Add interfaces, add edit position , close position to MG model.

MarketDataLib/Generator/Interface/IPosition.cs

@@ -0,0 +1,13 @@
+using System;
+
+namespace MarketData.Generator.Interface
+{
+  public interface IPosition : IPurePosition
+  {
+    double TrailingStopLimit {get; set;}
+
+    double InitialStopLimit {get; set;}
+
+    double PositionRiskPercentDecimal {get; set;}
+  }
+}