Momentum

charts for Quantower

quantower/Volume/ObvIndicator.cs

@@ -0,0 +1,51 @@
+using System.Drawing;
+using TradingPlatform.BusinessLayer;
+
+namespace QuanTAlib;
+
+public class ObvIndicator : Indicator, IWatchlistIndicator
+{
+    [InputParameter("Show cold values", sortIndex: 21)]
+    public bool ShowColdValues { get; set; } = true;
+
+    private Obv? obv;
+    protected LineSeries? ObvSeries;
+    public int MinHistoryDepths => 5;
+    int IWatchlistIndicator.MinHistoryDepths => MinHistoryDepths;
+
+    public ObvIndicator()
+    {
+        Name = "OBV - On-Balance Volume";
+        Description = "Measures buying and selling pressure by analyzing volume in relation to price changes.";
+        SeparateWindow = true;
+
+        ObvSeries = new("OBV", color: IndicatorExtensions.Volume, 2, LineStyle.Solid);
+        AddLineSeries(ObvSeries);
+    }
+
+    protected override void OnInit()
+    {
+        obv = new Obv();
+        base.OnInit();
+    }
+
+    protected override void OnUpdate(UpdateArgs args)
+    {
+        TBar input = IndicatorExtensions.GetInputBar(this, args);
+        TValue result = obv!.Calc(input);
+
+        ObvSeries!.SetValue(result.Value);
+        ObvSeries!.SetMarker(0, Color.Transparent);
+    }
+
+#pragma warning disable CA1416 // Validate platform compatibility
+
+    public override string ShortName => "OBV";
+
+    public override void OnPaintChart(PaintChartEventArgs args)
+    {
+        base.OnPaintChart(args);
+        this.PaintHLine(args, 0, new Pen(color: Color.DimGray, width: 1));
+        this.PaintSmoothCurve(args, ObvSeries!, obv!.WarmupPeriod, showColdValues: ShowColdValues, tension: 0.2);
+    }
+}

quantower/Volume/_Volume.csproj

@@ -27,4 +27,4 @@
     <Copy SourceFiles="$(OutputPath)\Volume.dll" DestinationFolder="$(QuantowerRoot)\Settings\Scripts\Indicators\QuanTAlib\Volume" />
   </Target>
 
-</Project>
+</Project>