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Toh4iem9
69 lines
5.0 KiB
Markdown
69 lines
5.0 KiB
Markdown
# Slow Stochastic RSI Pro
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## 1. Summary (Introduction)
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The Stochastic RSI (StochRSI), developed by Tushar Chande and Stanley Kroll, is an "indicator of an indicator." It applies the Stochastic Oscillator formula to a set of Relative Strength Index (RSI) values instead of standard price data. The primary goal is to identify overbought and oversold conditions with greater sensitivity than the RSI alone.
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The "Slow" version adds an extra layer of smoothing to its main line, making it less erratic. Our `StochRSI_Slow_Pro` is a unified, professional version that allows the underlying RSI calculation to be based on either **standard** or **Heikin Ashi** price data, and offers full customization of the Stochastic's smoothing methods.
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## 2. Mathematical Foundations and Calculation Logic
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The StochRSI builds upon the standard RSI and Stochastic formulas.
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### Required Components
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* **RSI:** The underlying data series for the calculation.
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* **Stochastic %K Period:** The lookback period for the highest and lowest RSI values.
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* **Slowing Period & MA Method:** The period and type of MA for the first smoothing step.
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* **%D Period & MA Method:** The period and type of MA for the signal line.
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### Calculation Steps (Algorithm)
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1. **Calculate the RSI:** First, calculate the standard RSI for a given period.
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2. **Calculate the Raw %K (Fast StochRSI):** Apply the Stochastic formula to the RSI data series.
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$\text{Raw \%K}_i = 100 \times \frac{\text{RSI}_i - \text{Lowest Low RSI}_{\text{Stoch Period}}}{\text{Highest High RSI}_{\text{Stoch Period}} - \text{Lowest Low RSI}_{\text{Stoch Period}}}$
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3. **Calculate the Slow %K (Main Line):** The Raw %K line is smoothed using the selected `Slowing MA Method` and `Slowing Period`.
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$\text{Slow \%K}_i = \text{MA}(\text{Raw \%K}, \text{Slowing Period}, \text{Slowing MA Method})_i$
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4. **Calculate the %D (Signal Line):** The signal line is a moving average of the Slow %K line.
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$\text{Slow \%D}_i = \text{MA}(\text{Slow \%K}, \text{\%D Period}, \text{\%D MA Method})_i$
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## 3. MQL5 Implementation Details
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Our MQL5 implementation follows a modern, component-based, object-oriented design.
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* **Component-Based Design (Composition):**
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The StochRSI calculator (`StochRSI_Slow_Calculator.mqh`) is a powerful orchestrator that reuses three of our core engines:
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1. **RSI Engine:** It delegates the RSI calculation to the shared `RSI_Engine.mqh`. This ensures that the underlying RSI values are identical to those of the standard RSI indicator.
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2. **Slowing Engine:** It uses a `MovingAverage_Engine.mqh` instance to smooth the Raw %K.
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3. **Signal Engine:** It uses another `MovingAverage_Engine.mqh` instance to calculate the %D line.
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This ensures mathematical consistency across the entire suite and eliminates code duplication.
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* **Advanced Smoothing Options:**
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Thanks to the integration with the `MovingAverage_Engine`, both smoothing steps support **seven** different methods (SMA, EMA, SMMA, LWMA, TMA, DEMA, TEMA).
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* **Optimized Incremental Calculation (O(1)):**
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Unlike basic implementations that recalculate the entire history on every tick, this indicator employs an intelligent incremental algorithm.
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* **State Tracking:** It utilizes `prev_calculated` to process only new bars.
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* **Persistent Buffers:** Internal buffers persist their state between ticks.
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* **Robust Offset Handling:** The engine correctly handles the initialization periods of the chained calculations (RSI -> Raw %K -> Slow %K -> %D), ensuring that each step starts only when valid data is available.
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* **Object-Oriented Logic:**
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* The Heikin Ashi version (`CStochRSI_Slow_Calculator_HA`) is achieved simply by instructing the main calculator to instantiate the Heikin Ashi version of the RSI Engine (`CRSIEngine_HA`).
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## 4. Parameters
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* **RSI Period (`InpRSIPeriod`):** The lookback period for the underlying RSI. (Default: `14`).
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* **Stochastic %K Period (`InpKPeriod`):** The lookback period for the Stochastic calculation on the RSI. (Default: `14`).
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* **Slowing Period (`InpSlowingPeriod`):** The smoothing period for the main Slow %K line. (Default: `3`).
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* **%D Period (`InpDPeriod`):** The smoothing period for the signal line. (Default: `3`).
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* **Applied Price (`InpSourcePrice`):** The source price for the underlying RSI. (Standard or Heikin Ashi).
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* **Slowing MA Type (`InpSlowingMAType`):** The MA type for the "Slowing" step. Supports: **SMA, EMA, SMMA, LWMA, TMA, DEMA, TEMA**. (Default: `SMA`).
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* **%D MA Type (`InpDMAType`):** The MA type for the "%D" signal line. Supports: **SMA, EMA, SMMA, LWMA, TMA, DEMA, TEMA**. (Default: `SMA`).
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## 5. Usage and Interpretation
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* **Overbought/Oversold Levels:** The primary use is to identify overbought (typically above 80) and oversold (typically below 20) conditions.
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* **Crossovers:** The crossover of the %K line and the %D signal line can be used to generate trade signals.
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* **Divergence:** Look for divergences between the StochRSI and the price action.
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* **Caution:** Due to its sensitivity, StochRSI can produce many false signals. It is best used for confirmation alongside other trend-following indicators.
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