SIMD Refactor: Merge simd-dev into dev (#55)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: aider (openrouter/anthropic/claude-sonnet-4) <aider@aider.chat>
Co-authored-by: Warp <agent@warp.dev>

lib/dynamics/dmx/Dmx.Validation.Tests.cs

@@ -0,0 +1,98 @@
+using Xunit.Abstractions;
+
+namespace QuanTAlib.Tests;
+
+public class DmxValidationTests
+{
+    private readonly ITestOutputHelper _output;
+
+    public DmxValidationTests(ITestOutputHelper output)
+    {
+        _output = output;
+    }
+
+    [Fact]
+    public void Validate_Consistency_UpdateVsSeries()
+    {
+        var gbm = new GBM();
+        var bars = gbm.Fetch(1000, DateTime.UtcNow.Ticks, TimeSpan.FromMinutes(1));
+
+        var dmx = new Dmx(14);
+        var streamResult = new TSeries();
+        for (int i = 0; i < bars.Count; i++)
+        {
+            streamResult.Add(dmx.Update(bars[i]));
+        }
+
+        var dmx2 = new Dmx(14);
+        var seriesResult = dmx2.Update(bars);
+
+        Assert.Equal(streamResult.Count, seriesResult.Count);
+        for (int i = 0; i < bars.Count; i++)
+        {
+            Assert.Equal(streamResult[i].Value, seriesResult[i].Value, ValidationHelper.DefaultTolerance);
+        }
+        _output.WriteLine("DMX Update vs Series validated successfully");
+    }
+
+    [Fact]
+    public void Validate_Range()
+    {
+        var gbm = new GBM();
+        var bars = gbm.Fetch(1000, DateTime.UtcNow.Ticks, TimeSpan.FromMinutes(1));
+
+        var dmx = new Dmx(14);
+        for (int i = 0; i < bars.Count; i++)
+        {
+            var val = dmx.Update(bars[i]).Value;
+            Assert.True(val >= -100.0 && val <= 100.0, $"DMX value {val} out of range [-100, 100]");
+        }
+        _output.WriteLine("DMX range validated successfully");
+    }
+
+    [Fact]
+    public void Validate_Trend_Direction()
+    {
+        // Create a synthetic uptrend
+        var bars = new TBarSeries();
+        var time = DateTime.UtcNow;
+        double price = 100;
+        for (int i = 0; i < 100; i++)
+        {
+            bars.Add(time, price, price + 2, price - 1, price + 1, 1000);
+            time = time.AddMinutes(1);
+            price += 1.0; // Steady uptrend
+        }
+
+        var dmx = new Dmx(14);
+        var result = dmx.Update(bars);
+
+        // Check the last few values, they should be positive
+        for (int i = 80; i < 100; i++)
+        {
+            Assert.True(result[i].Value > 0, $"DMX should be positive in uptrend at index {i}, got {result[i].Value}");
+        }
+
+        // Create a synthetic downtrend
+        bars = new TBarSeries();
+        time = DateTime.UtcNow;
+        price = 200;
+        for (int i = 0; i < 100; i++)
+        {
+            bars.Add(time, price, price + 1, price - 2, price - 1, 1000);
+            time = time.AddMinutes(1);
+            price -= 1.0; // Steady downtrend
+        }
+
+        dmx = new Dmx(14);
+        result = dmx.Update(bars);
+
+        // Check the last few values, they should be negative
+        for (int i = 80; i < 100; i++)
+        {
+            Assert.True(result[i].Value < 0, $"DMX should be negative in downtrend at index {i}, got {result[i].Value}");
+        }
+
+        _output.WriteLine("DMX trend direction validated successfully");
+    }
+}