diff --git a/src/DataStreamSuite/SharedStreams/Business/MarketData/MDStream.cs b/src/DataStreamSuite/SharedStreams/Business/MarketData/MDStream.cs
index 643146112..e334c3aba 100644
--- a/src/DataStreamSuite/SharedStreams/Business/MarketData/MDStream.cs
+++ b/src/DataStreamSuite/SharedStreams/Business/MarketData/MDStream.cs
@@ -1,7 +1,9 @@
 namespace BCG {
    using BCG.Utilities.General;
 
+   using bts;
    using bts.api;
+   using bts.api.core;
    using bts.api.domain;
    using bts.api.synthetic;
    using bts.md;
@@ -14,6 +16,7 @@ namespace BCG {
    using mbts.spark;
    using mbts.ui;
 
+   using Spark.Api.MarketData;
    using Spark.Core.Data;
    using Spark.Core.Disposables;
    using Spark.Core.Reactive;
@@ -39,6 +42,8 @@ namespace BCG {
          new ColumnInfo("sec", 1, typeof(string))}, "md");
 
       private BlueTable _rows;
+      readonly MarketDataClient mdClient;
+      IDisposable? mdSub;
 
       public MDStream()
       : this(String.Empty, ViewStreamDatabase.instance) {
@@ -49,14 +54,27 @@ namespace BCG {
          _symbol = symbol;
          _rows = new BlueTable(_schema);
          _md_source = new MDSource(TimeSpan.FromSeconds(0.5));
+         mdClient = new(_md_source);
       }
 
       protected override void myOnFirstSubscriber() {
          _vsd.addWorker(this);
          _md_source.subscribe_securities().Subscribe(c => on_md(c));
+         Log.isnull(mdSub);
+         mdSub = mdClient.books().Subscribe(onBooks);
          //base.myOnFirstSubscriber();
       }
 
+      void onBooks(TableUpdate<BookTuple, uint> update) {
+         foreach (var book in update.added) {
+            bts.Log.Gen.info($"MDStream.on_md sec: {book.security}");
+            var sec = book.security;
+            IBlueRow r = new BlueRow(_schema, _id++, sec.ToString());
+            _rows.addRow(r);
+            _is_dirty = true;
+         }
+      }
+
       protected override void myOnLastSubscriber() {
          //base.myOnLastSubscriber();
          _vsd.removeWorker(this);
@@ -82,4 +100,4 @@ namespace BCG {
          }
       }
    }
-}
\ No newline at end of file
+}