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Toh4iem9
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//+------------------------------------------------------------------+
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//| MovingAverage_Engine.mqh |
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//| Universal engine for standard moving averages (SMA, EMA...).|
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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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//--- Enum to select the MA type for calculation ---
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enum ENUM_MA_TYPE
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{
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SMA,
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EMA,
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SMMA,
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LWMA
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};
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//+==================================================================+
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class CMovingAverageCalculator
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{
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protected:
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int m_period;
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ENUM_MA_TYPE m_ma_type;
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double m_price[];
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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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CMovingAverageCalculator(void) {};
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virtual ~CMovingAverageCalculator(void) {};
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bool Init(int period, ENUM_MA_TYPE ma_type);
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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[], double &ma_buffer[]);
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};
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//--- Derived class for Heikin Ashi version ---
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class CMovingAverageCalculator_HA : public CMovingAverageCalculator
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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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//| METHOD IMPLEMENTATIONS |
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//+==================================================================+
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//+------------------------------------------------------------------+
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//| |
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//+------------------------------------------------------------------+
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bool CMovingAverageCalculator::Init(int period, ENUM_MA_TYPE ma_type)
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{
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m_period = (period < 1) ? 1 : period;
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m_ma_type = ma_type;
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return true;
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}
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//+------------------------------------------------------------------+
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//| |
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//+------------------------------------------------------------------+
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void CMovingAverageCalculator::Calculate(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[], double &ma_buffer[])
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{
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if(rates_total < m_period)
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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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int start_pos = m_period - 1;
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for(int i = start_pos; i < rates_total; i++)
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{
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switch(m_ma_type)
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{
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case EMA:
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case SMMA:
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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_period; j++)
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sum+=m_price[i-j];
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ma_buffer[i]=sum/m_period;
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}
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else
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{
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if(m_ma_type==EMA)
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{
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double pr=2.0/(m_period+1.0);
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ma_buffer[i]=m_price[i]*pr+ma_buffer[i-1]*(1.0-pr);
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}
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else
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ma_buffer[i]=(ma_buffer[i-1]*(m_period-1)+m_price[i])/m_period;
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}
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break;
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case LWMA:
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{
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double sum=0, w_sum=0;
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for(int j=0; j<m_period; j++)
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{
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int w=m_period-j;
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sum+=m_price[i-j]*w;
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w_sum+=w;
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}
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if(w_sum>0)
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ma_buffer[i]=sum/w_sum;
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}
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break;
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default: // SMA
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{
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double sum=0;
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for(int j=0; j<m_period; j++)
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sum+=m_price[i-j];
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ma_buffer[i]=sum/m_period;
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}
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break;
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}
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}
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}
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//+------------------------------------------------------------------+
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//| |
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//+------------------------------------------------------------------+
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bool CMovingAverageCalculator::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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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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//| |
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//+------------------------------------------------------------------+
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bool CMovingAverageCalculator_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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//--- Corrected: The HA version now uses the selected price type from the HA candles
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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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