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refactor: Optimized for incremental calculation

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Toh4iem9
2025-11-28 16:58:00 +01:00
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Indicators/MyIndicators/MovingAverage_Ribbon_MTF_Pro.md
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# Moving Average Ribbon MTF Professional
# Moving Average Ribbon MTF Pro
## 1. Summary (Introduction)
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* **Timeframe** for each of the 4 lines.
* **Period** for each of the 4 lines.
* **MA Type** (SMA, EMA, SMMA, LWMA) for each of the 4 lines.
* **MA Type** (SMA, EMA, SMMA, LWMA, TMA, DEMA, TEMA) for each of the 4 lines.
* **Price Source** (Standard or Heikin Ashi).
## 2. Mathematical Foundations and Calculation Logic
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This indicator is built on a robust, `iCustom()`-free, and highly modular "multi-engine" architecture to handle its complexity.
* **Specialized MTF Engine (`Single_MA_MTF_Calculator.mqh`):** We first created a dedicated, reusable engine whose sole responsibility is to calculate one single moving average on one specific timeframe.
* **"Manager" Calculator (`MovingAverage_Ribbon_MTF_Calculator.mqh`):** The main engine for this ribbon indicator uses the composition design pattern. It **contains four independent instances** of the `CSingleMAMTFCalculator`.
* **Modular "Manager" Calculator (`MovingAverage_Ribbon_Calculator.mqh`):** The main engine for this ribbon indicator uses the composition design pattern. It **contains four independent instances** of the `CMovingAverageCalculator`.
* The main engine acts as a "manager," delegating the complete calculation of each line to one of the specialized single-line calculators.
* This architecture perfectly separates concerns, ensuring the code is clean, stable, and easy to maintain, despite the indicator's complexity.
* This architecture perfectly separates concerns, ensuring the code is clean, stable, and easy to maintain.
* **Optimized Incremental Calculation:**
Despite managing four separate MTF calculations simultaneously, the indicator remains extremely efficient.
* Each of the four internal calculators tracks its own state and utilizes the `prev_calculated` optimization.
* **Persistent State:** The internal buffers for recursive calculations (EMA, SMMA, DEMA, TEMA) persist between ticks for each line independently.
* This ensures that the indicator runs with **O(1) complexity** per tick, updating all four lines instantly without re-processing history.
* **No External Dependencies:** The entire calculation is self-contained. It directly fetches the required higher-timeframe price data using built-in `Copy...` functions, making the indicator fully portable and robust.
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* **MA 1-4 Settings:**
* **`InpTimeframe1` - `InpTimeframe4`:** The source timeframe for each line. `PERIOD_CURRENT` will use the chart's active timeframe.
* **`InpPeriod1` - `InpPeriod4`:** The lookback period for each line.
* **`InpMAType1` - `InpMAType4`:** The MA type (SMA, EMA, SMMA, LWMA) for each line.
* **`InpMAType1` - `InpMAType4`:** The MA type (SMA, EMA, SMMA, LWMA, TMA, DEMA, TEMA) for each line.
* **Price Source:**
* **`InpSourcePrice`:** The source price for all calculations (Standard or Heikin Ashi).