Initial Commit

MarketData/MarketDataLib/MarketDataModel/SignalHolder.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace MarketData.MarketDataModel
+{
+  public class SignHolder
+  {
+    public enum SignValue { Positive, Negative, Undefined };
+    private double currentValue;
+    private double previousValue;
+
+    public SignHolder()
+    {
+      currentValue = previousValue = 0.00;
+    }
+    public void SetValue(double value)
+    {
+      if (value == 0.00)
+      {
+        previousValue = currentValue;
+        return;
+      }
+      previousValue = currentValue;
+      currentValue = value;
+    }
+    public bool SignChange
+    {
+      get
+      {
+        if (previousValue < 0.00 && currentValue > 0.00) return true;
+        if (previousValue > 0.00 && currentValue < 0.00) return true;
+        return false;
+      }
+    }
+    public double PreviousValue
+    {
+      get { return previousValue; }
+    }
+    public double CurrentValue
+    {
+      get { return currentValue; }
+    }
+    public String GetValueString()
+    {
+      StringBuilder sb = new StringBuilder();
+      sb.Append("[").Append(previousValue).Append("->").Append(currentValue).Append("]");
+      return sb.ToString();
+    }
+  }
+}