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docs(indicators): Wrapper using CMO_Engine + MA Engine

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Indicators/MyIndicators/CMO_Pro.md
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The Chande Momentum Oscillator (CMO), developed by Tushar Chande, is a pure momentum indicator that measures the direction and strength of a trend. Unlike other oscillators like the RSI which can become "compressed" at their extremes, the CMO uses a distinct calculation that allows it to oscillate freely between -100 and +100.
It works by calculating the sum of all positive price changes and the sum of all negative price changes over a given period, and then expressing the difference as a percentage of the total movement.
Our `CMO_Pro` implementation is a comprehensive, professional version that significantly enhances the classic indicator. It includes:
* Values approaching **+100** indicate strong bullish momentum and potentially overbought conditions.
* Values approaching **-100** indicate strong bearish momentum and potentially oversold conditions.
* The **zero line** represents a point of equilibrium where bullish and bearish pressures are balanced.
Our `CMO_Pro` implementation is a professional, standalone version that allows the calculation to be based on either **standard** or **Heikin Ashi** price data.
* A fully customizable **Signal Line** for crossover strategies.
* Optional **Bollinger Bands** applied directly to the CMO, providing dynamic overbought/oversold levels based on momentum volatility.
* Support for both **standard** and **Heikin Ashi** price data.
## 2. Mathematical Foundations and Calculation Logic
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2. **Calculate the CMO Value:** The final CMO value is calculated using the following formula, which normalizes the result to the -100 to +100 range.
$\text{CMO}_i = 100 \times \frac{\text{Sum Up}_i - \text{Sum Down}_i}{\text{Sum Up}_i + \text{Sum Down}_i}$
3. **Calculate Signal Line:** A moving average of the CMO line is calculated.
4. **Calculate Bollinger Bands:** Standard Bollinger Bands are calculated on the CMO line, centered around the Signal Line.
## 3. MQL5 Implementation Details
Our MQL5 implementation is built on our standard, robust, and object-oriented framework.
* **Modular Calculator Engine (`CMO_Calculator.mqh`):**
All core calculation logic is encapsulated within a dedicated and reusable include file. This engine was efficiently created by refactoring the validated CMO logic from our `VIDYA_Calculator`, ensuring consistency and code reusability across the indicator suite.
All core calculation logic is encapsulated within a dedicated and reusable include file.
* **Composition:** The calculator internally uses our universal `MovingAverage_Engine.mqh` to handle the smoothing of the Signal Line. This allows for advanced smoothing types (like DEMA or TEMA) beyond the standard SMA.
* **Optimized Incremental Calculation (O(1)):**
Unlike basic implementations that recalculate the entire history on every tick, this indicator employs an intelligent incremental algorithm.
* **State Tracking:** It utilizes `prev_calculated` to process only new bars.
* **Persistent Buffers:** Internal buffers persist their state between ticks.
* **Robust Offset Handling:** The engine correctly handles the initialization periods of the chained calculations.
* **Object-Oriented Design (Inheritance):**
* A base class, `CCMOCalculator`, performs the full CMO calculation on a given source price.
* A derived class, `CCMOCalculator_HA`, inherits all the logic and only overrides the `PreparePriceSeries` method to supply Heikin Ashi data as the input. This clean polymorphic approach eliminates code duplication.
* **Simplified Main Indicator (`CMO_Pro.mq5`):**
The main `.mq5` file is a clean "wrapper" that handles user inputs, creates the appropriate calculator object (`standard` or `_HA`), and delegates the entire calculation with a single function call in `OnCalculate()`.
* **Stability via Full Recalculation:** The indicator performs a full recalculation on every tick. For a straightforward, non-recursive indicator like CMO, this ensures maximum stability and simplicity in the code.
* A derived class, `CCMOCalculator_HA`, inherits all the logic and only overrides the `PreparePriceSeries` method to supply Heikin Ashi data as the input.
## 4. Parameters (`CMO_Pro.mq5`)
* **CMO Period (`InpPeriodCMO`):** The lookback period for summing up and down price movements. A common value is `14`, but shorter periods (like `9`) will result in a more sensitive oscillator.
* **Applied Price (`InpSourcePrice`):** The source price for the calculation. This unified dropdown menu allows you to select from all standard and Heikin Ashi price types.
* **CMO Period (`InpPeriodCMO`):** The lookback period for summing up and down price movements. (Default: `14`).
* **Applied Price (`InpSourcePrice`):** The source price for the calculation. (Standard or Heikin Ashi).
* **Overlay Settings:**
* **Display Mode (`InpDisplayMode`):** Toggles between `CMO_Only`, `CMO_and_MA`, and `CMO_and_Bands`.
* **MA Period (`InpPeriodMA`):** The period for the signal line.
* **MA Method (`InpMethodMA`):** The type of moving average for the signal line. Supports: **SMA, EMA, SMMA, LWMA, TMA, DEMA, TEMA**.
* **Bands Deviation (`InpBandsDev`):** The standard deviation multiplier for the Bollinger Bands.
## 5. Usage and Interpretation
The CMO is a versatile tool for identifying momentum, overbought/oversold conditions, and potential trend reversals.
* **Overbought/Oversold Levels:**
* **CMO > +50:** The market is considered overbought, and bullish momentum may be overextended. This can be an early warning of a potential bearish reversal or consolidation.
* **CMO < -50:** The market is considered oversold, and bearish momentum may be exhausted. This can signal a potential bullish reversal or bounce.
* **CMO > +50:** The market is considered overbought.
* **CMO < -50:** The market is considered oversold.
* **Bollinger Bands:** When the CMO touches or exceeds its own Bollinger Bands, it signals an extreme statistical deviation in momentum, often preceding a reversal.
* **Zero Line Crossover:**
* A crossover **above the zero line** indicates that bullish momentum is now stronger than bearish momentum, confirming an uptrend.
* A crossover **below the zero line** indicates that bearish momentum has taken control, confirming a downtrend.
* The zero line can act as a filter; for example, only taking long trades when CMO is above 0.
* A crossover **above the zero line** indicates that bullish momentum is now stronger than bearish momentum.
* A crossover **below the zero line** indicates that bearish momentum has taken control.
* **Divergence:**
* **Bearish Divergence:** Occurs when the price makes a new high, but the CMO fails to make a new high. This suggests that the momentum behind the uptrend is weakening and a reversal may be near.
* **Bullish Divergence:** Occurs when the price makes a new low, but the CMO makes a higher low. This indicates that bearish momentum is fading and a bottom may be forming.
* **Signal Line Crossover:**
* A crossover of the CMO line and its Signal Line provides earlier entry/exit signals than the zero line cross.