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refactor: Optimized for incremental calculation

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Toh4iem9
2025-11-29 13:40:45 +01:00
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Indicators/MyIndicators/Authors/Ehlers/4_Channels_and_Bands/Ehlers_Bands_Pro.md
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# Ehlers Bands Professional
# Ehlers Bands Pro
## 1. Summary (Introduction)
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## 3. MQL5 Implementation Details
* **Modular Architecture:** The `Ehlers_Bands_Calculator` is built on top of our existing, robust `Ehlers_Smoother_Calculator`. It instantiates a smoother object internally to calculate the centerline, demonstrating the power of reusable code modules.
* **Heikin Ashi Integration:** The indicator fully supports Heikin Ashi data. When selected, both the centerline and the standard deviation are calculated based on the smoothed HA values.
* **Stability via Full Recalculation:** The indicator employs a full recalculation on every `OnCalculate` call to ensure the stateful calculations are always stable and accurate.
* **Optimized Incremental Calculation:**
Unlike basic implementations that recalculate the entire history on every tick, this indicator employs an intelligent incremental algorithm.
* It utilizes the `prev_calculated` state to determine the exact starting point for updates.
* **Persistent State:** The internal price buffer (`m_price`) persists between ticks. This allows the standard deviation calculation to access historical price data efficiently without re-copying or re-calculating the entire series.
* This results in **O(1) complexity** per tick, ensuring instant updates and zero lag, even on charts with extensive history.
* **Heikin Ashi Integration:** The indicator fully supports Heikin Ashi data. When selected, both the centerline and the standard deviation are calculated based on the smoothed HA values, leveraging the same optimized engine.
## 4. Parameters