Add Chaikin Money Flow (CMF) Indicator Implementation and Tests

- Implemented CMF indicator in Cmf.cs with detailed calculations and methods.
- Created unit tests for CMF validation against Skender, Ooples, and batch processing.
- Added documentation for CMF in Cmf.md, explaining its purpose, calculations, and usage.
- Updated project files to include new statistics library.
- Updated NDepend badges to reflect changes in classes, methods, and lines of code.

lib/channels/bbands/Bbands.Quantower.Tests.cs

@@ -0,0 +1,187 @@
+using TradingPlatform.BusinessLayer;
+
+namespace QuanTAlib.Tests;
+
+public class BbandsIndicatorTests
+{
+    [Fact]
+    public void BbandsIndicator_Constructor_SetsDefaults()
+    {
+        var indicator = new BbandsIndicator();
+
+        Assert.Equal(20, indicator.Period);
+        Assert.Equal(2.0, indicator.Multiplier);
+        Assert.Equal(SourceType.Close, indicator.Source);
+        Assert.True(indicator.ShowColdValues);
+        Assert.Equal("BBANDS - Bollinger Bands", indicator.Name);
+        Assert.False(indicator.SeparateWindow);
+        Assert.True(indicator.OnBackGround);
+    }
+
+    [Fact]
+    public void BbandsIndicator_MinHistoryDepths_EqualsPeriod()
+    {
+        var indicator = new BbandsIndicator { Period = 20 };
+
+        Assert.Equal(20, indicator.MinHistoryDepths);
+        Assert.Equal(20, ((IWatchlistIndicator)indicator).MinHistoryDepths);
+    }
+
+    [Fact]
+    public void BbandsIndicator_ShortName_IncludesPeriodAndMultiplier()
+    {
+        var indicator = new BbandsIndicator { Period = 15, Multiplier = 2.5 };
+
+        Assert.Contains("BBANDS", indicator.ShortName, StringComparison.Ordinal);
+        Assert.Contains("15", indicator.ShortName, StringComparison.Ordinal);
+        Assert.Contains("2.5", indicator.ShortName, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public void BbandsIndicator_Initialize_CreatesInternalBbands()
+    {
+        var indicator = new BbandsIndicator { Period = 10, Multiplier = 2.0 };
+
+        // Initialize should not throw
+        indicator.Initialize();
+
+        // After init, line series should exist
+        Assert.Equal(5, indicator.LinesSeries.Count); // Middle, Upper, Lower, Width, %B
+    }
+
+    [Fact]
+    public void BbandsIndicator_ProcessUpdate_HistoricalBar_ComputesValue()
+    {
+        var indicator = new BbandsIndicator { Period = 3, Multiplier = 2.0 };
+        indicator.Initialize();
+
+        // Add historical data
+        var now = DateTime.UtcNow;
+        indicator.HistoricalData.AddBar(now, 100, 105, 95, 102);
+
+        // Process update
+        var args = new UpdateArgs(UpdateReason.HistoricalBar);
+        indicator.ProcessUpdate(args);
+
+        // Line series should have values
+        Assert.Equal(1, indicator.LinesSeries[0].Count);
+        Assert.True(double.IsFinite(indicator.LinesSeries[0].GetValue(0)));
+    }
+
+    [Fact]
+    public void BbandsIndicator_ProcessUpdate_NewBar_ComputesValue()
+    {
+        var indicator = new BbandsIndicator { Period = 3, Multiplier = 2.0 };
+        indicator.Initialize();
+
+        var now = DateTime.UtcNow;
+        indicator.HistoricalData.AddBar(now, 100, 105, 95, 102);
+        indicator.HistoricalData.AddBar(now.AddMinutes(1), 102, 108, 100, 106);
+
+        indicator.ProcessUpdate(new UpdateArgs(UpdateReason.HistoricalBar));
+        indicator.ProcessUpdate(new UpdateArgs(UpdateReason.NewBar));
+
+        Assert.Equal(2, indicator.LinesSeries[0].Count);
+    }
+
+    [Fact]
+    public void BbandsIndicator_ProcessUpdate_NewTick_ProcessesWithoutError()
+    {
+        var indicator = new BbandsIndicator { Period = 3, Multiplier = 2.0 };
+        indicator.Initialize();
+
+        var now = DateTime.UtcNow;
+        indicator.HistoricalData.AddBar(now, 100, 105, 95, 102);
+
+        indicator.ProcessUpdate(new UpdateArgs(UpdateReason.HistoricalBar));
+        double firstValue = indicator.LinesSeries[0].GetValue(0);
+
+        indicator.ProcessUpdate(new UpdateArgs(UpdateReason.NewTick));
+        double secondValue = indicator.LinesSeries[0].GetValue(0);
+
+        Assert.True(double.IsFinite(firstValue));
+        Assert.True(double.IsFinite(secondValue));
+    }
+
+    [Fact]
+    public void BbandsIndicator_MultipleUpdates_ProducesCorrectSequence()
+    {
+        var indicator = new BbandsIndicator { Period = 3, Multiplier = 2.0 };
+        indicator.Initialize();
+
+        var now = DateTime.UtcNow;
+        double[] closes = { 100, 102, 104, 103, 105 };
+
+        foreach (var close in closes)
+        {
+            indicator.HistoricalData.AddBar(now, close, close + 2, close - 2, close);
+            indicator.ProcessUpdate(new UpdateArgs(UpdateReason.HistoricalBar));
+            now = now.AddMinutes(1);
+        }
+
+        // All values should be finite
+        for (int i = 0; i < closes.Length; i++)
+        {
+            Assert.True(double.IsFinite(indicator.LinesSeries[0].GetValue(closes.Length - 1 - i)));
+        }
+
+        // Middle band should be close to the average of last 3 values
+        double lastMiddle = indicator.LinesSeries[0].GetValue(0);
+        Assert.True(lastMiddle >= 102 && lastMiddle <= 106);
+    }
+
+    [Fact]
+    public void BbandsIndicator_DifferentSourceTypes_Work()
+    {
+        var sources = new[] { SourceType.Open, SourceType.High, SourceType.Low, SourceType.Close, SourceType.HL2, SourceType.HLC3 };
+
+        foreach (var source in sources)
+        {
+            var indicator = new BbandsIndicator { Period = 3, Multiplier = 2.0, Source = source };
+            indicator.Initialize();
+
+            var now = DateTime.UtcNow;
+            indicator.HistoricalData.AddBar(now, 100, 110, 90, 105);
+            indicator.ProcessUpdate(new UpdateArgs(UpdateReason.HistoricalBar));
+
+            Assert.True(double.IsFinite(indicator.LinesSeries[0].GetValue(0)),
+                $"Source {source} should produce finite value");
+        }
+    }
+
+    [Fact]
+    public void BbandsIndicator_Parameters_CanBeChanged()
+    {
+        var indicator = new BbandsIndicator { Period = 5, Multiplier = 1.5 };
+        Assert.Equal(5, indicator.Period);
+        Assert.Equal(1.5, indicator.Multiplier);
+
+        indicator.Period = 20;
+        indicator.Multiplier = 2.5;
+        Assert.Equal(20, indicator.Period);
+        Assert.Equal(2.5, indicator.Multiplier);
+        Assert.Equal(20, indicator.MinHistoryDepths);
+    }
+
+    [Fact]
+    public void BbandsIndicator_AllBandsUpdate_Correctly()
+    {
+        var indicator = new BbandsIndicator { Period = 3, Multiplier = 2.0 };
+        indicator.Initialize();
+
+        var now = DateTime.UtcNow;
+        for (int i = 0; i < 5; i++)
+        {
+            indicator.HistoricalData.AddBar(now.AddMinutes(i), 100 + i, 105 + i, 95 + i, 102 + i);
+            indicator.ProcessUpdate(new UpdateArgs(UpdateReason.HistoricalBar));
+        }
+
+        // Verify all 5 line series have values
+        Assert.Equal(5, indicator.LinesSeries.Count);
+        foreach (var series in indicator.LinesSeries)
+        {
+            Assert.Equal(5, series.Count);
+            Assert.True(double.IsFinite(series.GetValue(0)));
+        }
+    }
+}