+      // since our initial general release, so its enablement
+      // will be opt-in (default not visible)
+      [ProtoMember(45)]
+      public bool zoom_slider_visible { get; set; }
+      [ProtoMember(46), DefaultValue(_default_zoom_factor)]
+      public double zoom_factor { get; set; }
+
      public bool Equals(LadderSettings other) =>
         other != null &&
         row_height == other.row_height &&
@@ -302,7 +398,27 @@ namespace mbts.spark {
         session_high_line.safe_equals(other.session_high_line) &&
         session_range_fill.safe_equals(other.session_range_fill) &&
         volume_column.safe_equals(other.volume_column) &&
-         size_display.safe_equals(other.size_display);
+         size_display.safe_equals(other.size_display) &&
+         day_visible == other.day_visible &&
+         high_visible == other.high_visible &&
+         low_visible == other.low_visible &&
+         open_visible == other.open_visible &&
+         settle_visible == other.settle_visible &&
+         volume_visible == other.volume_visible &&
+         account_visible == other.account_visible &&
+         tif_visible == other.tif_visible &&
+         order_type_visible == other.order_type_visible &&
+         account_position_visible == other.account_position_visible &&
+         size_presets_visible == other.size_presets_visible &&
+         cancel_buys_visible == other.cancel_buys_visible &&
+         cancel_sells_visible == other.cancel_sells_visible &&
+         cancel_all_visible == other.cancel_all_visible &&
+         auto_clear_visible == other.auto_clear_visible &&
+         clear_visible == other.clear_visible &&
+         order_entry_panel_initial_width == other.order_entry_panel_initial_width &&
+         zoom_slider_visible == other.zoom_slider_visible &&
+         zoom_factor == other.zoom_factor &&
+         use_defaults == other.use_defaults;

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

@@ -330,7 +446,46 @@ namespace mbts.spark {
            EqualityComparer.safe_get_hash_code(session_high_line),
            EqualityComparer.safe_get_hash_code(session_range_fill),
            EqualityComparer.safe_get_hash_code(volume_column),
-            EqualityComparer.safe_get_hash_code(size_display));
+            EqualityComparer.safe_get_hash_code(size_display),
+            day_visible.GetHashCode(),
+            high_visible.GetHashCode(),
+            low_visible.GetHashCode(),
+            open_visible.GetHashCode(),
+            settle_visible.GetHashCode(),
+            volume_visible.GetHashCode(),
+            account_visible.GetHashCode(),
+            tif_visible.GetHashCode(),
+            order_type_visible.GetHashCode(),
+            account_position_visible.GetHashCode(),
+            size_presets_visible.GetHashCode(),
+            cancel_buys_visible.GetHashCode(),
+            cancel_sells_visible.GetHashCode(),
+            cancel_all_visible.GetHashCode(),
+            auto_clear_visible.GetHashCode(),
+            clear_visible.GetHashCode(),
+            order_entry_panel_initial_width.GetHashCode(),
+            zoom_slider_visible.GetHashCode(),
+            zoom_factor.GetHashCode(),
+            use_defaults.GetHashCode());
+
+      public struct WindowSpecifics {
+         public readonly double order_entry_panel_width, zoom_factor;
+         public readonly uint orders_column_width, bid_column_width, price_column_width, ask_column_width, last_column_width, volume_column_width;
+
+         public WindowSpecifics(LadderSettings s)
+            : this(s.order_entry_panel_initial_width, s.orders_column.width, s.bid_column.width, s.price_column.width, s.ask_column.width, s.last_column.width, s.volume_column.general.width, s.zoom_factor) { }
+
+         public WindowSpecifics(double order_entry_panel_width, uint orders_column_width, uint bid_column_width, uint price_column_width, uint ask_column_width, uint last_column_width, uint volume_column_width, double zoom_factor) {
+            this.order_entry_panel_width = order_entry_panel_width;
+            this.orders_column_width = orders_column_width;
+            this.bid_column_width = bid_column_width;
+            this.price_column_width = price_column_width;
+            this.ask_column_width = ask_column_width;
+            this.last_column_width = last_column_width;
+            this.volume_column_width = volume_column_width;
+            this.zoom_factor = zoom_factor;
+         }
+      }
   }

   static class LadderSettingsExtensions {
@@ -345,5 +500,22 @@ namespace mbts.spark {

      public static IEnumerable<LadderColumnSettings> visible_columns(this LadderSettings settings) =>
         settings.all_columns().Where(c => c.show);
+
+      public static LadderSettings.WindowSpecifics get_window_specifics(this LadderSettings settings) =>
+         new LadderSettings.WindowSpecifics(settings);
+
+      public static LadderSettings with_window_specifics(this LadderSettings source, LadderSettings.WindowSpecifics specifics) {
+         // must use clone bc we are applying settings that are specific to each individual LadderWindow, and should not be shared among all ladders (even if it is default settings).
+         source = SparkUtils.clone_proto(source);
+         source.order_entry_panel_initial_width = specifics.order_entry_panel_width;
+         source.orders_column.width = specifics.orders_column_width;
+         source.bid_column.width = specifics.bid_column_width;
+         source.price_column.width = specifics.price_column_width;
+         source.ask_column.width = specifics.ask_column_width;
+         source.last_column.width = specifics.last_column_width;
+         source.volume_column.general.width = specifics.volume_column_width;
+         source.zoom_factor = specifics.zoom_factor;
+         return source;
+      }
   }
 }
@@ -17,6 +17,7 @@ namespace mbts.spark {
      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;
      LadderSettings _current;
      LadderColumnSettingsVM
         _orders = new OrdersColumnSettingsVM(),
@@ -32,14 +33,35 @@ namespace mbts.spark {
         _session_low_mkt_line = new LadderMarketBreakLineVM("Session Low", 2, 1),
         _session_high_mkt_line = new LadderMarketBreakLineVM("Session High", 2, 1, false),
         _session_range_fill = new LadderMarketBreakLineVM("Session Range", 0, 0, false);
+      OrderEntryPanelItemVisibilityVM
+         _zoom_slider_visbility = new OrderEntryPanelItemVisibilityVM("Zoom Slider"),
+         _day_visibility = new OrderEntryPanelItemVisibilityVM("Day Change"),
+         _high_visibility = new OrderEntryPanelItemVisibilityVM("High"),
+         _low_visibility = new OrderEntryPanelItemVisibilityVM("Low"),
+         _open_visibility = new OrderEntryPanelItemVisibilityVM("Open"),
+         _settle_visibility = new OrderEntryPanelItemVisibilityVM("Settle"),
+         _volume_visibility = new OrderEntryPanelItemVisibilityVM("Volume"),
+         _account_visibility = new OrderEntryPanelItemVisibilityVM("Account"),
+         _tif_visibility = new OrderEntryPanelItemVisibilityVM("Time In Force"),
+         _order_type_visibility = new OrderEntryPanelItemVisibilityVM("Order Type"),
+         _account_position_visibility = new OrderEntryPanelItemVisibilityVM("Account 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");

-      public LadderSettingsVM(bool is_synthetic) {
+      public LadderSettingsVM(bool is_synthetic, Func<double> get_left_panel_width, Func<double> get_zoom_factor) {
         this.is_synthetic = is_synthetic;
         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;
+         // 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;
         _bid.font_size_changed += on_font_size_changed;
@@ -108,6 +130,28 @@ namespace mbts.spark {
         }
      }

+      public IEnumerable<OrderEntryPanelItemVisibilityVM> order_entry_panel_items {
+         get {
+            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 _size_preset_visibility;
+            yield return _clear_visibility;
+            yield return _auto_clear_visibility;
+            yield return _cancel_buys_visibility;
+            yield return _cancel_sells_visibility;
+            yield return _cancel_all_visibility;
+         }
+      }
+
      public string key => GridOrLadderSettingsSelectorKeys.Ladder;

      public void load(LadderSettings settings) {
@@ -128,6 +172,27 @@ namespace mbts.spark {
         _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?
      }

      public LadderSettings get_result() {
@@ -149,6 +214,25 @@ namespace mbts.spark {
         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);
+         clone.day_visible = _day_visibility.show;
+         clone.high_visible = _high_visibility.show;
+         clone.low_visible = _low_visibility.show;
+         clone.open_visible = _open_visibility.show;
+         clone.settle_visible = _settle_visibility.show;
+         clone.volume_visible = _volume_visibility.show;
+         clone.account_visible = _account_visibility.show;
+         clone.tif_visible = _tif_visibility.show;
+         clone.order_type_visible = _order_type_visibility.show;
+         clone.account_position_visible = _account_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();
         return clone;
      }

@@ -276,6 +360,19 @@ namespace mbts.spark {
            };
      }

+      public class OrderEntryPanelItemVisibilityVM : ViewModelBase {
+         readonly Property<bool> _show;
+
+         public OrderEntryPanelItemVisibilityVM(string name) {
+            this.name = name;
+            _show = backing(nameof(show), true);
+         }
+
+         public string name { get; }
+         public bool show { get => _show.Value; set => _show.Value = value; }
+
+      }
+
      public class VolumeColumnVM : ViewModelBase {
         readonly DelegateProperty<bool> _any_visible;
         public VolumeColumnVM() {
@@ -140,6 +140,7 @@
          <Setter Property="VerticalContentAlignment" Value="Top"/>
        </Style>
      </TabControl.ItemContainerStyle>
+      <!-- Fonts and Colors Tab -->
      <TabItem Header="Fonts and Colors" VerticalAlignment="Stretch">
        <Grid>
          <Grid.RowDefinitions>
@@ -232,6 +233,7 @@
          </WrapPanel>
        </Grid>
      </TabItem>
+      <!-- Market Break Lines Tab -->
      <TabItem Header="Market Break Lines" VerticalAlignment="Stretch">
        <Grid>
          <Grid.RowDefinitions>
@@ -350,6 +352,7 @@
          </ItemsControl>
        </Grid>
      </TabItem>
+      <!-- Market Size Tab -->
      <TabItem Header="Market Size Display">
        <Grid DataContext="{Binding size_display}">
          <Grid.RowDefinitions>
@@ -440,6 +443,7 @@
          </GroupBox>
        </Grid>
      </TabItem>
+      <!-- Volume Display Tab -->
      <TabItem Header="Volume Display" VerticalAlignment="Stretch" Visibility="{Binding is_synthetic, Converter={StaticResource FalseVisibilityConverter}}">
        <Grid>
          <Grid.RowDefinitions>
@@ -557,6 +561,7 @@
          </WrapPanel>
        </Grid>
      </TabItem>
+      <!-- Size Presets Tab-->
      <TabItem Header="Size Presets" VerticalAlignment="Stretch">
        <Grid HorizontalAlignment="Left">
          <Grid.RowDefinitions>
@@ -592,6 +597,63 @@
          </Button>
        </Grid>
      </TabItem>
+      <!-- Order Entry Panel Item Control Visbility -->
+      <TabItem Header="Left Panel" VerticalAlignment="Stretch">
+        <Grid HorizontalAlignment="Left" Grid.IsSharedSizeScope="True">
+          <Grid.RowDefinitions>
+            <RowDefinition Height="*"/>
+            <RowDefinition Height="{Binding Source={StaticResource VerticalPush}}"/>
+            <RowDefinition Height="Auto"/>
+          </Grid.RowDefinitions>
+          <ItemsControl Grid.Row="0" ItemsSource="{Binding order_entry_panel_items}" Grid.IsSharedSizeScope="True">
+            <ItemsControl.ItemsPanel>
+              <ItemsPanelTemplate>
+                <UniformGrid Columns="2" Focusable="False"/>
+              </ItemsPanelTemplate>
+            </ItemsControl.ItemsPanel>
+            <ItemsControl.ItemTemplate>
+              <DataTemplate>
+                <Grid>
+                  <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="Auto" SharedSizeGroup="A" />
+                  </Grid.ColumnDefinitions>
+                  <Border Margin="0,5,5,0">
+                    <CheckBox Content="{Binding name}" FlowDirection="RightToLeft" IsChecked="{Binding show}">
+                      <CheckBox.Resources>
+                        <Style TargetType="{x:Type Path}">
+                          <Setter Property="FlowDirection" Value="LeftToRight" />
+                        </Style>
+                      </CheckBox.Resources>
+                    </CheckBox>
+                  </Border>
+                </Grid>
+              </DataTemplate>
+            </ItemsControl.ItemTemplate>
+          </ItemsControl>
+          <!--
+          <ItemsControl ItemsSource="{Binding order_entry_panel_items}">
+            <ItemsControl.ItemsPanel>
+              <ItemsPanelTemplate>
+                <UniformGrid Columns="2" Focusable="False"/>
+              </ItemsPanelTemplate>
+            </ItemsControl.ItemsPanel>
+            <ItemsControl.ItemTemplate>
+              <DataTemplate>
+                <Grid>
+                  <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="Auto"/>
+                    <ColumnDefinition Width="52"/>
+                  </Grid.ColumnDefinitions>
+                  <TextBlock Grid.Column="0" VerticalAlignment="Center" Text="{Binding name}"/>
+                  <CheckBox Grid.Column="1" HorizontalAlignment="Center" VerticalAlignment="Center" IsChecked="{Binding show}"/>
+                </Grid>
+              </DataTemplate>
+            </ItemsControl.ItemTemplate>
+          </ItemsControl>
+          -->
+        </Grid>
+      </TabItem>
+
    </TabControl>
  </Grid>
 </UserControl>
@@ -20,18 +20,24 @@ using System.Windows.Media;

 namespace mbts.spark {
   class LadderVM : DisposableViewModelBase, IWillLetYouKnowWhenIDispose, IKeyListener {
+      static readonly Brush _transparent_status_brush = BTSColors.UI.transparent;
+
      readonly IBus _bus;
      readonly LadderModel _model;
-      readonly Property<double> _high, _low, _change, _open, _settlement, _position;
+      readonly Property<double> _high, _low, _change, _open, _settlement, _position, _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;
      readonly Property<ulong> _volume;
-      readonly Property<bool> _auto_clear;
+      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,
+         _show_cancel_sells, _show_cancel_all, _show_zoom;
      readonly Property<Brush> _bid_background, _bid_foreground, _ask_background, _ask_foreground;
      IWindowSettingsManager<LadderSettings> _settings_manager;
      ulong _misc_time = 0;
      IEqualityComparer<double> _equality;
      Dictionary<double, LadderOrderVM> _slot_price_vs_orders;

-      public LadderVM(IBus bus, LadderModel model, IWindowSettingsManager<LadderSettings> settings_manager) {
+      public LadderVM(IBus bus, LadderModel model, IWindowSettingsManager<LadderSettings> settings_manager, LadderSettings init) {
         _bus = bus;
         _model = model;
         _equality = TickUtils.tick_equality_comparer(_model.security.ContractSpec);
@@ -44,13 +50,23 @@ namespace mbts.spark {
         _change = backing(nameof(change), double.NaN);
         _open = backing(nameof(open), double.NaN);
         _settlement = backing(nameof(settlement), double.NaN);
+         // init window-specific settings: these properties should not observe settings updates; they are independent from the settings dialog, so it doesn't make sense that the settings dialog should cause them to change.
+         var ws = init.get_window_specifics();
+         _orders_column_width = backing(nameof(orders_column_width), ws.orders_column_width);
+         _bid_column_width = backing(nameof(bid_column_width), ws.bid_column_width);
+         _price_column_width = backing(nameof(price_column_width), ws.price_column_width);
+         _ask_column_width = backing(nameof(ask_column_width), ws.ask_column_width);
+         _last_column_width = backing(nameof(last_column_width), ws.last_column_width);
+         _volume_column_width = backing(nameof(volume_column_width), ws.volume_column_width);
+         _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);
         _status = backing(nameof(status_message), "");
-         _status_brush = backing(nameof(status_background), (Brush)BTSColors.UI.spark_menu_background);
+         _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());
@@ -58,7 +74,31 @@ namespace mbts.spark {
         _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);
+
         //
+         //_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);
         cancel_command = new AsyncCommand<LadderModel.CancelType>(_model.cancel_orders, true);
@@ -67,11 +107,11 @@ namespace mbts.spark {
         settings_command = new DialogCommand(() => {
         var vm = new WindowSettingsDialogVM<LadderSettings, LadderSettingsVM>(
               settings_manager, s => s.ladder, UserSettings.FileExtensions.LADDER,
-               s => {
-                  var svm = new LadderSettingsVM(security.ContractCase == Security.ContractOneofCase.Synthetic);
+               s => { 
+                  var svm = new LadderSettingsVM(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}'"
@@ -202,7 +242,7 @@ namespace mbts.spark {
            await Task.Delay(TimeSpan.FromSeconds(5));
            if (_status.Value == a.message) {
               _status.set("");
-               _status_brush.set(BTSColors.UI.spark_menu_background);
+               _status_brush.set(_transparent_status_brush);
            }
         }
      }
@@ -233,16 +273,41 @@ namespace mbts.spark {
      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 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 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); }
+      public uint bid_column_width { get => _bid_column_width.Value; set => _bid_column_width.set(value); }
+      public uint price_column_width { get => _price_column_width.Value; set => _price_column_width.set(value); }
+      public uint ask_column_width { get => _ask_column_width.Value; set => _ask_column_width.set(value); }
+      public uint last_column_width { get => _last_column_width.Value; set => _last_column_width.set(value); }
+      public uint volume_column_width { get => _volume_column_width.Value; set => _volume_column_width.set(value); }
      internal LadderModel model => _model;
      internal IObservable<LadderSettings> settings => _settings_manager.subscribe_current();

      public LadderSettings get_save_state() {
-         // TODO: save an actual OrderDefinition to preserve order params.
-         if (_settings_manager.instance_settings == null)
-            return null;
-         var settings_clone = SparkUtils.clone_proto(_settings_manager.instance_settings);
-         settings_clone.default_order_type = order_properties_vm.selected_order_type?.order_type ?? settings_clone.default_order_type;
-         return settings_clone;
+         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));
+         state.use_defaults = _settings_manager.instance_settings == null;
+         return state;
      }

      public void key_down(KeyEventArgs e) {
@@ -299,6 +364,7 @@ namespace mbts.spark {
               _change.set(mid - md.settlement_price);
            }
            _volume.set(volume);
+            _misc_time = _model.md.misc_timestamp;
         }
      }

@@ -1,16 +1,20 @@
-<UserControl x:Class="mbts.spark.LadderView"
-             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-             xmlns:mbts="clr-namespace:mbts.ui"
-             xmlns:controls="clr-namespace:mbts.ui.controls"
-             xmlns:spark="clr-namespace:mbts.spark"
-             xmlns:uag="clr-namespace:mbts.ui.spark.algo"
-             xmlns:converters="clr-namespace:mbts.ui.converters"
-             xmlns:txt="clr-namespace:mbts.ui.utility.text"
-             Height="600"
-             Width="420"
-             Background="{x:Static mbts:BTSColors.common_background_brush}"
-             TextElement.FontSize="{x:Static mbts:FontSizes.Small}">
+<UserControl
+  x:Class="mbts.spark.LadderView"
+  x:ClassModifier="internal"
+  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+  xmlns:mbts="clr-namespace:mbts.ui"
+  xmlns:controls="clr-namespace:mbts.ui.controls"
+  xmlns:spark="clr-namespace:mbts.spark"
+  xmlns:uag="clr-namespace:mbts.ui.spark.algo"
+  xmlns:converters="clr-namespace:mbts.ui.converters"
+  xmlns:txt="clr-namespace:mbts.ui.utility.text"
+  xmlns:sys="clr-namespace:System;assembly=mscorlib"
+  Height="600"
+  Width="420"
+  Background="{x:Static mbts:BTSColors.common_background_brush}"
+  TextElement.FontSize="{x:Static mbts:FontSizes.Small}"
+>
  <UserControl.Resources>
    <ResourceDictionary>
      <ResourceDictionary.MergedDictionaries>
@@ -27,6 +31,13 @@
      </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"  />
+      <converters:ResponsiveTextConverter x:Key="LowTextConverter" LongText="Low:" ShortText="L:" Threshold="99" />
+      <converters:ResponsiveTextConverter x:Key="OpenTextConverter" LongText="Open:" ShortText="O:" Threshold="99" />
+      <converters:ResponsiveTextConverter x:Key="SettleTextConverter" LongText="Settle:" ShortText="S:" Threshold="99" />
+      <converters:ResponsiveTextConverter x:Key="VolumeTextConverter" LongText="Volume:" ShortText="V:" Threshold="99" />
      <Style TargetType="GridViewColumnHeader">
        <Setter Property="Background" Value="{mbts:BTSColor header}"/>
        <Setter Property="Foreground" Value="{mbts:BTSColor header_text}"/>
@@ -34,6 +45,7 @@
        <Setter Property="BorderThickness" Value="0,0,1,0"/>
        <Setter Property="HorizontalContentAlignment" Value="Center" />
        <Setter Property="Height" Value="23" />
+        <Setter Property="MinWidth" Value="30" />
        <Setter Property="Template">
          <Setter.Value>
            <ControlTemplate TargetType="{x:Type GridViewColumnHeader}">
@@ -57,8 +69,8 @@
                    </Border>
                  </Grid>
                </Border>
-                <Canvas>
-                  <Thumb x:Name="PART_HeaderGripper">
+                <Canvas MinWidth="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=MinWidth, Mode=OneTime}">
+                  <Thumb x:Name="PART_HeaderGripper" DragDelta="Thumb_DragDelta">
                    <Thumb.Style>
                      <Style TargetType="{x:Type Thumb}">
                        <Setter Property="Canvas.Right" Value="-9"/>
@@ -123,7 +135,7 @@
      <Style x:Key="LadderMenuButton" TargetType="Button">
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="HorizontalAlignment" Value="Stretch"/>
-        <Setter Property="Margin" Value="5,0,5,5"/>
+        <Setter Property="Margin" Value="2,0,2,5"/>
        <Setter Property="Padding" Value="2"/>
      </Style>
      <Style x:Key="CancelBuys" TargetType="Button" BasedOn="{StaticResource LadderMenuButton}">
@@ -244,8 +256,7 @@
                Background="{mbts:BTSColor UI.Button.normal_background}"
                Padding="{TemplateBinding Padding}"
                SnapsToDevicePixels="True"
-                VerticalAlignment="Bottom"
-                Margin="0,0,0,12">
+                Margin="2,0,2,10">
                <ContentPresenter 
                  HorizontalAlignment="Center"
                  VerticalAlignment="Center"
@@ -263,108 +274,166 @@
          </Setter.Value>
        </Setter>
      </Style>
+      <sys:Double x:Key="MaxZoomFactor">1.5</sys:Double>
+      <sys:Double x:Key="MinZoomFactor">0.5</sys:Double>
    </ResourceDictionary>
  </UserControl.Resources>
  <AdornerDecorator>
    <Grid x:Name="_root">
-    <Grid.ColumnDefinitions>
-      <ColumnDefinition Width="112"/>
-      <ColumnDefinition Width="2"/>
-      <ColumnDefinition/>
-    </Grid.ColumnDefinitions>
-    <Grid.RowDefinitions>
-      <RowDefinition Height="Auto" />
-      <RowDefinition Height="*" />
-    </Grid.RowDefinitions>
-    <Grid RowSpan="2" Background="{mbts:BTSColor UI.spark_menu_background}">
+      <Grid.LayoutTransform>
+        <ScaleTransform CenterX="0" CenterY="0"
+            ScaleX="{Binding ElementName=_ui_scaler, Path=Value}"
+            ScaleY="{Binding ElementName=_ui_scaler, Path=Value}"
+        />
+      </Grid.LayoutTransform>
+      <Grid.ColumnDefinitions>
+        <ColumnDefinition Width="{Binding left_panel_width, Mode=TwoWay, Converter={StaticResource GridLengthPixelConverter}}" 
+                          MinWidth="60" MaxWidth="150"/>
+        <ColumnDefinition/>
+      </Grid.ColumnDefinitions>
      <Grid.RowDefinitions>
-        <RowDefinition Height="Auto"/>
-        <RowDefinition/>
+        <RowDefinition Height="Auto" />
+        <RowDefinition Height="*" />
      </Grid.RowDefinitions>
-      <StackPanel Margin="5,0">
-        <StackPanel.Resources>
-          <Style TargetType="Button" BasedOn="{StaticResource {x:Type Button}}">
-            <Setter Property="HorizontalAlignment" Value="Stretch" />
-          </Style>
-        </StackPanel.Resources>
-        <Grid Margin="8,4,0,0">
+      <ScrollViewer Grid.Row="0" Grid.RowSpan="2" VerticalScrollBarVisibility="Hidden">
+        <Grid RowSpan="2" Background="{mbts:BTSColor UI.spark_menu_background}">
          <Grid.RowDefinitions>
-            <RowDefinition Height="Auto"/>
-            <RowDefinition Height="4"/>
-            <RowDefinition Height="Auto"/>
-            <RowDefinition Height="4"/>
-            <RowDefinition Height="Auto"/>
-            <RowDefinition Height="4"/>
-            <RowDefinition Height="Auto"/>
-            <RowDefinition Height="4"/>
-            <RowDefinition Height="Auto"/>
-            <RowDefinition Height="4"/>
-            <RowDefinition Height="Auto"/>
-            <RowDefinition Height="Auto"/>
+            <RowDefinition Height="*"/>
+            <RowDefinition/>
          </Grid.RowDefinitions>
-          <Grid.ColumnDefinitions>
-            <ColumnDefinition Width="Auto"/>
-            <ColumnDefinition Width="6"/>
-            <ColumnDefinition Width="Auto"/>
-          </Grid.ColumnDefinitions>
-          <TextBlock Grid.Column="0" Grid.Row="0" Text="Day"/>
-          <TextBlock Grid.Column="0" Grid.Row="2" Text="High"/>
-          <TextBlock Grid.Column="0" Grid.Row="4" Text="Low"/>
-          <TextBlock Grid.Column="0" Grid.Row="6" Text="Open"/>
-          <TextBlock Grid.Column="0" Grid.Row="8" Text="Settle"/>
-          <TextBlock Grid.Column="0" Grid.Row="10" Text="Volume"/>
-
-          <TextBlock Grid.Column="2" Grid.Row="0" Foreground="{Binding change, Converter={StaticResource NumericSignBrushConverter}}" FontWeight="Bold">
-            <TextBlock.Text>
-              <MultiBinding Converter="{StaticResource TickDisplayConverter}" Mode="OneWay">
-                <Binding Path="change"/>
-                <Binding Path="security.ContractSpec"/>
-              </MultiBinding>
-            </TextBlock.Text>
-          </TextBlock>
-          <TextBlock Grid.Column="2" Grid.Row="2" Foreground="{mbts:BTSColor UI.default_text}" FontWeight="Bold">
-            <TextBlock.Text>
-              <MultiBinding Converter="{StaticResource TickDisplayConverter}" Mode="OneWay">
-                <Binding Path="high"/>
-                <Binding Path="security.ContractSpec"/>
-              </MultiBinding>
-            </TextBlock.Text>
-          </TextBlock>
-          <TextBlock Grid.Column="2" Grid.Row="4" Foreground="{mbts:BTSColor UI.default_text}" FontWeight="Bold">
-            <TextBlock.Text>
-              <MultiBinding Converter="{StaticResource TickDisplayConverter}" Mode="OneWay">
-                <Binding Path="low"/>
-                <Binding Path="security.ContractSpec"/>
-              </MultiBinding>
-            </TextBlock.Text>
-          </TextBlock>
-          <TextBlock Grid.Column="2" Grid.Row="6" FontWeight="Bold">
-            <TextBlock.Text>
-              <MultiBinding Converter="{StaticResource TickDisplayConverter}" Mode="OneWay">
-                <Binding Path="open"/>
-                <Binding Path="security.ContractSpec"/>
-              </MultiBinding>
-            </TextBlock.Text>
-          </TextBlock>
-          <TextBlock Grid.Column="2" Grid.Row="8" FontWeight="Bold">
-            <TextBlock.Text>
-              <MultiBinding Converter="{StaticResource TickDisplayConverter}" Mode="OneWay">
-                <Binding Path="settlement"/>
-                <Binding Path="security.ContractSpec"/>
-              </MultiBinding>
-            </TextBlock.Text>
-          </TextBlock>
-          <TextBlock Grid.Column="2" Grid.Row="10" Text="{Binding volume, Mode=OneWay}" FontWeight="Bold" />
-        </Grid>
-        <ComboBox DataContext="{Binding order_properties_vm}" Margin="2,10,2,2" ItemsSource="{Binding accounts}" SelectedItem="{Binding selected_account}"/>
-        <ComboBox DataContext="{Binding order_properties_vm}" ItemsSource="{Binding time_in_forces}" SelectedItem="{Binding selected_time_in_force}" Margin="2">
-          <ComboBox.ItemTemplate>
-            <DataTemplate>
-                <TextBlock Text="{Binding Converter={StaticResource casing_converter}, ConverterParameter=Upper}" />
-              </DataTemplate>           
-          </ComboBox.ItemTemplate>
-        </ComboBox>
-        <uag:OrderDetailsPopupControl
+          <StackPanel Margin="2,0,5,0">
+            <StackPanel.Resources>
+              <Style TargetType="Button" BasedOn="{StaticResource {x:Type Button}}">
+                <Setter Property="HorizontalAlignment" Value="Stretch" />
+              </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}}"/>
+            </StackPanel>
+            <Grid Margin="2,4,2,0">
+              <Grid.RowDefinitions>
+                <RowDefinition Height="Auto"/>
+                <RowDefinition Height="Auto"/>
+                <RowDefinition Height="Auto"/>
+                <RowDefinition Height="Auto"/>
+                <RowDefinition Height="Auto"/>
+                <RowDefinition Height="Auto"/>
+                <RowDefinition Height="Auto"/>
+              </Grid.RowDefinitions>
+              <Grid.ColumnDefinitions>
+                <ColumnDefinition Width="Auto"/>
+                <ColumnDefinition Width="6"/>
+                <ColumnDefinition Width="Auto"/>
+              </Grid.ColumnDefinitions>
+              <!-- Day -->
+              <TextBlock Grid.Column="0" Grid.Row="0"
+                     Text="{Binding left_panel_width, Converter={StaticResource DayTextConverter}}"
+                     Margin="0,0,0,4"
+                     Visibility="{Binding show_day, Converter={StaticResource BooleanToVisibilityConverter}}"/>
+              <TextBlock Grid.Column="2" Grid.Row="0" FontWeight="Bold"
+                     Margin="0,0,0,4"
+                     Foreground="{Binding change, Converter={StaticResource NumericSignBrushConverter}}" 
+                     Visibility="{Binding show_day, Converter={StaticResource BooleanToVisibilityConverter}}">
+                <TextBlock.Text>
+                  <MultiBinding Converter="{StaticResource TickDisplayConverter}" Mode="OneWay">
+                    <Binding Path="change"/>
+                    <Binding Path="security.ContractSpec"/>
+                  </MultiBinding>
+                </TextBlock.Text>
+              </TextBlock>
+              <!-- High -->
+              <TextBlock Grid.Column="0" Grid.Row="1"
+                     Text="{Binding left_panel_width, Converter={StaticResource HighTextConverter}}"
+                     Margin="0,0,0,4"
+                     Visibility="{Binding show_high, Converter={StaticResource BooleanToVisibilityConverter}}"/>
+              <TextBlock Grid.Column="2" Grid.Row="1" Foreground="{mbts:BTSColor UI.default_text}" FontWeight="Bold"
+                     Margin="0,0,0,4"
+                     Visibility="{Binding show_high, Converter={StaticResource BooleanToVisibilityConverter}}">
+                <TextBlock.Text>
+                  <MultiBinding Converter="{StaticResource TickDisplayConverter}" Mode="OneWay">
+                    <Binding Path="high"/>
+                    <Binding Path="security.ContractSpec"/>
+                  </MultiBinding>
+                </TextBlock.Text>
+              </TextBlock>
+              <!-- Low -->
+              <TextBlock Grid.Column="0" Grid.Row="2"
+                     Text="{Binding left_panel_width, Converter={StaticResource LowTextConverter}}"
+                     Margin="0,0,0,4"
+                     Visibility="{Binding show_low, Converter={StaticResource BooleanToVisibilityConverter}}"/>
+              <TextBlock Grid.Column="2" Grid.Row="2" Foreground="{mbts:BTSColor UI.default_text}" FontWeight="Bold"
+                     Margin="0,0,0,4"
+                     Visibility="{Binding show_low, Converter={StaticResource BooleanToVisibilityConverter}}">
+                <TextBlock.Text>
+                  <MultiBinding Converter="{StaticResource TickDisplayConverter}" Mode="OneWay">
+                    <Binding Path="low"/>
+                    <Binding Path="security.ContractSpec"/>
+                  </MultiBinding>
+                </TextBlock.Text>
+              </TextBlock>
+              <!-- Open -->
+              <TextBlock Grid.Column="0" Grid.Row="3"
+                     Text="{Binding left_panel_width, Converter={StaticResource OpenTextConverter}}"
+                     Margin="0,0,0,4"
+                     Visibility="{Binding show_open, Converter={StaticResource BooleanToVisibilityConverter}}"/>
+              <TextBlock Grid.Column="2" Grid.Row="3" FontWeight="Bold"
+                     Margin="0,0,0,4"
+                     Visibility="{Binding show_open, Converter={StaticResource BooleanToVisibilityConverter}}">
+                <TextBlock.Text>
+                  <MultiBinding Converter="{StaticResource TickDisplayConverter}" Mode="OneWay">
+                    <Binding Path="open"/>
+                    <Binding Path="security.ContractSpec"/>
+                  </MultiBinding>
+                </TextBlock.Text>
+              </TextBlock>
+              <!-- Settle -->
+              <TextBlock Grid.Column="0" Grid.Row="4"
+                     Text="{Binding left_panel_width, Converter={StaticResource SettleTextConverter}}"
+                     Margin="0,0,0,4"
+                     Visibility="{Binding show_settle, Converter={StaticResource BooleanToVisibilityConverter}}"/>
+              <TextBlock Grid.Column="2" Grid.Row="4" FontWeight="Bold"
+                     Margin="0,0,0,4"
+                     Visibility="{Binding show_settle, Converter={StaticResource BooleanToVisibilityConverter}}">
+                <TextBlock.Text>
+                  <MultiBinding Converter="{StaticResource TickDisplayConverter}" Mode="OneWay">
+                    <Binding Path="settlement"/>
+                    <Binding Path="security.ContractSpec"/>
+                  </MultiBinding>
+                </TextBlock.Text>
+              </TextBlock>
+              <!-- Volume -->
+              <TextBlock Grid.Column="0" Grid.Row="5"
+                     Text="{Binding left_panel_width, Converter={StaticResource VolumeTextConverter}}"
+                     Margin="0,0,0,4"
+                     Visibility="{Binding show_volume, Converter={StaticResource BooleanToVisibilityConverter}}"/>
+              <TextBlock Grid.Column="2" Grid.Row="5" Text="{Binding volume, Mode=OneWay}" FontWeight="Bold"
+                     Margin="0,0,0,4"
+                     Visibility="{Binding show_volume, Converter={StaticResource BooleanToVisibilityConverter}}"/>
+            </Grid>
+            <!-- Account combobox -->
+            <ComboBox DataContext="{Binding order_properties_vm}" Margin="2,10,2,2" 
+                  ItemsSource="{Binding accounts}" SelectedItem="{Binding selected_account}"
+                  Visibility="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}},
+                              Path = DataContext.show_account,
+                              Converter={StaticResource BooleanToVisibilityConverter}}"/>
+            <!-- TIF combobox-->
+            <ComboBox DataContext="{Binding order_properties_vm}" ItemsSource="{Binding time_in_forces}" 
+                  SelectedItem="{Binding selected_time_in_force}" Margin="2"
+                  Visibility="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}},
+                              Path = DataContext.show_tif,
+                              Converter={StaticResource BooleanToVisibilityConverter}}">
+              <ComboBox.ItemTemplate>
+                <DataTemplate>
+                  <TextBlock Text="{Binding Converter={StaticResource casing_converter}, ConverterParameter=Upper}" />
+                </DataTemplate>
+              </ComboBox.ItemTemplate>
+            </ComboBox>
+            <!-- Order Type combobox -->
+            <uag:OrderDetailsPopupControl
          DataContext="{Binding order_properties_vm}"
          Margin="2"
          ExpandDirection="Left"
@@ -372,19 +441,25 @@
          IsOpen="{Binding selected_order_type.editable_properties_open, FallbackValue=False}"
          ItemsSource="{Binding order_types}"
          SelectedItem="{Binding selected_order_type}"
+          Visibility="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}},
+                      Path = DataContext.show_order_type,
+                      Converter={StaticResource BooleanToVisibilityConverter}}"
        />
-        <Button
+            <!-- Position into qty button -->
+            <Button
          Margin="2"
          Command="{Binding position_click_command}"
          Content="{Binding position, Converter={StaticResource PositionTextConverter}}"
          FontWeight="Bold"
          Foreground="{Binding position, Converter={StaticResource NumericSignBrushConverter}}"
+          Visibility="{Binding show_account_position, Converter={StaticResource BooleanToVisibilityConverter}}"
        >
-          <Button.ToolTip>
-            <TextBlock Text="{Binding order_properties_vm.selected_account, StringFormat='{}{0} total position (click to copy to size)'}"/>
-          </Button.ToolTip>
-        </Button>
-        <TextBox
+              <Button.ToolTip>
+                <TextBlock Text="{Binding order_properties_vm.selected_account, StringFormat='{}{0} total position (click to copy to size)'}"/>
+              </Button.ToolTip>
+            </Button>
+            <!-- Qty textbox -->
+            <TextBox
          mbts:TextBoxBehavior.InputFilter="{mbts:RegexInputFilter Regex={x:Static Member=Integer, MemberType={mbts:Nested txt:TextUtils.RegexFilters}}}"
          mbts:TextBoxBehavior.IncrementDecrementOnMouseClick="True"
          HorizontalContentAlignment="Right"
@@ -392,42 +467,64 @@
          Text="{Binding size_calculator.value, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
          ContextMenu="{x:Null}"
        />
-        <ItemsControl ItemsSource="{Binding size_calculator.buttons}" Focusable="False">
-          <ItemsControl.ItemsPanel>
-            <ItemsPanelTemplate>
-              <UniformGrid Columns="2" Focusable="False"/>
-            </ItemsPanelTemplate>
-          </ItemsControl.ItemsPanel>
-          <ItemsControl.ItemTemplate>
-            <DataTemplate>
-              <Button Margin="2" Command="{Binding Path=DataContext.size_calculator.click, RelativeSource={RelativeSource AncestorType=ItemsControl}}" CommandParameter="{Binding}" Content="{Binding}" Focusable="False"/>
-            </DataTemplate>
-          </ItemsControl.ItemTemplate>
-        </ItemsControl>
-        <Button Margin="2" HorizontalAlignment="Stretch" Command="{Binding size_calculator.clear}">Clear</Button>
-        <!-- reset to defaults after order -->
-        <CheckBox Margin="2" IsChecked="{Binding auto_clear}">Auto Clear</CheckBox>
-      </StackPanel>
-      <Grid Grid.Row="1">
-        <Grid.RowDefinitions>
-          <RowDefinition Height="Auto"/>
-          <RowDefinition/>
-        </Grid.RowDefinitions>
-        <StackPanel Margin="0,17,0,0" VerticalAlignment="Top">
-          <Button Command="{Binding cancel_command}" CommandParameter="Bids" Style="{StaticResource CancelBuys}"/>
-          <Button Command="{Binding cancel_command}" CommandParameter="Asks" Style="{StaticResource CancelSells}"/>
-          <Button Command="{Binding cancel_command}" CommandParameter="All" Style="{StaticResource CancelAll}"/>
-        </StackPanel>
-        <Button Grid.Row="1" HorizontalContentAlignment="Stretch" Command="{Binding settings_command}" Style="{StaticResource SettingsButton}" />
-      </Grid>
-    </Grid>
-    <Border Grid.Column="2" HorizontalAlignment="Stretch">
-      <GridViewHeaderRowPresenter x:Name="_column_headers_presenter" AllowsColumnReorder="False"/>
-    </Border>
-    <spark:LadderGridHost x:Name="_ladder" Grid.Column="2" Grid.Row="1" 
-      Command="{Binding send_order_command}" 
-      Orders="{Binding orders}">
-      <spark:LadderGridHost.Resources>
+            <!-- Qty quick buttons -->
+            <ItemsControl ItemsSource="{Binding size_calculator.buttons}" Focusable="False"
+                      Visibility="{Binding show_size_preset, Converter={StaticResource BooleanToVisibilityConverter}}"
+                      >
+              <ItemsControl.ItemsPanel>
+                <ItemsPanelTemplate>
+                  <UniformGrid Columns="2" Focusable="False"/>
+                </ItemsPanelTemplate>
+              </ItemsControl.ItemsPanel>
+              <ItemsControl.ItemTemplate>
+                <DataTemplate>
+                  <Button Margin="2" Command="{Binding Path=DataContext.size_calculator.click, RelativeSource={RelativeSource AncestorType=ItemsControl}}" CommandParameter="{Binding}" Content="{Binding}" Focusable="False"/>
+                </DataTemplate>
+              </ItemsControl.ItemTemplate>
+            </ItemsControl>
+            <!-- Clear button -->
+            <Button Margin="2" HorizontalAlignment="Stretch" Command="{Binding size_calculator.clear}"
+                    Visibility="{Binding show_clear, Converter={StaticResource BooleanToVisibilityConverter}}">Clear</Button>
+            <!-- Auto Clear button - reset to defaults after order -->
+            <CheckBox Margin="2" IsChecked="{Binding auto_clear}"
+                  Visibility="{Binding show_auto_clear, Converter={StaticResource BooleanToVisibilityConverter}}">
+              Auto Clear
+            </CheckBox>
+            <StackPanel Margin="0,17,0,0" VerticalAlignment="Top">
+              <!-- Cancel Buttons -->
+              <Button Command="{Binding cancel_command}" CommandParameter="Bids" Style="{StaticResource CancelBuys}"
+                  Visibility="{Binding show_cancel_buys, Converter={StaticResource BooleanToVisibilityConverter}}"/>
+              <Button Command="{Binding cancel_command}" CommandParameter="Asks" Style="{StaticResource CancelSells}"
+                  Visibility="{Binding show_cancel_sells, Converter={StaticResource BooleanToVisibilityConverter}}"/>
+              <Button Command="{Binding cancel_command}" CommandParameter="All" Style="{StaticResource CancelAll}"
+                  Visibility="{Binding show_cancel_all, Converter={StaticResource BooleanToVisibilityConverter}}"/>
+            </StackPanel>
+            <StackPanel Grid.Row="1" Margin="0,17,0,0" VerticalAlignment="Bottom">
+              <!-- Settings Button -->
+              <Button Command="{Binding settings_command}" Style="{StaticResource SettingsButton}"/>
+            </StackPanel>
+          </StackPanel>
+        </Grid>
+      </ScrollViewer>
+      <!-- Ladder Column Headers -->
+      <Border Grid.Column="2" HorizontalAlignment="Stretch">
+        <GridViewHeaderRowPresenter x:Name="_column_headers_presenter" AllowsColumnReorder="False" />
+      </Border>
+      <!-- LadderGridHost -->
+      <spark:LadderGridHost
+        x:Name="_ladder"
+        Grid.Column="2"
+        Grid.Row="1" 
+        Command="{Binding send_order_command}" 
+        Orders="{Binding orders}"
+        orders_column_width="{Binding orders_column_width, Mode=TwoWay}"
+        bid_column_width="{Binding bid_column_width, Mode=TwoWay}"
+        price_column_width="{Binding price_column_width, Mode=TwoWay}"
+        ask_column_width="{Binding ask_column_width, Mode=TwoWay}"
+        LastColumnWidth="{Binding last_column_width, Mode=TwoWay}"
+        VolumeColumnWidth="{Binding volume_column_width, Mode=TwoWay}"
+      >
+        <spark:LadderGridHost.Resources>
        <Style TargetType="controls:Badge">
          <Setter Property="Background" Value="{Binding background}" />
          <Setter Property="BorderBrush" Value="{Binding border}" />
@@ -436,29 +533,12 @@
          <Setter Property="Foreground" Value="{Binding foreground}"/>
          <Setter Property="TextLines" Value="{Binding text_lines}" />
          <Setter Property="Width" Value="{x:Static controls:Badge.DefaultWidth}"/>
-          <Setter Property="ToolTip" Value="{Binding description}" />
          <Setter Property="IsExchangeOrder" Value="{Binding is_exchange_order}" />
          <Setter Property="HasMultipleOrdersAtLevel" Value="{Binding has_multiple_orders_at_same_level}" />
          <Setter Property="IsHedgeOrder" Value="{Binding is_hedge_order}" />
          <Setter Property="ParentAlgoType" Value="{Binding parent_algo_type}" />
          <Setter Property="ParentAlgoTypeBrush" Value="{Binding parent_algo_type_brush}" />
          <Setter Property="Cursor" Value="Hand"/>
-          <Setter Property="ContextMenu">
-            <Setter.Value>
-              <ContextMenu>
-                  <MenuItem Command="{Binding cancel_command}" Header="Cancel">
-                    <MenuItem.Icon>
-                      <Image Source="{StaticResource CancelSelected}" />
-                    </MenuItem.Icon>
-                  </MenuItem>
-                  <MenuItem Command="{Binding detach_command}" Header="Detach">
-                  <MenuItem.Icon>
-                    <Image Source="{StaticResource ModifyOrder}" />
-                  </MenuItem.Icon>
-                </MenuItem>
-                </ContextMenu>
-            </Setter.Value>
-          </Setter>
          <Style.Triggers>
            <Trigger Property="IsMouseOver" Value="True">
              <Setter Property="Background" Value="{Binding hoverbackground}" />
@@ -467,7 +547,7 @@
        </Style>
      </spark:LadderGridHost.Resources>
    </spark:LadderGridHost>
-    <spark:RecenterCountdown Grid.Column="2" Grid.Row="1" Margin="0,0,18,0"
+      <spark:RecenterCountdown Grid.Column="2" Grid.Row="1" Margin="0,0,18,0"
                             VerticalAlignment="Bottom" HorizontalAlignment="Right" 
                             Width="30" Height="30"
                             Mode="Pie" Delay="0:0:10"
@@ -483,14 +563,19 @@
        <Pen Thickness="0" Brush="MediumPurple" />
      </spark:RecenterCountdown.PieStroke>
    </spark:RecenterCountdown>
-                            
-    <Button x:Name="_status" Grid.ColumnSpan="4" Grid.Row="1" VerticalAlignment="Bottom" HorizontalAlignment="Left" Command="{Binding status_click_command}">
-      <Button.Template>
-        <ControlTemplate>
-          <TextBlock Text="{Binding status_message}" Background="{Binding status_background}" Padding="5,0" />
-        </ControlTemplate>
-      </Button.Template>
-    </Button>
-  </Grid>
+      <!-- Since the GridSplitter will share a cell with other elements,
+      we add it in toward the end, but we still want the ladder status
+      message to have the topmost Z order
+      -->
+      <GridSplitter Grid.Column="0" Grid.RowSpan="2" Width="5" />
+      <!-- Ladder Status message -->                        
+      <Button x:Name="_status" Grid.ColumnSpan="4" Grid.Row="1" VerticalAlignment="Bottom" HorizontalAlignment="Left" Command="{Binding status_click_command}">
+        <Button.Template>
+          <ControlTemplate>
+            <TextBlock Text="{Binding status_message}" Background="{Binding status_background}" Padding="5,0" />
+          </ControlTemplate>
+        </Button.Template>
+      </Button>
+    </Grid>
  </AdornerDecorator>
 </UserControl>
@@ -3,10 +3,14 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Windows;
 using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
 using System.Windows.Data;
+using System.Windows.Input;

 namespace mbts.spark {
-   public partial class LadderView : UserControl {
+   partial class LadderView : UserControl {
+      readonly double _max_zoom, _min_zoom;
+
      internal LadderView(LadderVM vm) {
         InitializeComponent();
         _column_headers_presenter.Columns = new GridViewColumnCollection();
@@ -15,12 +19,87 @@ 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;
      }

+
+
+      // (Left|Right) CTRL + Wheel to zoom
+      // This is neat b/c the user doesn't even need to have the slider visible to zoom
+      private void LadderView_PreviewMouseWheel(object sender, System.Windows.Input.MouseWheelEventArgs e) {
+         base.OnPreviewMouseWheel(e);
+         if (Keyboard.IsKeyDown(Key.LeftCtrl) || Keyboard.IsKeyDown(Key.RightCtrl)) {
+            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) {
+               _ui_scaler.Value = proposed_scaler_value;
+            }
+         }
+      }
+
+      // (Left|Right) CTRL + Wheel Click to reset
+      private void LadderView_PreviewMouseDown(object sender, MouseButtonEventArgs e) {
+         base.OnPreviewMouseDown(e);
+         if (Keyboard.IsKeyDown(Key.LeftCtrl) || Keyboard.IsKeyDown(Key.RightCtrl)) {
+            if (e.MiddleButton == MouseButtonState.Pressed) {
+               _ui_scaler_MouseDoubleClick(_ui_scaler, e);
+            }
+         }
+      }
+
+      // Double click on scaler itself to reset
+      private void _ui_scaler_MouseDoubleClick(object sender, System.Windows.Input.MouseButtonEventArgs e) {
+         if (sender is Slider _the_slider) {
+            _the_slider.Value = 1.0;
+         }
+      }
+
+
      private void datacontext_changed(object sender, DependencyPropertyChangedEventArgs e) {
         this.vm = DataContext as LadderVM;
      }

+      // I found this on StackOverflow (and the XAML) and thought it was a neat
+      // way of enforcing a MinWidth on the columns. This is so that the columns
+      // cannot be resized to nothing with the mouse.
+      private void Thumb_DragDelta(object sender, System.Windows.Controls.Primitives.DragDeltaEventArgs e) {
+         if (sender != null) {
+            DependencyObject parent = sender as DependencyObject;
+            if (parent != null) {
+               try {
+                  do {
+                     parent = System.Windows.Media.VisualTreeHelper.GetParent(parent as DependencyObject);
+                  } while (parent.GetType() != typeof(Canvas));
+
+                  Canvas canvas = parent as Canvas;
+                  if (canvas != null) {
+                     if (canvas.ActualWidth + e.HorizontalChange < canvas.MinWidth) {
+                        e.Handled = true;
+                     }
+                  }
+               } catch {
+               }
+            }
+         }
+      }
+
+
      internal LadderVM vm { get; private set; }

      protected override void OnDragOver(DragEventArgs e) {
@@ -40,31 +119,31 @@ namespace mbts.spark {
            switch (type) {
               case LadderGridHost.ColumnType.Order:
                  header = "Orders";
-                  width_prop = nameof(LadderGridHost.orders_column_width);
+                  width_prop = nameof(LadderVM.orders_column_width);
                  break;
               case LadderGridHost.ColumnType.Bid:
                  header = "Bid";
-                  width_prop = nameof(LadderGridHost.bid_column_width);
+                  width_prop = nameof(LadderVM.bid_column_width);
                  break;
               case LadderGridHost.ColumnType.Price:
                  header = "Price";
-                  width_prop = nameof(LadderGridHost.price_column_width);
+                  width_prop = nameof(LadderVM.price_column_width);
                  break;
               case LadderGridHost.ColumnType.Ask:
                  header = "Ask";
-                  width_prop = nameof(LadderGridHost.ask_column_width);
+                  width_prop = nameof(LadderVM.ask_column_width);
                  break;
               case LadderGridHost.ColumnType.Volume:
                  header = "Volume";
-                  width_prop = nameof(LadderGridHost.VolumeColumnWidth);
+                  width_prop = nameof(LadderVM.volume_column_width);
                  break;
               case LadderGridHost.ColumnType.Last:
                  header = "Last";
-                  width_prop = nameof(LadderGridHost.LastColumnWidth);
+                  width_prop = nameof(LadderVM.last_column_width);
                  break;
               default: throw ExceptionBuilder.Argument.unexpected_case(type, nameof(type));
            }
-            return _create(host, header, width_prop);
+            return _create(host, header, $"DataContext.{width_prop}");
         }

         static GridViewColumn _create(LadderGridHost host, string header, string width_prop) {
@@ -77,5 +156,6 @@ namespace mbts.spark {
            return gvc;
         }
      }
+
   }
 }
@@ -28,31 +28,10 @@ namespace mbts.spark {
      static readonly int sod_hh = (int)config.Configuration.get<bts.config.SODTime>().sod_hh;
      static readonly int sod_mm = (int)config.Configuration.get<bts.config.SODTime>().sod_mm;
      static readonly TimeZoneInfo central_tzi = TimeZoneInfo.FindSystemTimeZoneById(cst_id);
-      static readonly DateTime _start_of_trading_day_utc;
-      static readonly DateTime _adjusted_central_sod;
-
-
-      static readonly DateTime unadjusted_central_sod = TimeZoneInfo.ConvertTimeFromUtc(
-         DateTime.UtcNow.Date.Add(new TimeSpan(sod_hh, sod_mm, 0)),
-         central_tzi
-         );

      static MarketSchedule() {
         var cme_schedule = config.Configuration.get<bts.md.CMETradingSchedule>();
         _cme_gen_open_hrs = cme_schedule?.gen_open_hour ?? 8.5;
-
-         _adjusted_central_sod = !central_tzi.IsDaylightSavingTime(unadjusted_central_sod) ? unadjusted_central_sod.AddHours(1) : unadjusted_central_sod;
-
-         // Note that this isn't the acutal start of the trading day
-         // but it's close enough for pnl purposes.
-         // In reality, instruments have different schedules
-
-         // if now is less than the current sod, then we me move the sod back a day to account for the trading day start
-         if (_adjusted_central_sod >= TimeZoneInfo.ConvertTime(DateTime.Now, central_tzi)) {
-            _adjusted_central_sod = _adjusted_central_sod.AddDays(-1);
-         }
-         var local_time_zone_sod = TimeZoneInfo.ConvertTime(_adjusted_central_sod, central_tzi, TimeZoneInfo.Local);
-         _start_of_trading_day_utc = local_time_zone_sod.ToUniversalTime();
      }
      // for object initializers
      public MarketSchedule() { }
@@ -73,6 +52,27 @@ namespace mbts.spark {
         return last_open;
      }

+      // DateTime? used here b/c we can't set a default parameter with DateTime.Now
+      // since it's not a compile-time constant
+      public static DateTime get_start_of_trading_day(DateTime? target_datetime = null, DateTimeKind dtk = DateTimeKind.Local ) {
+         if (target_datetime == null) target_datetime = DateTime.Now;
+         var dst_adjusted_central_sod = new DateTimeOffset(
+            new DateTime(target_datetime.Value.Date.Add(new TimeSpan(sod_hh, sod_mm, 0)).Ticks, DateTimeKind.Unspecified),
+            central_tzi.BaseUtcOffset
+         );
+
+         // if we're not currently past the start of the trading day, then the start must be yesterday
+         var temp = dst_adjusted_central_sod;
+         if (temp >= TimeZoneInfo.ConvertTime(target_datetime.Value, central_tzi)) {
+            temp = dst_adjusted_central_sod.AddDays(-1);
+         }
+         var local_time_zone_sod = TimeZoneInfo.ConvertTime(temp.DateTime, central_tzi, TimeZoneInfo.Local);
+         if (dtk == DateTimeKind.Utc) {
+            return local_time_zone_sod.ToUniversalTime();
+         } 
+         return local_time_zone_sod;
+      }
+
      public static DateTime get_utctimestamp_as_localtime(string s) {
         return DateTimeOffset.ParseExact(s, "yyyyMMddHHmmssffffff", null, System.Globalization.DateTimeStyles.AssumeUniversal).ToLocalTime().LocalDateTime;
      }
@@ -15,7 +15,7 @@ namespace mbts.spark {
   class PnLSummaryRow : ViewModelBase, IEquatable<PnLSummaryRow>, DIYGrid.IRowVM {
      static readonly SignedDataStore<Brush> _brushes;
      readonly PnLDoubleBrushCell _start_pnl, _day_pnl, _total_pnl;
-      readonly PnLPriceCell _pnl_price, _weighted_average_buy, _weighted_average_sell;
+      readonly CellProperty<double> _pnl_price, _weighted_average_buy, _weighted_average_sell;
      (string account, Venue? exchange, string symbol, SecurityImmutable? security, SecurityMD? sec_md, SecurityType? sec_type) key;
      IEnumerable<FillImmutable> _fills;
      double _driver;
@@ -38,9 +38,9 @@ namespace mbts.spark {
         day_short_quantity = day_sell_quant;
         total_net_position = net_pos;
         start_net_position = sod_pos;
-         _pnl_price = new PnLPriceCell(this, nameof(pnl_price));
-         _weighted_average_buy = new PnLPriceCell(this, nameof(weighted_average_buy), wavg_buy);
-         _weighted_average_sell = new PnLPriceCell(this, nameof(weighted_average_sell), wavg_sell);
+         _pnl_price = new CellProperty<double>(this, nameof(pnl_price), price => this.security.spec_or_default().format(price), 0);
+         _weighted_average_buy = new CellProperty<double>(this, nameof(weighted_average_buy), price => this.security.spec_or_default().format(price), wavg_buy);
+         _weighted_average_sell = new CellProperty<double>(this, nameof(weighted_average_sell), price => this.security.spec_or_default().format(price), wavg_sell);
         _fills = fills;

         // set the initial pnl and pnl_price when there has been a
@@ -193,19 +193,13 @@ namespace mbts.spark {
      class PnLDoubleBrushCell : CellProperty<double> {
         Brush _background;

-         public PnLDoubleBrushCell(PnLSummaryRow owner, string prop) : base(d => double.IsNaN(d) ? string.Empty : d.ToString("N2"), double.NaN) =>
+         public PnLDoubleBrushCell(PnLSummaryRow owner, string prop) : base(owner, prop, d => double.IsNaN(d) ? string.Empty : d.ToString("N2"), double.NaN) =>
            _value_set += _ => {
               _background = null;
-               owner.RaisePropertyChanged(prop);
            };

         public Brush background => _background ?? (_background = _brushes.get(value));
      }

-      class PnLPriceCell : CellProperty<double> {
-         public PnLPriceCell(PnLSummaryRow owner, string prop, double init = 0)
-            : base(price => owner.security.spec_or_default().format(price), init) =>
-            _value_set += _ => owner.RaisePropertyChanged(prop);
-      }
   }
 }
@@ -25,7 +25,6 @@ namespace mbts.spark.utilities {
      static readonly OrderMetadata _default_order_metadata = new OrderMetadata { KeyBinding = "", Color = BTSColors.Orders.spreader_order };
      static readonly CustomOrderDefinition.CustomOneofCase[]
            // The following standard types are not yet ready for production use:
-            // CustomOrderDefinition.CustomOneofCase.Tick,
            // CustomOrderDefinition.CustomOneofCase.Dynamic,
            _standard_types = new[] {
               CustomOrderDefinition.CustomOneofCase.Market,
@@ -37,6 +36,7 @@ namespace mbts.spark.utilities {
               CustomOrderDefinition.CustomOneofCase.Lean,
               CustomOrderDefinition.CustomOneofCase.Join,
               CustomOrderDefinition.CustomOneofCase.Cover,
+               CustomOrderDefinition.CustomOneofCase.Oco,
               CustomOrderDefinition.CustomOneofCase.Offset,
               CustomOrderDefinition.CustomOneofCase.Top,
               CustomOrderDefinition.CustomOneofCase.Trigger,
@@ -165,7 +165,8 @@ namespace mbts.spark.utilities {
      }
      #endregion

-      public OrderDefinition order(SecurityImmutable security) => order(security, _admin_model.get_default_account());
+      public OrderDefinitionImmutable order(SecurityImmutable security) =>
+         new OrderDefinitionImmutable(order(security, _admin_model.get_default_account()));
      public OrderDefinition order(SecurityImmutable security, AccountTuple? account) {
         var rv = new OrderDefinition {
            SecurityKey = security.Id,
@@ -227,6 +228,15 @@ namespace mbts.spark.utilities {
         Child = custom_order(),
         Hedge = custom_order(),
      };
+      public OCOOrderDefinition oco_order() => new OCOOrderDefinition
+      {
+         Child = custom_order(),
+         Other = custom_order(),
+      };
+      public PricerOrderDefinition pricer_order() => new PricerOrderDefinition
+      {
+         Child = custom_order(),         
+      };
      public OffsetOrderDefinition offset_order() => new OffsetOrderDefinition
      {
         Child = custom_order(),
@@ -261,6 +271,8 @@ namespace mbts.spark.utilities {
            case CustomOrderDefinition.CustomOneofCase.Join: rv.Join = join_order(); break;
            case CustomOrderDefinition.CustomOneofCase.Top: rv.Top = top_order(); break;
            case CustomOrderDefinition.CustomOneofCase.Cover: rv.Cover = cover_order(); break;
+            case CustomOrderDefinition.CustomOneofCase.Oco: rv.Oco = oco_order(); break;
+            case CustomOrderDefinition.CustomOneofCase.Pricer: rv.Pricer = pricer_order(); break;
            case CustomOrderDefinition.CustomOneofCase.Offset: rv.Offset = offset_order(); break;
            case CustomOrderDefinition.CustomOneofCase.Trigger: rv.Trigger = trigger_order(); break;
            case CustomOrderDefinition.CustomOneofCase.Spreader: rv.Spreader = spreader_order(); break;
@@ -284,6 +296,8 @@ namespace mbts.spark.utilities {
            case CustomOrderDefinition.CustomOneofCase.Join: return new OrderMetadata { KeyBinding = "J", Color = BTSColors.Orders.join_order };
            case CustomOrderDefinition.CustomOneofCase.Top: return new OrderMetadata { KeyBinding = "D", Color = BTSColors.Orders.top_order };
            case CustomOrderDefinition.CustomOneofCase.Cover: return new OrderMetadata { KeyBinding = "C", Color = BTSColors.Orders.cover_order };
+            case CustomOrderDefinition.CustomOneofCase.Oco: return new OrderMetadata { KeyBinding = "C", Color = BTSColors.Orders.oco_order };
+            case CustomOrderDefinition.CustomOneofCase.Pricer: return new OrderMetadata { KeyBinding = "C", Color = BTSColors.Orders.pricer_order };
            case CustomOrderDefinition.CustomOneofCase.Offset: return new OrderMetadata { KeyBinding = "O", Color = BTSColors.Orders.tick_order };
            case CustomOrderDefinition.CustomOneofCase.Trigger: return new OrderMetadata { KeyBinding = "T", Color = BTSColors.Orders.trigger_order };
            case CustomOrderDefinition.CustomOneofCase.Spreader: goto default;
@@ -305,6 +319,8 @@ namespace mbts.spark.utilities {
            case OrderState.CustomOneofCase.Join: return new OrderMetadata { KeyBinding = "J", Color = BTSColors.Orders.join_order };
            case OrderState.CustomOneofCase.Top: return new OrderMetadata { KeyBinding = "D", Color = BTSColors.Orders.top_order };
            case OrderState.CustomOneofCase.Cover: return new OrderMetadata { KeyBinding = "C", Color = BTSColors.Orders.cover_order };
+            case OrderState.CustomOneofCase.Oco: return new OrderMetadata { KeyBinding = "C", Color = BTSColors.Orders.oco_order };
+            case OrderState.CustomOneofCase.Pricer: return new OrderMetadata { KeyBinding = "C", Color = BTSColors.Orders.pricer_order };
            case OrderState.CustomOneofCase.Offset: return new OrderMetadata { KeyBinding = "O", Color = BTSColors.Orders.tick_order };
            case OrderState.CustomOneofCase.Trigger: return new OrderMetadata { KeyBinding = "T", Color = BTSColors.Orders.trigger_order };
            case OrderState.CustomOneofCase.Spreader: goto default;
@@ -344,6 +360,8 @@ namespace mbts.spark.utilities {
            case nameof(JoinOrderDefinition): return CustomOrderDefinition.CustomOneofCase.Join;
            case nameof(TopOrderDefinition): return CustomOrderDefinition.CustomOneofCase.Top;
            case nameof(CoverOrderDefinition): return CustomOrderDefinition.CustomOneofCase.Cover;
+            case nameof(OCOOrderDefinition): return CustomOrderDefinition.CustomOneofCase.Oco;
+            case nameof(PricerOrderDefinition): return CustomOrderDefinition.CustomOneofCase.Pricer;
            case nameof(OffsetOrderDefinition): return CustomOrderDefinition.CustomOneofCase.Offset;
            case nameof(TriggerOrderDefinition): return CustomOrderDefinition.CustomOneofCase.Trigger;
            case nameof(DynamicOrderDefinition): return CustomOrderDefinition.CustomOneofCase.Dynamic;
@@ -17,7 +17,9 @@ namespace mbts.spark {
      readonly DelegateProperty<IEnumerable<DialogSkirtItem>> _left_skirt_items;
      readonly List<IDisposable> _resources = new List<IDisposable>(2); // initialize with 2 capacity bc the only potential disposables are the instance/default vms

-      public WindowSettingsDialogVM(IWindowSettingsManager<T> settings_manager, Func<UserSettings, T> get_factory_settings, string settings_file_ext, Func<T, TVM> vm_factory) {
+      public WindowSettingsDialogVM(IWindowSettingsManager<T> settings_manager, Func<UserSettings, T> get_factory_settings, string settings_file_ext, Func<T, TVM> vm_factory, Func<T, T> merge_with_current = null) {
+         if (merge_with_current == null)
+            merge_with_current = s => s;
         // by default, each new window will use their own instance settings
         _use_default = backing(nameof(use_default), settings_manager.instance_settings == null);
         default_vm = vm_factory(settings_manager.default_settings);
@@ -59,15 +61,14 @@ namespace mbts.spark {
            _resources.Add(dispose_dvm);
         // local methods
         void apply() {
+            var result = merge_with_current(instance_vm.get_result());
            if (!use_default) {
-               settings_manager.instance_settings = instance_vm.get_result();
+               settings_manager.instance_settings = result;
            } else {
               settings_manager.instance_settings = null;
-
               // copy the current instance settings and persist
-               var my_default = instance_vm.get_result();
-               if (!my_default.safe_equals(settings_manager.default_settings))
-                  settings_manager.save_default_settings(my_default).ignore();
+               if (!result.safe_equals(settings_manager.default_settings))
+                  settings_manager.save_default_settings(result).ignore();
            }
         }

@@ -13,14 +13,9 @@ namespace mbts.co2
   {
      internal static unsafe T deserialize<T>(byte* buffer, ulong length) where T : new() {
         var stream = new System.IO.UnmanagedMemoryStream(buffer, (long)length);
-         if (typeof(IMessage).IsAssignableFrom(typeof(T))) {
-            IMessage result = (IMessage)new T();
-            result.MergeFrom(stream);
-            return (T)result;
-         }
-         else {
-            return ProtoBuf.Serializer.Deserialize<T>(stream);
-         }
+         IMessage result = (IMessage)new T();
+         result.MergeFrom(stream);
+         return (T)result;
      }

      [DllImport("libspark")]
@@ -81,7 +76,7 @@ namespace mbts.co2
      [DllImport("libspark")]
      internal unsafe static extern IntPtr add_relay_symbol(IntPtr relay, UserSymbol symbol, bts.co2.MDRequest.Types.Flags flags);
      [DllImport("libspark")]
-      internal unsafe static extern IntPtr set_relay_token(IntPtr relay, string user_name);
+      internal unsafe static extern IntPtr set_relay_token(IntPtr relay, byte[] token, long token_size);

      [DllImport("libspark")]
      internal unsafe static extern void post_on_scan_security_thread(Action callback);
@@ -14,17 +14,16 @@ namespace mbts.co2
   {
      MDConsumer _consumer;
      IntPtr _relay;
-      public Co2RelayControl(MDConsumer consumer) {
+      public Co2RelayControl(MDConsumer consumer, uint naggle_ms) {
         _consumer = consumer;
         Log.assert(consumer.native_pointer() != IntPtr.Zero);
-         _relay = 
-            Co2NativeMethods.start_private_relay(consumer.native_pointer(),
-               config.Configuration.get<bts.md.RelayOptions>().naggle_ms);
+         _relay = Co2NativeMethods.start_private_relay(consumer.native_pointer(), naggle_ms);
         Log.assert(_relay != IntPtr.Zero);
      }

-      public void set_token(AuthToken token) {
-         Co2NativeMethods.set_relay_token(_relay, token.Token);
+      public void set_token(AuthTokenImmutable token) {
+         var buffer = token.Token.ToByteArray();
+         Co2NativeMethods.set_relay_token(_relay, buffer, buffer.LongLength);
      }

      public async Task preload_securities(MDRequest.Types.Flags flags=MDRequest.Types.Flags.Security) {
@@ -9,6 +9,7 @@ using System.Runtime.InteropServices;
 using System.Text;
 using System.Threading.Tasks;
 using security_key = System.UInt32;
+using bts;

 namespace mbts.co2
 {
@@ -64,7 +64,7 @@ namespace bts.api.core {
      internal static extern void api_client_send(IntPtr nchannel, byte[] buffer, int length, raw_pb_callback p, IntPtr extra);

      [DllImport("libspark")]
-      internal static extern IntPtr api_client_subscribe(IntPtr client, string method_and_qualifier, raw_subscription_callback cb, IntPtr extra);
+      internal static extern IntPtr api_client_subscribe(IntPtr client, string method, string qualifier, raw_subscription_callback cb, IntPtr extra);
      [DllImport("libspark")]
      internal static extern void api_client_unsubscribe(IntPtr client, IntPtr subscription);

@@ -96,7 +96,7 @@ namespace bts.api.core {
      }

      [DllImport("libspark")]
-      internal static extern IntPtr api_server_create_table(IntPtr server, string method_and_qualifier);
+      internal static extern IntPtr api_server_create_table(IntPtr server, string method, string qualifier);
      [DllImport("libspark")]
      internal static extern void api_server_update_table(IntPtr table, [In] StreamUpdate[] changes, long change_count);
      [DllImport("libspark")]
@@ -17,15 +17,6 @@ namespace bts.api.core

   internal abstract class ApiServer : IApiServer
   {
-      static JsonFormatter _formatter = new JsonFormatter(new JsonFormatter.Settings(true));
-      static Regex _fmt_cleanup = new Regex(@"[\s_+]", RegexOptions.Compiled | RegexOptions.Multiline);
-      public static string format_qualifier<T>(string method, T arg) where T : IMessage {
-         if (arg != null) {
-            string arg_fmt = _fmt_cleanup.Replace(_formatter.Format(arg), "");
-            return method + arg_fmt;
-         }
-         return method;
-      }
      public abstract void dispatch(RequestHeader header, Stream request, Action<byte[]> on_response);

      protected void respond<T>(int request_id, Task<T> task, Action<byte[]> on_response) where T : IMessage, IImmutableMessage {
@@ -1,68 +1,68 @@
-using Google.Protobuf;
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.IO;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace bts.api {
-   internal static class ApiUtils {
-
-
-      public static byte[] serialize<T>(this RequestHeader header, T body) where T : IImmutableMessage {
-         int body_size = body?.CalculateSize() ?? 0;
-         int header_size = header.CalculateSize() + 1; // 1 byte header length
-         var buffer = new byte[header_size+body_size];
+using bts.api.core;
+using Google.Protobuf;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace bts.api {
+   internal static class ApiUtils {
+
+      public static byte[] serialize<T>(this RequestHeader header, T body) where T : IImmutableMessage {
+         int body_size = body?.CalculateSize() ?? 0;
+         int header_size = header.CalculateSize() + 1; // 1 byte header length
+         var buffer = new byte[header_size + body_size];
         using (var stream = new MemoryStream(buffer)) {
            checked { stream.WriteByte((byte)header_size); }
            header.WriteTo(stream);
            if (body != null) body.WriteTo(stream);
-         }
-
-         return buffer;
-      }
-
-      public struct DeserializeResult<THeader,TBody> {
-         public THeader header;
-         public TBody body;
-      }
-
-      private static DeserializeResult<THeader, TBody> mkresult<THeader,TBody>(THeader header, TBody body) {
-         return new DeserializeResult<THeader, TBody>() { header = header, body = body }; }
-
-      public static unsafe DeserializeResult<THeader, TBody> deserialize<THeader,TBody>(byte* buffer, long buffer_length) where THeader : IMessage,new() where TBody : class,IMessage,new() {
-         var header_size = buffer[0];
-         Debug.Assert(header_size <= buffer_length);
-         THeader header = new THeader();
-         header.MergeFrom(new UnmanagedMemoryStream(buffer+1, header_size - 1));
-         TBody body = new TBody();
-         if (buffer_length > header_size) {
-            body.MergeFrom(new UnmanagedMemoryStream(buffer + header_size, buffer_length - header_size));
-         }
-         return mkresult(header, body);
-      }
-
-      public static byte[] serialize<T>(this ResponseHeader header, T body) where T : IImmutableMessage {
-         int header_size = 1 + header.CalculateSize();
-         int body_size = body == null ? 0 : body.CalculateSize();
+         }
+
+         return buffer;
+      }
+
+      public struct DeserializeResult<THeader, TBody> {
+         public THeader header;
+         public TBody body;
+      }
+
+      private static DeserializeResult<THeader, TBody> mkresult<THeader, TBody>(THeader header, TBody body) {
+         return new DeserializeResult<THeader, TBody>() { header = header, body = body }; }
+
+      public static unsafe DeserializeResult<THeader, TBody> deserialize<THeader, TBody>(byte* buffer, long buffer_length) where THeader : IMessage, new() where TBody : class, IMessage, new() {
+         var header_size = buffer[0];
+         Debug.Assert(header_size <= buffer_length);
+         THeader header = new THeader();
+         header.MergeFrom(new UnmanagedMemoryStream(buffer + 1, header_size - 1));
+         TBody body = new TBody();
+         if (buffer_length > header_size) {
+            body.MergeFrom(new UnmanagedMemoryStream(buffer + header_size, buffer_length - header_size));
+         }
+         return mkresult(header, body);
+      }
+
+      public static byte[] serialize<T>(this ResponseHeader header, T body) where T : IImmutableMessage {
+         int header_size = 1 + header.CalculateSize();
+         int body_size = body == null ? 0 : body.CalculateSize();
         var buffer = new byte[header_size + body_size];
-         using (var stream = new MemoryStream(buffer)) {
-            checked { stream.WriteByte((byte)header_size); }
-            header.WriteTo(stream);
-            if (body != null) body.WriteTo(stream);
+         using (var stream = new MemoryStream(buffer)) {
+            checked { stream.WriteByte((byte)header_size); }
+            header.WriteTo(stream);
+            if (body != null) body.WriteTo(stream);
         }
         return buffer;
-      }
-      public static byte[] serialize(this ResponseHeader header) {
-         int header_size = 1 + header.CalculateSize();
-         var buffer = new byte[header_size];
-         using (var stream = new MemoryStream(buffer)) {
-            checked { stream.WriteByte((byte)header_size); }
-            header.WriteTo(stream);
-         }
-         return buffer;
-      }
-   }
-}
+      }
+      public static byte[] serialize(this ResponseHeader header) {
+         int header_size = 1 + header.CalculateSize();
+         var buffer = new byte[header_size];
+         using (var stream = new MemoryStream(buffer)) {
+            checked { stream.WriteByte((byte)header_size); }
+            header.WriteTo(stream);
+         }
+         return buffer;
+      }
+   }
+}
@@ -35,6 +35,7 @@ namespace bts.api.core {
         var header = new RequestHeader() {
            Method = method_id,
            RequestId = id,
+            Token = _context.token.HasValue ? new AuthToken() { Token = _context.token?.Token } : null
         };
         var buffer = header.serialize(request);
         var tcs = new TaskCompletionSource<Result<Response>>();
@@ -56,60 +57,99 @@ namespace bts.api.core {
         return tcs.Task;
      }

-      public unsafe override IObservable<RawUpdate<TOut>> subscribe<TParse,TOut>(string method_and_qualifier, MessageParser<TParse> parser, Func<TParse,TOut> converter) {
-         var result = Observable.Create<RawUpdate<TOut>>(observer => {
-            bool first_update = true;
-            // Memory optimization. There is only one update per subscription.
-            RawUpdate<TOut> the_update = new RawUpdate<TOut>();
-            ApiNativeMethods.raw_subscription_callback cb = (event_type, changes, change_count, unused) => {
-               the_update.Clear();
-               try {
-                  if (event_type == ApiNativeMethods.EventType.TABLE_UPDATED) {
-                     foreach (var change in changes) {
-                        switch (change.type) {
-                           case ApiNativeMethods.ChangeType.REMOVE:
-                              the_update.removed_keys.Add(change.key);
-                              break;
-                           case ApiNativeMethods.ChangeType.REPLACE:
-                              the_update.changed_items.Add(converter(parser.ParseFrom(new UnmanagedMemoryStream(change.buffer, change.buffer_len))));
-                              the_update.changed_keys.Add(change.key);
-                              break;
-                           case ApiNativeMethods.ChangeType.CREATE:
-                              the_update.added_items.Add(converter(parser.ParseFrom(new UnmanagedMemoryStream(change.buffer, change.buffer_len))));
-                              the_update.added_keys.Add(change.key);
-                              break;
-                        }
-                     }
-                     observer.OnNext(the_update);
+      public override IObservable<RawUpdate<TOut>> subscribe<TParse,TOut>(int method_id, string method, string qualifier, MessageParser<TParse> parser, Func<TParse,TOut> converter) {
+         var result = Observable.Create<RawUpdate<TOut>>(async observer => {
+            IntPtr temp_subscription = IntPtr.Zero;
+            void unsubscribe_temp_sub() {
+               // Unsubscribe late to keep qb refcount > 0 continuously
+               if (temp_subscription != IntPtr.Zero) ApiNativeMethods.api_client_unsubscribe(_client, temp_subscription);
+            }
+            while (true) {
+               var response = await check_stream_access(method_id, qualifier);
+               if (response.success) {
+                  if (response.value.Authorized) {
+                     // success. Break loop and subscribe
+                     break;
                  }
-                  else if (event_type == ApiNativeMethods.EventType.TABLE_CREATED) {
-                     if (!first_update) {
-                        observer.OnNext(the_update.MarkAsReset());
-                     }
-                     first_update = false;
+                  else {
+                     // Not authorized. return empty stream
+                     unsubscribe_temp_sub();
+                     observer.OnCompleted();
+                     return System.Reactive.Disposables.Disposable.Empty;
                  }
               }
-               catch (Exception e) {
-                  ApiNativeMethods.api_client_log_error($"Exception in subscription callback for sub: '{method_and_qualifier}' \n--\n '{e}'");
-                  // Sleep to let the log message get asyncronously written to disk
-                  Thread.Sleep(100);
-                  Environment.Exit(-1);
+               else {
+                  // Wait for stream to fire once before trying again
+                  unsubscribe_temp_sub();
+                  var tcs = new TaskCompletionSource<bool>();
+                  ApiNativeMethods.raw_subscription_callback cb = (event_type, changes, change_count, unused) => {
+                     tcs.TrySetResult(true);
+                  };
+                  temp_subscription = ApiNativeMethods.api_client_subscribe(_client, method, qualifier, cb, IntPtr.Zero);
+                  await tcs.Task;
+                  GC.KeepAlive(cb);
               }
-            };
-            var subscription = ApiNativeMethods.api_client_subscribe(_client, method_and_qualifier, cb, IntPtr.Zero);
-            return FinalizeableAnonymousDisposable.Create((disposing) => {
-               ApiNativeMethods.api_client_unsubscribe(_client, subscription);
-               subscription = IntPtr.Zero;
-               GC.KeepAlive(cb);
-               cb = null;
-               // Cannot (ever) call logging from the finalizer thread
-               // if (!disposing) {
-               //    ApiNativeMethods.api_client_log_error($"Subscription has been terminated because the returned IDisposable has been finalized. Subscription: {method_and_qualifier}");
-               // }
-            });
+            }
+
+            // Authorized. Stream events
+            unsubscribe_temp_sub();
+            return SubscribeNative(method, qualifier, parser, converter, observer);
         });
         return result;
      }
+      private Task<Result<StreamAccessResponse>> check_stream_access(int method_id, string qualifier) {
+         var request = new StreamAccessRequest() { Qualifier = qualifier ?? "" };
+         return send<StreamAccessRequest, StreamAccessResponse>(method_id, request);
+      }
+
+      private unsafe IDisposable SubscribeNative<TParse, TOut>(string method, string qualifier, MessageParser<TParse> parser, Func<TParse, TOut> converter, IObserver<RawUpdate<TOut>> observer) where TParse : IMessage<TParse> {
+         bool first_update = true;
+         // Memory optimization. There is only one update per subscription.
+         RawUpdate<TOut> the_update = new RawUpdate<TOut>();
+         ApiNativeMethods.raw_subscription_callback cb = (event_type, changes, change_count, unused) => {
+            the_update.Clear();
+            try {
+               if (event_type == ApiNativeMethods.EventType.TABLE_UPDATED) {
+                  foreach (var change in changes) {
+                     switch (change.type) {
+                        case ApiNativeMethods.ChangeType.REMOVE:
+                           the_update.removed_keys.Add(change.key);
+                           break;
+                        case ApiNativeMethods.ChangeType.REPLACE:
+                           the_update.changed_items.Add(converter(parser.ParseFrom(new UnmanagedMemoryStream(change.buffer, change.buffer_len))));
+                           the_update.changed_keys.Add(change.key);
+                           break;
+                        case ApiNativeMethods.ChangeType.CREATE:
+                           the_update.added_items.Add(converter(parser.ParseFrom(new UnmanagedMemoryStream(change.buffer, change.buffer_len))));
+                           the_update.added_keys.Add(change.key);
+                           break;
+                     }
+                  }
+                  observer.OnNext(the_update);
+               }
+               else if (event_type == ApiNativeMethods.EventType.TABLE_CREATED) {
+                  if (!first_update) {
+                     observer.OnNext(the_update.MarkAsReset());
+                  }
+                  first_update = false;
+               }
+            }
+            catch (Exception e) {
+               ApiNativeMethods.api_client_log_error($"Exception in subscription callback for sub: '{method}/{qualifier}' \n--\n '{e}'");
+               // Sleep to let the log message get asyncronously written to disk
+               Thread.Sleep(100);
+               Environment.Exit(-1);
+            }
+         };
+         var subscription = ApiNativeMethods.api_client_subscribe(_client, method, qualifier, cb, IntPtr.Zero);
+         return FinalizeableAnonymousDisposable.Create((disposing) => {
+            ApiNativeMethods.api_client_unsubscribe(_client, subscription);
+            subscription = IntPtr.Zero;
+            GC.KeepAlive(cb);
+            cb = null;
+         });
+      }
+
      private class FinalizeableAnonymousDisposable : IDisposable {
         private Action<bool> _action;
         public FinalizeableAnonymousDisposable(Action<bool> dispose) {
@@ -5,7 +5,7 @@ using System.Threading.Tasks;
 namespace bts.api.core {
   internal abstract class ClientChannel : IDisposable
   {
-      readonly ServiceContext _context;
+      protected readonly ServiceContext _context;

      public ClientChannel(ServiceContext context) {
         _context = context;
@@ -13,7 +13,7 @@ namespace bts.api.core {
      public abstract void Dispose();
      public abstract Task<Result<Response>> send<Request, Response>(int method_id, Request request)
         where Request: IImmutableMessage where Response : class,IMessage,new();
-      public abstract IObservable<RawUpdate<TOut>> subscribe<TParse,TOut>(string method_and_qualifier, MessageParser<TParse> parser, Func<TParse,TOut> converter=null) 
+      public abstract IObservable<RawUpdate<TOut>> subscribe<TParse,TOut>(int method_id, string method, string qualifier, MessageParser<TParse> parser, Func<TParse,TOut> converter=null) 
         where TParse : IMessage<TParse>;

      public abstract bool is_sync_call_ok();
@@ -37,7 +37,12 @@ namespace bts.api.core
      public T value {
         get {
            if (success) return _result;
-            else throw new ApiException(error_message);
+            else {
+               if (typeof(T).IsValueType) { throw new ApiException(error_message); }
+               else {
+                  return default(T);// always null
+               }
+            }
         }
      }
      public bool success { get { return _code == ApiError.Success; } }
@@ -34,8 +34,8 @@ namespace bts.api.core {
      }
      public Action<RequestHeader, Stream, Action<byte[]>> on_request;

-      public IntPtr create_table(string method_and_qualifier) {
-         return ApiNativeMethods.api_server_create_table(_server, method_and_qualifier);
+      public IntPtr create_table(string method, string qualifier) {
+         return ApiNativeMethods.api_server_create_table(_server, method, qualifier);
      }

      public void Dispose() {
@@ -4,12 +4,14 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.Reflection;
+using bts.api.user;

-namespace bts.api.core
-{
+namespace bts.api.core {
   public class ServiceContext : IDisposable
   {
      IntPtr _qbus;
+      AuthToken _token;
+
      public ServiceContext() {
         _qbus = ApiNativeMethods.api_create_quickbus(null, 0);
      }
@@ -22,7 +24,6 @@ namespace bts.api.core
         Type[] arg_types = new[] { typeof(ClientChannel) };
         ConstructorInfo ctor = typeof(T).GetConstructors(BindingFlags.NonPublic | BindingFlags.Instance).First(ci => ci.GetParameters().SingleOrDefault()?.ParameterType == typeof(ClientChannel));
         return (T)ctor.Invoke(new object[] { channel });
-         //return (T)Activator.CreateInstance(typeof(T), channel);
      }

      internal ServerChannel publish<T>(T service, string service_type, string qualifier) where T : IApiServer {
@@ -31,6 +32,38 @@ namespace bts.api.core
         return ch;
      }

+      public AuthTokenImmutable? token => _token ?? (AuthTokenImmutable?)null;
+      public string user { get; private set; }
+      public uint user_id { get; private set; }
+      public bool is_authenticated => token.HasValue;
+
+      public async Task<LoginResult> login(string username, string password) {
+         var auth_service = locate<AuthService>();
+         var result = await auth_service.authenticate_login_async(new AuthenticateLoginRequest() {
+            Login = username ?? "",
+            Password = password ?? ""
+         });
+         if (result.success) {
+            if (result.value.IsValid) {
+               _token = result.value.Token;
+               user = username;
+               user_id = result.value.UserId;
+               return new LoginResult();
+            }
+            else {
+               return new LoginResult(result.value.Reason);
+            }
+         }
+         else {
+            return new LoginResult(result.error_message);
+         }
+      }
+      public void login(AuthTokenImmutable token) {
+         this.user = "";
+         this.user_id = 0;
+         this._token = token.CloneToMutable();
+      }
+
      #region IDisposable Support

      protected virtual void Dispose(bool disposing) {
@@ -52,4 +85,11 @@ namespace bts.api.core
      }
      #endregion
   }
+
+   public class LoginResult {
+      public LoginResult() { success = true; }
+      public LoginResult(string reason) { success = false; this.reason = reason; }
+      public bool success { get; }
+      public string reason { get; }
+   }
 }
@@ -1,23 +0,0 @@
-using System;
-using System.Threading.Tasks;
-using bts.api;
-using bts.api.core;
-
-namespace bts.api
-{
-   public class Authenticator
-   {
-      readonly static Lazy<user.UserService> _auth = new Lazy<user.UserService>(() => Locator.locate<user.UserService>(), true);
-      user.AuthToken _token = null;
-      public Authenticator() { }
-
-      public user.AuthToken last_token => _token;
-      public async Task<user.AuthToken> login(string login, string password)
-      {
-         var res = await _auth.Value.authenticate_login_async(new user.AuthenticateLoginRequest { Login = login, Password = password });
-         if (res.success)
-            _token = res.value.Token;            
-         return _token;
-      }
-   }
-}
@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+using bts.api;
+using mbts;
+using mbts.co2;
+
+namespace bts.md
+{
+   interface IMDUpdate
+   {
+      bool update(SecurityMD smd, ref ulong last_update_time);
+   }
+
+   public interface IMDData 
+   {
+      SecurityImmutable security { get; } 
+   } 
+   
+   public interface IMDBook : IMDData
+   {
+      List<PriceSize> bids { get; }
+      List<PriceSize> asks { get; }
+   }
+
+   class MDBook : IMDBook, IMDUpdate
+   {
+      public MDBook()
+      {
+      }
+      public SecurityImmutable security { get; private set; }
+      
+      public List<PriceSize> bids { get; private set; }
+      public List<PriceSize> asks { get; private set; }
+            
+      bool IMDUpdate.update(SecurityMD smd, ref ulong last_update_time)
+      {
+         this.security = smd.security;
+         NativePriceSize[] bids = null, asks = null;
+         if (smd.md.get_depth(ref last_update_time, ref bids, ref asks, NativePriceHelpers.COCONUT_MAX_DEPTH)) 
+         {            
+            this.bids = bids.Select(x => new PriceSize(x.size, x.direct_size, x.implied_size, x.price)).ToList();
+            this.asks = asks.Select(x => new PriceSize(x.size, x.direct_size, x.implied_size, x.price)).ToList();
+            return true;
+         }
+         return false;
+      }
+
+      public override string ToString()
+      {         
+         return security.ToString() + Environment.NewLine + 
+               "Bid BidSz BidISz" + Environment.NewLine + 
+               string.Join("\n", bids.Select(x => x.ToString())) + Environment.NewLine +
+               "Ask AskSz AskISz" + Environment.NewLine +
+               string.Join("\n", asks.Select(x => x.ToString()));
+      }
+   }
+}