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Toh4iem9
240 lines
8.9 KiB
Plaintext
240 lines
8.9 KiB
Plaintext
//+------------------------------------------------------------------+
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//| VIDYA_Calculator.mqh |
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//| Universal engine for VIDYA (single and multi-color). |
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//| VERSION 3.00: Implemented method overloading. |
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//| Copyright 2025, xxxxxxxx |
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//+------------------------------------------------------------------+
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#property copyright "Copyright 2025, xxxxxxxx"
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#include <MyIncludes\HeikinAshi_Tools.mqh>
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//+==================================================================+
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class CVIDYACalculator
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{
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protected:
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int m_cmo_period, m_ema_period;
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double m_price[];
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double CalculateCMO(int position, int period, const double &price_array[]);
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virtual bool PreparePriceSeries(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[]);
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public:
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CVIDYACalculator(void) {};
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virtual ~CVIDYACalculator(void) {};
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bool Init(int cmo_p, int ema_p);
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//--- Overloaded Method 1: For single-color VIDYA
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void Calculate(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[],
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double &vidya_buffer[]);
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//--- Overloaded Method 2: For multi-color VIDYA
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void Calculate(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[],
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double &vidya_up_buffer[], double &vidya_down_buffer[]);
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};
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//+------------------------------------------------------------------+
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bool CVIDYACalculator::Init(int cmo_p, int ema_p)
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{
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m_cmo_period = (cmo_p < 1) ? 1 : cmo_p;
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m_ema_period = (ema_p < 1) ? 1 : ema_p;
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return true;
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}
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//+------------------------------------------------------------------+
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//| Implementation for SINGLE-COLOR VIDYA |
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//+------------------------------------------------------------------+
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void CVIDYACalculator::Calculate(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[],
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double &vidya_buffer[])
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{
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int start_pos = m_cmo_period + m_ema_period;
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if(rates_total <= start_pos)
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return;
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if(!PreparePriceSeries(rates_total, price_type, open, high, low, close))
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return;
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double alpha = 2.0 / (m_ema_period + 1.0);
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for(int i = 1; i < rates_total; i++)
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{
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if(i == start_pos)
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{
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double sum=0;
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for(int j=0; j<m_ema_period; j++)
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sum+=m_price[i-j];
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vidya_buffer[i]=sum/m_ema_period;
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continue;
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}
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if(i > start_pos)
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{
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double cmo_abs = MathAbs(CalculateCMO(i, m_cmo_period, m_price));
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vidya_buffer[i] = m_price[i] * alpha * cmo_abs + vidya_buffer[i-1] * (1 - alpha * cmo_abs);
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}
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}
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}
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//+------------------------------------------------------------------+
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//| Implementation for MULTI-COLOR VIDYA |
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//+------------------------------------------------------------------+
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void CVIDYACalculator::Calculate(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[],
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double &vidya_up_buffer[], double &vidya_down_buffer[])
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{
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int start_pos = m_cmo_period + m_ema_period;
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if(rates_total <= start_pos)
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return;
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if(!PreparePriceSeries(rates_total, price_type, open, high, low, close))
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return;
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double alpha = 2.0 / (m_ema_period + 1.0);
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double prev_vidya = 0.0;
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for(int i = 1; i < rates_total; i++)
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{
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vidya_up_buffer[i] = EMPTY_VALUE;
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vidya_down_buffer[i] = EMPTY_VALUE;
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if(i == start_pos)
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{
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double sum=0;
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for(int j=0; j<m_ema_period; j++)
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sum+=m_price[i-j];
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prev_vidya = sum/m_ema_period;
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double cmo_raw = CalculateCMO(i, m_cmo_period, m_price);
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if(cmo_raw > 0)
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vidya_up_buffer[i] = prev_vidya;
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else
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vidya_down_buffer[i] = prev_vidya;
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}
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if(i > start_pos)
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{
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double cmo_raw = CalculateCMO(i, m_cmo_period, m_price);
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double cmo_abs = MathAbs(cmo_raw);
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double current_vidya = m_price[i] * alpha * cmo_abs + prev_vidya * (1 - alpha * cmo_abs);
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if(cmo_raw > 0)
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vidya_up_buffer[i] = current_vidya;
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else
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vidya_down_buffer[i] = current_vidya;
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double cmo_raw_prev = CalculateCMO(i-1, m_cmo_period, m_price);
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if((cmo_raw > 0) != (cmo_raw_prev > 0))
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{
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vidya_up_buffer[i-1] = prev_vidya;
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vidya_down_buffer[i-1] = prev_vidya;
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}
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prev_vidya = current_vidya;
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}
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}
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}
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//+------------------------------------------------------------------+
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//| CVIDYACalculator: Helper to calculate CMO |
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//+------------------------------------------------------------------+
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double CVIDYACalculator::CalculateCMO(int position, int period, const double &price_array[])
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{
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if(position < period)
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return 0.0;
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double sum_up = 0.0, sum_down = 0.0;
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for(int i = 0; i < period; i++)
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{
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double diff = price_array[position - i] - price_array[position - i - 1];
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if(diff > 0.0)
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sum_up += diff;
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else
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sum_down += (-diff);
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}
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if(sum_up + sum_down == 0.0)
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return 0.0;
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return (sum_up - sum_down) / (sum_up + sum_down);
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}
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//+------------------------------------------------------------------+
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//| CVIDYACalculator: Prepares the standard source price. |
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//+------------------------------------------------------------------+
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bool CVIDYACalculator::PreparePriceSeries(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[])
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{
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ArrayResize(m_price, rates_total);
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switch(price_type)
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{
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case PRICE_CLOSE:
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ArrayCopy(m_price, close, 0, 0, rates_total);
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break;
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case PRICE_OPEN:
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ArrayCopy(m_price, open, 0, 0, rates_total);
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break;
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case PRICE_HIGH:
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ArrayCopy(m_price, high, 0, 0, rates_total);
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break;
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case PRICE_LOW:
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ArrayCopy(m_price, low, 0, 0, rates_total);
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break;
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case PRICE_MEDIAN:
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for(int i=0; i<rates_total; i++)
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m_price[i] = (high[i]+low[i])/2.0;
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break;
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case PRICE_TYPICAL:
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for(int i=0; i<rates_total; i++)
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m_price[i] = (high[i]+low[i]+close[i])/3.0;
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break;
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case PRICE_WEIGHTED:
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for(int i=0; i<rates_total; i++)
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m_price[i] = (high[i]+low[i]+close[i]+close[i])/4.0;
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break;
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default:
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return false;
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}
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return true;
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}
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//+==================================================================+
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class CVIDYACalculator_HA : public CVIDYACalculator
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{
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private:
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CHeikinAshi_Calculator m_ha_calculator;
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protected:
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virtual bool PreparePriceSeries(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[]) override;
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};
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//+------------------------------------------------------------------+
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bool CVIDYACalculator_HA::PreparePriceSeries(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[])
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{
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double ha_open[], ha_high[], ha_low[], ha_close[];
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ArrayResize(ha_open, rates_total);
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ArrayResize(ha_high, rates_total);
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ArrayResize(ha_low, rates_total);
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ArrayResize(ha_close, rates_total);
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m_ha_calculator.Calculate(rates_total, open, high, low, close, ha_open, ha_high, ha_low, ha_close);
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ArrayResize(m_price, rates_total);
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switch(price_type)
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{
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case PRICE_CLOSE:
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ArrayCopy(m_price, ha_close, 0, 0, rates_total);
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break;
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case PRICE_OPEN:
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ArrayCopy(m_price, ha_open, 0, 0, rates_total);
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break;
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case PRICE_HIGH:
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ArrayCopy(m_price, ha_high, 0, 0, rates_total);
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break;
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case PRICE_LOW:
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ArrayCopy(m_price, ha_low, 0, 0, rates_total);
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break;
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case PRICE_MEDIAN:
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for(int i=0; i<rates_total; i++)
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m_price[i] = (ha_high[i]+ha_low[i])/2.0;
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break;
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case PRICE_TYPICAL:
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for(int i=0; i<rates_total; i++)
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m_price[i] = (ha_high[i]+ha_low[i]+ha_close[i])/3.0;
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break;
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case PRICE_WEIGHTED:
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for(int i=0; i<rates_total; i++)
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m_price[i] = (ha_high[i]+ha_low[i]+ha_close[i]+ha_close[i])/4.0;
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break;
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default:
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return false;
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}
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return true;
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}
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//+------------------------------------------------------------------+
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//+------------------------------------------------------------------+
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