moar Chart indicators

2026-08-19 11:08:05 +00:00 · 2024-11-07 21:40:02 -08:00
parent 2a72b2881b
commit 351214ed31
49 changed files with 697 additions and 42 deletions
@@ -0,0 +1,77 @@
+using System.Drawing;
+using TradingPlatform.BusinessLayer;
+
+namespace QuanTAlib;
+
+public class QemaIndicator : Indicator, IWatchlistIndicator
+{
+    [InputParameter("K1", sortIndex: 1, 0.01, 1, 0.01, 2)]
+    public double K1 { get; set; } = 0.2;
+
+    [InputParameter("K2", sortIndex: 2, 0.01, 1, 0.01, 2)]
+    public double K2 { get; set; } = 0.2;
+
+    [InputParameter("K3", sortIndex: 3, 0.01, 1, 0.01, 2)]
+    public double K3 { get; set; } = 0.2;
+
+    [InputParameter("K4", sortIndex: 4, 0.01, 1, 0.01, 2)]
+    public double K4 { get; set; } = 0.2;
+
+    [InputParameter("Data source", sortIndex: 5, 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;
+
+    [InputParameter("Show cold values", sortIndex: 21)]
+    public bool ShowColdValues { get; set; } = true;
+
+    private Qema? ma;
+    protected LineSeries? Series;
+    protected string? SourceName;
+    public int MinHistoryDepths => (int)((2 - Math.Min(Math.Min(K1, K2), Math.Min(K3, K4))) / Math.Min(Math.Min(K1, K2), Math.Min(K3, K4)));
+    int IWatchlistIndicator.MinHistoryDepths => MinHistoryDepths;
+
+    public override string ShortName => $"QEMA {K1},{K2},{K3},{K4}:{SourceName}";
+
+    public QemaIndicator()
+    {
+        OnBackGround = true;
+        SeparateWindow = false;
+        SourceName = Source.ToString();
+        Name = "QEMA - Quadruple Exponential Moving Average";
+        Description = "Quadruple Exponential Moving Average";
+        Series = new(name: $"QEMA {K1},{K2},{K3},{K4}", color: IndicatorExtensions.Averages, width: 2, style: LineStyle.Solid);
+        AddLineSeries(Series);
+    }
+
+    protected override void OnInit()
+    {
+        ma = new Qema(K1, K2, K3, K4);
+        SourceName = Source.ToString();
+        base.OnInit();
+    }
+
+    protected override void OnUpdate(UpdateArgs args)
+    {
+        TValue input = this.GetInputValue(args, Source);
+        TValue result = ma!.Calc(input);
+
+        Series!.SetValue(result.Value);
+        Series!.SetMarker(0, Color.Transparent); //OnPaintChart draws the line, hidden here
+    }
+
+    public override void OnPaintChart(PaintChartEventArgs args)
+    {
+        base.OnPaintChart(args);
+        this.PaintSmoothCurve(args, Series!, ma!.WarmupPeriod, showColdValues: ShowColdValues, tension: 0.2);
+    }
+}