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refactor: Optimized for incremental calculation

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Toh4iem9
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Indicators/MyIndicators/McGinleyDynamic_Pro.md
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# McGinley Dynamic Professional
# McGinley Dynamic Pro
## 1. Summary (Introduction)
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* **Modular Calculation Engine (`McGinleyDynamic_Calculator.mqh`):**
The entire calculation logic is encapsulated within a reusable include file.
* **`CMcGinleyDynamicCalculator`**: The base class that handles price preparation.
* **`CMcGinleyDynamicCalculator`**: The base class that handles price preparation and the core algorithm.
* **`CMcGinleyDynamicCalculator_HA`**: A child class that overrides the data preparation step to use smoothed Heikin Ashi prices.
* **`CMcGinleyFilter`**: A dedicated internal class that manages the stateful, recursive calculation, ensuring stability.
* **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 buffers (`m_price`, `mcginley_buffer`) persist their state between ticks. This allows the recursive calculation to continue seamlessly from the last known value without re-processing the entire history.
* This results in **O(1) complexity** per tick, ensuring instant updates and zero lag.
* **Robust Initialization and Overflow Protection:**
* **SMA Initialization:** The recursive calculation is properly "primed" by using an `N`-period Simple Moving Average for its first value, as suggested by modern, robust implementations.
* **Overflow Protection:** To prevent floating-point overflows on highly volatile instruments (like cryptocurrencies), the `(Price / Previous_Value)` ratio is "clamped" within a reasonable range before the `^4` power is applied. This makes the indicator stable under all market conditions.
* **Stability via Full Recalculation:** We employ a "brute-force" full recalculation within `OnCalculate` for maximum stability.
## 4. Parameters
* **Length (`InpLength`):** The base period for the indicator. Default is `14`.