Add validation tests for USF and enhance ATR indicator tests

- Introduced Usf.Validation.Tests.cs to validate the USF (Ehlers Ultimate Smoother Filter) for consistency across batch, streaming, and span modes, as well as mathematical properties and coefficient calculations. - Added comprehensive tests for the ATR indicator in Atr.Quantower.Tests.cs, including constructor validation, historical data processing, and handling of NaN/Infinity inputs. - Enhanced Atr.Tests.cs with additional tests for iterative corrections, warmup behavior, and true range calculations. - Updated Atr.cs to ensure warmup period is derived from RMA. - Added new tests for Adosc in Adosc.Tests.cs to validate handling of NaN and Infinity inputs, and to ensure batch calculations match iterative results. - Created a new Volatility.csproj to organize volatility-related implementations.
2026-08-25 05:48:06 +00:00 · 2025-12-28 23:33:46 -08:00
parent 3cc2726654
commit 84ff67fb50
22 changed files with 2813 additions and 1284 deletions
@@ -0,0 +1,68 @@
+using System.Drawing;
+using System.Runtime.CompilerServices;
+using TradingPlatform.BusinessLayer;
+
+namespace QuanTAlib;
+
+[SkipLocalsInit]
+public sealed class BetaIndicator : Indicator, IWatchlistIndicator
+{
+    [InputParameter("Period", sortIndex: 1, 1, 2000, 1, 0)]
+    public int Period { get; set; } = 20;
+
+    [InputParameter("Asset Source", sortIndex: 2)]
+    public SourceType AssetSource { get; set; } = SourceType.Close;
+
+    [InputParameter("Market Source", sortIndex: 3)]
+    public SourceType MarketSource { get; set; } = SourceType.Close;
+
+    [InputParameter("Show cold values", sortIndex: 21)]
+    public bool ShowColdValues { get; set; } = true;
+
+    private Beta? _beta;
+    private readonly LineSeries? _series;
+    private Func<IHistoryItem, double>? _assetSelector;
+    private Func<IHistoryItem, double>? _marketSelector;
+
+    public static int MinHistoryDepths => 2;
+    int IWatchlistIndicator.MinHistoryDepths => MinHistoryDepths;
+
+    public override string ShortName => $"Beta({Period})";
+    public override string SourceCodeLink => "https://github.com/mihakralj/QuanTAlib/blob/main/lib/statistics/beta/Beta.Quantower.cs";
+
+    public BetaIndicator()
+    {
+        OnBackGround = true;
+        SeparateWindow = true;
+        Name = "Beta Coefficient";
+        Description = "Measures the volatility of an asset in relation to the overall market.";
+
+        _series = new(name: "Beta", color: IndicatorExtensions.Statistics, width: 2, style: LineStyle.Solid);
+        AddLineSeries(_series);
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    protected override void OnInit()
+    {
+        _beta = new Beta(Period);
+        _assetSelector = AssetSource.GetPriceSelector();
+        _marketSelector = MarketSource.GetPriceSelector();
+        base.OnInit();
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    protected override void OnUpdate(UpdateArgs args)
+    {
+        var item = this.HistoricalData[this.Count - 1, SeekOriginHistory.Begin];
+        double assetVal = _assetSelector!(item);
+        double marketVal = _marketSelector!(item);
+        var time = this.HistoricalData.Time();
+
+        var assetInput = new TValue(time, assetVal);
+        var marketInput = new TValue(time, marketVal);
+
+        TValue result = _beta!.Update(assetInput, marketInput, args.IsNewBar());
+
+        _series!.SetValue(result.Value, _beta.IsHot, ShowColdValues);
+    }
+}