diff --git a/MarketData/MarketDataLib/Cache/GLPriceCache.cs b/MarketData/MarketDataLib/Cache/GLPriceCache.cs
index fa67c83..8026e06 100644
--- a/MarketData/MarketDataLib/Cache/GLPriceCache.cs
+++ b/MarketData/MarketDataLib/Cache/GLPriceCache.cs
@@ -2,14 +2,14 @@ using MarketData.MarketDataModel;
 using MarketData.Utils;
 using MarketData.DataAccess;
 using System.Collections.Concurrent;
-using System.Collections.Generic;
-using System;
-using System.Linq;
-using System.Threading;
-using System.Threading.Tasks;
 
 namespace MarketData.Cache
 {
+    /// <summary>
+    /// GLPriceCache - Used by Gain/Loss Generator which are usedby MarketDataSErver and the User Interface.
+    /// The entire cache evicts every hour so calling Add(PortfolioTrades portfolioTrades) will force price reload
+    /// Always ensures that open trade symbols get most recent price from the database.  
+    /// </summary>
     public class GLPriceCache : IDisposable
     {
         // -- Singleton ------------------------------------------------------------