new files added

Indicators/MyIndicators/Authors/Ehlers/4_Channels_and_Bands/Ehlers_Channel_Pro.md

@@ -0,0 +1,53 @@
+# Ehlers Channel Pro
+
+## 1. Summary (Introduction)
+
+The **Ehlers Channel Pro** is a sophisticated variation of the Keltner Channel that leverages John Ehlers' advanced digital signal processing filters for the centerline.
+
+Instead of a standard Moving Average, it uses either the **SuperSmoother** or the **UltimateSmoother**. These filters are designed to eliminate aliasing noise and provide a cleaner representation of the underlying trend with minimal lag. This results in a channel that is more stable during ranging markets and more responsive during trends compared to traditional EMA-based channels.
+
+The bands are calculated using the **Average True Range (ATR)**, providing a volatility-adjusted envelope.
+
+## 2. Mathematical Foundations
+
+The indicator combines two robust algorithms:
+
+1. **Centerline (Ehlers Filter):**
+    * **SuperSmoother:** A 2-pole Butterworth filter optimized for removing noise while retaining trend.
+    * **UltimateSmoother:** A variation designed to have even less lag in certain conditions.
+    * Both filters use complex coefficients derived from the cutoff `Period`.
+
+2. **Bands (ATR):**
+    * $\text{Upper Band}_t = \text{Smoother}_t + (\text{Multiplier} \times \text{ATR}_t)$
+    * $\text{Lower Band}_t = \text{Smoother}_t - (\text{Multiplier} \times \text{ATR}_t)$
+
+## 3. MQL5 Implementation Details
+
+* **Modular Design:** The calculator (`Ehlers_Channel_Calculator.mqh`) composes two independent engines: `CEhlersSmootherCalculator` for the centerline and `CATRCalculator` for the bands.
+* **O(1) Incremental Calculation:** Optimized for high performance.
+* **Heikin Ashi Integration:** Full support for Heikin Ashi price data for both the centerline and the ATR calculation.
+
+## 4. Parameters
+
+### Smoother Settings (Centerline)
+
+* **Smoother Type:** Select between `SUPERSMOOTHER` and `ULTIMATESMOOTHER`.
+* **Period:** The cutoff period for the filter (e.g., 20). Lower values make it faster but noisier.
+* **Price Source:** Selects the input data (Standard or Heikin Ashi).
+
+### Channel Settings (Bands)
+
+* **ATR Period:** The lookback period for volatility. Default is `14`.
+* **Multiplier:** The width of the channel in ATR units. Default is `2.0`.
+* **ATR Source:** Selects whether to use Standard or Heikin Ashi candles for the ATR calculation.
+
+## 5. Usage and Interpretation
+
+### Trend Following
+
+* **Breakout:** A candle close outside the channel often signals the start of a trend. The smoothness of the Ehlers filter helps filter out false breakouts caused by short-term noise spikes.
+* **Trend Riding:** In a strong trend, price tends to stay between the centerline and the outer band.
+
+### Mean Reversion
+
+* **Rejection:** When the centerline is flat (indicating a range), price rejections at the outer bands are high-probability reversal signals targeting the centerline.