1.20

1. Added an input parameter to avoid deleting the Position Sizer's lines when the robot is removed.
2. Fixed a bug with wrong currency shown in additional line labels.
3. Fixed a crash when broker reports in correct lot size value.
4. Fixed a crash when the trading symbol's name contains special characters.
5. Renamed Show Line Labels input parameter to Show Main Line Labels.

Author: aamoraru

PositionSizer/PositionSizer/Model/TradeSize.cs

@@ -19,6 +19,7 @@ public class TradeSize
     public double Volume => Symbol.QuantityToVolumeInUnits(Lots);
     public double RiskPercentage { get; set; }
     public double RiskPercentageResult { get; set; }
+    public double RewardPercentageResult => RiskPercentageResult * RewardRiskRatioResult;
     public double RiskInCurrency { get; set; }
     public double RewardRiskRatio { get; set; }
     public double RiskInCurrencyResult { get; set; }

PositionSizer/PositionSizer/Parameters.cs

@@ -9,8 +9,8 @@ public partial class PositionSizer
     /// <summary>
     /// Show pip distance for TP/SL near lines
     /// </summary>
-    [Parameter("Show Line Labels", DefaultValue = true, Group = "Compactness", Description = "Show pip distance for TP/SL near lines")]
-    public bool InputShowLineLabels { get; set; }
+    [Parameter("Show Main Line Labels", DefaultValue = true, Group = "Compactness", Description = "Show pip distance for TP/SL near lines")]
+    public bool InputShowMainLineLabels { get; set; }
 
     /// <summary>
     /// Show SL $/% label
@@ -490,6 +490,9 @@ public partial class PositionSizer
     [Parameter("Chart Trade Button Offset From The Right", DefaultValue = 50, Group = "Miscellaneous")]
     public int InputTradeButtonOffsetFromTheRight { get; set; }
 
+    [Parameter("Keep Lines When Robot Is Stopped", DefaultValue = false, Group = "Miscellaneous")]
+    public bool InputKeepLinesWhenRobotIsStopped { get; set; }
+    
     #endregion
 
     //[Parameter("Refresh (ms)", DefaultValue = 20)]

PositionSizer/PositionSizer/PositionSizer.cs

@@ -4,7 +4,7 @@
 //   WARNING: No warranty. This EA is offered "as is". Use at your own risk.
 //   Note: Pressing Shift+T will open a trade.
 //   
-//   Version 1.19.
+//   Version 1.20
 //   Copyright 2024-2025, EarnForex.com
 //   https://www.earnforex.com/ctrader-robots/cTrader-Position-Sizer/
 // -------------------------------------------------------------------------------
@@ -15,7 +15,6 @@
 using System.Text;
 using System.Text.RegularExpressions;
 using cAlgo.API;
-using cAlgo.API.Internals;
 using cAlgo.Robots.RiskManagers;
 using cAlgo.Robots.Tools;
 using PositionSizer.XTextBoxControl.ByTypes;
@@ -35,7 +34,7 @@ public partial class PositionSizer : Robot,
     public event EventHandler TimerEvent;
     public event EventHandler StopEvent;
     public IModel Model { get; set; }
-    public const string Version = "v1.19";
+    public const string Version = "v1.20";
     public CustomStyle CustomStyle { get; private set; }
     public BreakEven BreakEven { get; private set; }
     public TrailingStop TrailingStop { get; private set; }
@@ -57,6 +56,13 @@ public partial class PositionSizer : Robot,
 
     protected override void OnStart()
     {
+        if (Symbol.LotSize == 0)
+        {
+            var msgText = "This symbol reports a lot size of zero, which prevents the bot from operating correctly. Please select a symbol with a non-zero lot size or update the symbol's contract size and restart the bot.";
+            MessageBox.Show(msgText, "Warning!", MessageBoxButton.OK, MessageBoxImage.Warning);
+            Stop();
+        }
+        
         //System.Diagnostics.Debugger.Launch();
 
         // IndexForLabelReference = RunningMode == RunningMode.VisualBacktesting
@@ -345,8 +351,12 @@ public static string CleanName(string fileName)
         if (string.IsNullOrWhiteSpace(fileName))
             return string.Empty;
 
-        // Allow only letters (A-Z, a-z) and numbers (0-9)
-        return Regex.Replace(fileName, "[^a-zA-Z0-9]", "").Replace(" ", "");
+        // Allow only Latin letters (A-Z, a-z), numbers (0-9), and spaces
+        // Remove all other characters (like &, @, etc.)
+        var cleaned = Regex.Replace(fileName, "[^a-zA-Z0-9 ]", "").Replace(" ", "");;
+        
+        // Trim leading and trailing spaces (LocalStorage requirement)
+        return cleaned.Trim();
     }
 
     private void SetAtrSettings(bool canImplementModel, IModel storageModel)

PositionSizer/PositionSizer/Presenter.cs

@@ -15,6 +15,7 @@ public partial class PositionSizer
 
     public void StartPresenter()
     {
+        SetupWindowView.ChartLinesView.RemoveLines();
         SetupWindowView.WindowActiveChanged += SetupWindowViewOnWindowActiveChanged;
 
         #region MainViewSubscriptions
@@ -411,7 +412,16 @@ private void SymbolOnTick(SymbolTickEventArgs obj)
 
     private void OnStopEvent(object sender, EventArgs e)
     {
-        SetupWindowView.ChartLinesView.RemoveLines();
+        if (!InputKeepLinesWhenRobotIsStopped)
+            SetupWindowView.ChartLinesView.RemoveLines();
+        else
+        {
+            foreach (var line in SetupWindowView.ChartLinesView.HorizontalLines)
+            {
+                line.IsInteractive = true;
+                line.IsHidden = false;
+            }
+        }
     }
 
     private void SetupWindowViewOnWindowActiveChanged(object sender, WindowActiveChangedEventArgs e)