refresh with new QT DLL

quantower/Statistics/SlopeIndicator.cs

@@ -1,25 +1,82 @@
+using System.Drawing;
 using TradingPlatform.BusinessLayer;
+
 namespace QuanTAlib;
 
-public class SlopeIndicator : IndicatorBase
+public class SlopeIndicator : Indicator, IWatchlistIndicator
 {
-    [InputParameter("Period", sortIndex: 1, 2, 2000, 1, 0)]
-    public int Period { get; set; } = 20;
+    [InputParameter("Periods", sortIndex: 1, 2, 1000, 1, 0)]
+    public int Periods { get; set; } = 20;
+
+    [InputParameter("Data source", sortIndex: 2, variants: [
+        "Open", SourceType.Open,
+        "High", SourceType.High,
+        "Low", SourceType.Low,
+        "Close", SourceType.Close,
+        "HL/2 (Median)", SourceType.HL2,
+        "OC/2 (Midpoint)", SourceType.OC2,
+        "OHL/3 (Mean)", SourceType.OHL3,
+        "HLC/3 (Typical)", SourceType.HLC3,
+        "OHLC/4 (Average)", SourceType.OHLC4,
+        "HLCC/4 (Weighted)", SourceType.HLCC4
+    ])]
+    public SourceType Source { get; set; } = SourceType.Close;
 
     private Slope? slope;
-    protected override AbstractBase QuanTAlib => slope!;
-    public override string ShortName => $"SLOPE {Period} : {SourceName}";
+    protected LineSeries? SlopeSeries;
+    protected LineSeries? LineSeries;
+    protected string? SourceName;
+    public int MinHistoryDepths => Periods;
+    int IWatchlistIndicator.MinHistoryDepths => MinHistoryDepths;
 
     public SlopeIndicator()
     {
-        Name = "SLOPE - Trend Slope";
-        Description = "Measures the rate of change in price over a specified period, indicating trend strength and direction.";
+        Name = "Slope";
+        Description = "Calculates the slope of a linear regression line for the specified period";
         SeparateWindow = true;
+        SourceName = Source.ToString();
+
+        SlopeSeries = new("Slope", Color.Blue, 2, LineStyle.Solid);
+        LineSeries = new("Regression Line", Color.Red, 1, LineStyle.Solid);
+        AddLineSeries(SlopeSeries);
+        AddLineSeries(LineSeries);
     }
 
-    protected override void InitIndicator()
+    protected override void OnInit()
     {
-        slope = new(Period);
-        MinHistoryDepths = slope.WarmupPeriod;
+        slope = new Slope(Periods);
+        SourceName = Source.ToString();
+        base.OnInit();
+    }
+
+    protected override void OnUpdate(UpdateArgs args)
+    {
+        TValue input = this.GetInputValue(args, Source);
+        TValue result = slope!.Calc(input);
+
+        SlopeSeries!.SetValue(result.Value);
+        if (slope.Line.HasValue)
+        {
+            LineSeries!.SetValue(slope.Line.Value);
+        }
+    }
+
+    public override string ShortName
+    {
+        get
+        {
+            var result = $"Slope ({Periods}:{SourceName})";
+            if (slope != null)
+            {
+                result += $" Slope: {Math.Round(SlopeSeries!.GetValue(), 6)}";
+                if (slope.Line.HasValue)
+                    result += $", Line: {Math.Round(slope.Line.Value, 6)}";
+                if (slope.Intercept.HasValue)
+                    result += $", Intercept: {Math.Round(slope.Intercept.Value, 6)}";
+                if (slope.RSquared.HasValue)
+                    result += $", R²: {Math.Round(slope.RSquared.Value, 6)}";
+            }
+            return result;
+        }
     }
 }