Added PrevClose to Price which should not be persisted in the database.

MarketDataLib/MarketDataModel/Prices.cs

@@ -325,6 +325,7 @@ namespace MarketData.MarketDataModel
     private double close;
     private long volume;
     private double adjClose;
+    private double prevClose;  // !!IMPORTANT we don't store this nor do we consider this when evaluating a valid price.
     private PriceSource source;
     public Price()
     {
@@ -339,6 +340,7 @@ namespace MarketData.MarketDataModel
       this.Close=price.Close;
       this.Volume=price.Volume;
       this.AdjClose=price.AdjClose;
+      this.PrevClose=price.PrevClose;
       this.Source=price.Source;
     }
     public Price Clone()
@@ -352,6 +354,7 @@ namespace MarketData.MarketDataModel
       clonePrice.Close=Close;
       clonePrice.Volume=Volume;
       clonePrice.AdjClose=AdjClose;
+      clonePrice.PrevClose=PrevClose;
       clonePrice.Source=Source;
       return clonePrice;
     }
@@ -418,6 +421,11 @@ namespace MarketData.MarketDataModel
       get { return adjClose; }
       set { adjClose = value; }
     }
+    public double PrevClose
+    {
+      get { return prevClose; }
+      set { prevClose = value; }
+    }
     public bool IsValid
     {
       get