diff --git a/Model/CMTPositionModel.cs b/Model/CMTPositionModel.cs
index 4ea17fa..7cd8875 100644
--- a/Model/CMTPositionModel.cs
+++ b/Model/CMTPositionModel.cs
@@ -18,6 +18,7 @@ using Position=MarketData.Generator.CMTrend.Position;
 using StopLimit=MarketData.MarketDataModel.StopLimit;
 
 using MarketData.DataAccess;
+using TradeBlotter.Interface;
 
 namespace TradeBlotter.Model
 {
@@ -37,7 +38,7 @@ namespace TradeBlotter.Model
     }
   }
 
-  public class CMTPositionModel:ModelBase
+  public class CMTPositionModel : ModelBase, IPositionModel
   {
     private Position position=new Position();
     private int priceChangeDirection=0;