Add Vortex Indicator implementation and documentation

- Implemented Vortex Indicator in Vortex.cs, including calculation logic and event handling.
- Added detailed documentation for Vortex Indicator in Vortex.md, covering historical context, algorithm, outputs, and trading interpretation.
- Updated oscillators index to include TTM Wave indicator.
- Added TTM Wave documentation with algorithm and trading interpretation.
- Updated reversals index to include TTM Scalper Alert indicator.
- Added TTM Scalper Alert documentation with algorithm and trading strategy.
- Updated NDepend badges to reflect increased code metrics (classes, methods, lines of code, public types, comments, and complexity).

lib/channels/_index.md

@@ -26,6 +26,7 @@ Channels define dynamic support and resistance. Upper band shows where price ten
 | [SDCHANNEL](sdchannel/SdChannel.md) | Standard Deviation Channel | Moving average with standard deviation bands. |
 | [STARCHANNEL](starchannel/StarChannel.md) | Stoller Average Range Channel | SMA with ATR bands. Similar to Keltner but uses SMA instead of EMA. |
 | [STBANDS](stbands/Stbands.md) | Super Trend Bands | ATR-based trend-following bands. Flips direction on breakout. |
+| [TTM_LRC](ttm_lrc/TtmLrc.md) | TTM Linear Regression Channel | Linear regression with ±1σ/±2σ bands. John Carter. |
 | [UBANDS](ubands/Ubands.md) | Ehlers Ultimate Bands | USF-based volatility channel with RMS bands. Zero-lag smoothing by Ehlers. |
 | [UCHANNEL](uchannel/Uchannel.md) | Ehlers Ultimate Channel | USF-based volatility channel with Smoothed True Range bands. Zero-lag by Ehlers. |
 | [VWAPBANDS](vwapbands/Vwapbands.md) | VWAP Bands | Volume-weighted average price with dual ±1σ and ±2σ standard deviation bands. |

lib/channels/ttm_lrc/TtmLrc.md

@@ -0,0 +1,76 @@
+# TTM_LRC: TTM Linear Regression Channel
+
+> **Pending Implementation** - Placeholder for John Carter's TTM LRC indicator
+
+## Historical Context
+
+John Carter's TTM LRC (Linear Regression Channel) provides a clean, statistically-based price channel using linear regression analysis. Unlike Bollinger Bands which measure volatility around a moving average, LRC measures price deviation from the trend line, making it particularly useful for identifying overbought/oversold conditions within a defined trend.
+
+## Algorithm
+
+### Linear Regression Line
+```
+// Least squares regression over N periods
+slope = (N * ΣXY - ΣX * ΣY) / (N * ΣX² - (ΣX)²)
+intercept = (ΣY - slope * ΣX) / N
+midline = intercept + slope * (current_bar - start_bar)
+```
+
+### Standard Deviation Bands
+```
+residuals = close - linreg_value
+stddev = sqrt(Σ(residuals²) / N)
+
+upper_band_1 = midline + 1 * stddev
+lower_band_1 = midline - 1 * stddev
+upper_band_2 = midline + 2 * stddev
+lower_band_2 = midline - 2 * stddev
+```
+
+## Default Parameters
+
+| Parameter | Value | Description |
+|:----------|:------|:------------|
+| Length | 100 | Regression lookback period |
+| Deviations | 2.0 | Number of standard deviations for outer bands |
+| ShowMidline | true | Display the regression line |
+| ShowInnerBands | true | Display ±1σ bands |
+
+## Outputs
+
+| Output | Type | Description |
+|:-------|:-----|:------------|
+| Midline | double | Linear regression value (trend line) |
+| Upper1 | double | +1 standard deviation band |
+| Lower1 | double | -1 standard deviation band |
+| Upper2 | double | +2 standard deviation band |
+| Lower2 | double | -2 standard deviation band |
+| Slope | double | Current regression slope (trend direction) |
+| RSquared | double | Coefficient of determination (trend quality) |
+
+## Band Interpretation
+
+| Zone | Statistical Meaning | Trading Implication |
+|:-----|:--------------------|:--------------------|
+| Above +2σ | 2.5% probability | Extremely overbought |
+| +1σ to +2σ | 13.5% probability | Overbought |
+| -1σ to +1σ | 68% probability | Normal range |
+| -2σ to -1σ | 13.5% probability | Oversold |
+| Below -2σ | 2.5% probability | Extremely oversold |
+
+## Trading Strategy
+
+1. **Trend Following:** Trade in direction of slope when price bounces off midline
+2. **Mean Reversion:** Fade moves to ±2σ bands when R² is high
+3. **Breakout:** Watch for sustained moves beyond ±2σ as trend acceleration signals
+
+## Category
+
+**Channels** - Linear regression-based price channel with statistical deviation bands.
+
+## See Also
+
+- [REGCHANNEL: Linear Regression Channel](../regchannel/RegChannel.md)
+- [SDCHANNEL: Standard Deviation Channel](../sdchannel/SdChannel.md)
+- [BBANDS: Bollinger Bands](../bbands/Bbands.md)
+- [TTM_SQUEEZE: TTM Squeeze](../../dynamics/ttm_squeeze/TtmSqueeze.md)