Fix potential issue when selecting the fallback candidate and share count is zero.

MarketDataLib/Generator/Momentum/Backtest.cs

@@ -393,12 +393,13 @@ namespace MarketData.Generator.Momentum
           Positions positions = null;
           positions=BuyPositions(TradeDate,AnalysisDate,CashBalance/((double)HoldingPeriod-(double)ActivePositions.Count),SymbolsHeld(TradeDate));
           MDTrace.WriteLine(LogLevel.DEBUG, "******************** B U Y ********************");
-          positions.Display();
           if(CashBalance-positions.Exposure<0.00)
           {
+            positions.Clear();
             MDTrace.WriteLine(LogLevel.DEBUG,String.Format("********** Insufficient funds to make additional purchases.**************"));
-            break;
+//            break;
           }
+          positions.Display();
           ActivePositions.Add(slotIndex,positions);
           CashBalance-=positions.Exposure;
           DisplayBalance();
@@ -590,6 +591,7 @@ namespace MarketData.Generator.Momentum
         position.PurchasePrice = price.Close;
         position.CurrentPrice = price.Close;
         position.Shares = (int)Math.Floor(cash / position.PurchasePrice);
+        if(0 == position.Shares)return positions;
         positions.Add(position);
       }
       return positions;