Atr, FlowIndicator and fixes

quantower/Volatility/AtrIndicator.cs

@@ -8,9 +8,12 @@ public class AtrIndicator : Indicator, IWatchlistIndicator
     [InputParameter("Periods", sortIndex: 1, 1, 2000, 1, 0)]
     public int Periods { get; set; } = 20;
 
+    [InputParameter("Show cold values", sortIndex: 21)]
+    public bool ShowColdValues { get; set; } = true;
+
     private Atr? atr;
     protected LineSeries? AtrSeries;
-    public static int MinHistoryDepths => 2;
+    public int MinHistoryDepths => Math.Max(5, Periods * 2);
     int IWatchlistIndicator.MinHistoryDepths => MinHistoryDepths;
 
     public AtrIndicator()
@@ -19,7 +22,7 @@ public class AtrIndicator : Indicator, IWatchlistIndicator
         Description = "Measures market volatility by calculating the average range between high and low prices.";
         SeparateWindow = true;
 
-        AtrSeries = new("ATR", Color.Blue, 2, LineStyle.Solid);
+        AtrSeries = new($"ATR {Periods}", Color.Blue, 2, LineStyle.Solid);
         AddLineSeries(AtrSeries);
     }
 
@@ -35,7 +38,16 @@ public class AtrIndicator : Indicator, IWatchlistIndicator
         TValue result = atr!.Calc(input);
 
         AtrSeries!.SetValue(result.Value);
+        AtrSeries!.SetMarker(0, Color.Transparent); //OnPaintChart draws the line, hidden here
+
     }
 
     public override string ShortName => $"ATR ({Periods})";
+
+    public override void OnPaintChart(PaintChartEventArgs args)
+    {
+        base.OnPaintChart(args);
+        this.PaintHLine(args, 0.05, new Pen(Color.DarkRed, width: 2));
+        this.PaintSmoothCurve(args, AtrSeries!, atr!.WarmupPeriod, showColdValues: ShowColdValues, tension: 0.2);
+    }
 }