Add error handling for GMX positions

src/Managing.Application/Trading/Commands/OpenPositionRequest.cs

@@ -32,7 +32,7 @@ namespace Managing.Application.Trading.Commands
 
             if (amountToTrade <= Constants.GMX.Config.MinimumPositionAmount)
             {
-                throw new ArgumentException("Bot trading balance must be greater than zero", nameof(amountToTrade));
+                throw new ArgumentException("Bot trading balance must be greater than : 5usdc", nameof(amountToTrade));
             }
 
             AmountToTrade = amountToTrade;