volatility indicators

lib/volatility/hv/Hv.Quantower.cs

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+using System.Drawing;
+using System.Runtime.CompilerServices;
+using TradingPlatform.BusinessLayer;
+
+namespace QuanTAlib;
+
+[SkipLocalsInit]
+public sealed class HvIndicator : Indicator, IWatchlistIndicator
+{
+    [InputParameter("Period", sortIndex: 1, 2, 1000, 1, 0)]
+    public int Period { get; set; } = 20;
+
+    [InputParameter("Annualize", sortIndex: 2)]
+    public bool Annualize { get; set; } = true;
+
+    [InputParameter("Annual Periods", sortIndex: 3, 1, 365, 1, 0)]
+    public int AnnualPeriods { get; set; } = 252;
+
+    [InputParameter("Show cold values", sortIndex: 21)]
+    public bool ShowColdValues { get; set; } = true;
+
+    private Hv _hv = null!;
+    private readonly LineSeries _series;
+
+    public static int MinHistoryDepths => 0;
+    int IWatchlistIndicator.MinHistoryDepths => MinHistoryDepths;
+
+    public override string ShortName => $"HV {Period}";
+    public override string SourceCodeLink => "https://github.com/mihakralj/QuanTAlib/blob/main/lib/volatility/hv/Hv.Quantower.cs";
+
+    public HvIndicator()
+    {
+        OnBackGround = true;
+        SeparateWindow = true;
+        Name = "HV - Historical Volatility (Close-to-Close)";
+        Description = "Historical Volatility measures price volatility using standard deviation of logarithmic returns, the classical close-to-close volatility estimator";
+
+        _series = new LineSeries(name: "HV", color: IndicatorExtensions.Volatility, width: 2, style: LineStyle.Solid);
+        AddLineSeries(_series);
+    }
+
+    protected override void OnInit()
+    {
+        _hv = new Hv(Period, Annualize, AnnualPeriods);
+        base.OnInit();
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    protected override void OnUpdate(UpdateArgs args)
+    {
+        TBar bar = this.GetInputBar(args);
+        TValue result = _hv.Update(bar, isNew: args.IsNewBar());
+        _series.SetValue(result.Value, _hv.IsHot, ShowColdValues);
+    }
+}