From 81989d6cfc493e380a5203950c173b7fd6fcf18b Mon Sep 17 00:00:00 2001
From: Toh4iem9 <Toh4iem9@forge.mql5.io>
Date: Tue, 30 Sep 2025 09:33:16 +0200
Subject: [PATCH] new files added

---
 Include/MyIncludes/Holt_Calculator.mqh | 182 +++++++++++++++++++++++++
 1 file changed, 182 insertions(+)
 create mode 100644 Include/MyIncludes/Holt_Calculator.mqh

diff --git a/Include/MyIncludes/Holt_Calculator.mqh b/Include/MyIncludes/Holt_Calculator.mqh
new file mode 100644
index 0000000..5023c5d
--- /dev/null
+++ b/Include/MyIncludes/Holt_Calculator.mqh
@@ -0,0 +1,182 @@
+//+------------------------------------------------------------------+
+//|                                             Holt_Calculator.mqh  |
+//|      Calculation engines for Standard and Heikin Ashi Holt Models|
+//|                                        Copyright 2025, xxxxxxxx  |
+//+------------------------------------------------------------------+
+#property copyright "Copyright 2025, xxxxxxxx"
+
+#include <MyIncludes\HeikinAshi_Tools.mqh>
+
+//+==================================================================+
+//|                                                                  |
+//|             CLASS 1: CHoltMACalculator (Base Class)              |
+//|                                                                  |
+//+==================================================================+
+class CHoltMACalculator
+  {
+protected:
+   int               m_period;
+   double            m_alpha;
+   double            m_beta;
+   int               m_forecast_period;
+
+   double            m_price[];
+
+   virtual bool      PreparePriceSeries(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[]);
+
+public:
+                     CHoltMACalculator(void);
+   virtual          ~CHoltMACalculator(void) {};
+
+   bool              Init(int period, double alpha, double beta, int forecast_p);
+   void              Calculate(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[],
+                               double &forecast_out[], double &upper_band_out[], double &lower_band_out[]);
+  };
+
+//+------------------------------------------------------------------+
+//| CHoltMACalculator: Constructor                                   |
+//+------------------------------------------------------------------+
+CHoltMACalculator::CHoltMACalculator(void) : m_period(0), m_alpha(0.1), m_beta(0.05), m_forecast_period(5)
+  {
+  }
+
+//+------------------------------------------------------------------+
+//| CHoltMACalculator: Initialization                                |
+//+------------------------------------------------------------------+
+bool CHoltMACalculator::Init(int period, double alpha, double beta, int forecast_p)
+  {
+   m_period          = (period < 2) ? 2 : period;
+   m_alpha           = (alpha <= 0) ? 0.0001 : (alpha >= 1) ? 0.9999 : alpha;
+   m_beta            = (beta <= 0) ? 0.0001 : (beta >= 1) ? 0.9999 : beta;
+   m_forecast_period = (forecast_p < 1) ? 1 : forecast_p;
+   return true;
+  }
+
+//+------------------------------------------------------------------+
+//| CHoltMACalculator: Main Calculation Method                       |
+//+------------------------------------------------------------------+
+void CHoltMACalculator::Calculate(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[],
+                                  double &forecast_out[], double &upper_band_out[], double &lower_band_out[])
+  {
+   if(rates_total < m_period)
+      return;
+
+   ArrayResize(m_price, rates_total);
+   if(!PreparePriceSeries(rates_total, price_type, open, high, low, close))
+      return;
+
+   double level[], trend[];
+   ArrayResize(level, rates_total);
+   ArrayResize(trend, rates_total);
+
+   level[0] = m_price[0];
+   trend[0] = m_price[1] - m_price[0];
+   forecast_out[0] = level[0] + trend[0];
+   level[1] = m_price[1];
+   trend[1] = m_beta * (level[1] - level[0]) + (1 - m_beta) * trend[0];
+   forecast_out[1] = level[1] + trend[1];
+
+   for(int i = 2; i < rates_total; i++)
+     {
+      //--- Step 1: Calculate Level, Trend, and 1-period Forecast (MA Line)
+      level[i] = m_alpha * m_price[i] + (1 - m_alpha) * (level[i-1] + trend[i-1]);
+      trend[i] = m_beta * (level[i] - level[i-1]) + (1 - m_beta) * trend[i-1];
+      forecast_out[i] = level[i] + trend[i];
+
+      //--- Step 2: Calculate multi-period forecast for the channel bands
+      upper_band_out[i] = level[i] + m_forecast_period * trend[i];
+      lower_band_out[i] = level[i] - m_forecast_period * trend[i];
+     }
+  }
+
+//+------------------------------------------------------------------+
+//| CHoltMACalculator: Prepares the standard source price series.    |
+//+------------------------------------------------------------------+
+bool CHoltMACalculator::PreparePriceSeries(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[])
+  {
+   switch(price_type)
+     {
+      case PRICE_OPEN:
+         ArrayCopy(m_price, open, 0, 0, rates_total);
+         break;
+      case PRICE_HIGH:
+         ArrayCopy(m_price, high, 0, 0, rates_total);
+         break;
+      case PRICE_LOW:
+         ArrayCopy(m_price, low, 0, 0, rates_total);
+         break;
+      case PRICE_MEDIAN:
+         for(int i=0; i<rates_total; i++)
+            m_price[i] = (high[i]+low[i])/2.0;
+         break;
+      case PRICE_TYPICAL:
+         for(int i=0; i<rates_total; i++)
+            m_price[i] = (high[i]+low[i]+close[i])/3.0;
+         break;
+      case PRICE_WEIGHTED:
+         for(int i=0; i<rates_total; i++)
+            m_price[i] = (high[i]+low[i]+2*close[i])/4.0;
+         break;
+      default:
+         ArrayCopy(m_price, close, 0, 0, rates_total);
+         break;
+     }
+   return true;
+  }
+
+//+==================================================================+
+//|                                                                  |
+//|             CLASS 2: CHoltMACalculator_HA (Heikin Ashi)          |
+//|                                                                  |
+//+==================================================================+
+class CHoltMACalculator_HA : public CHoltMACalculator
+  {
+private:
+   CHeikinAshi_Calculator m_ha_calculator;
+protected:
+   virtual bool      PreparePriceSeries(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[]) override;
+  };
+
+//+------------------------------------------------------------------+
+//| CHoltMACalculator_HA: Prepares the Heikin Ashi source price.     |
+//+------------------------------------------------------------------+
+bool CHoltMACalculator_HA::PreparePriceSeries(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[])
+  {
+   double ha_open[], ha_high[], ha_low[], ha_close[];
+   ArrayResize(ha_open, rates_total);
+   ArrayResize(ha_high, rates_total);
+   ArrayResize(ha_low, rates_total);
+   ArrayResize(ha_close, rates_total);
+   m_ha_calculator.Calculate(rates_total, open, high, low, close, ha_open, ha_high, ha_low, ha_close);
+
+   switch(price_type)
+     {
+      case PRICE_OPEN:
+         ArrayCopy(m_price, ha_open, 0, 0, rates_total);
+         break;
+      case PRICE_HIGH:
+         ArrayCopy(m_price, ha_high, 0, 0, rates_total);
+         break;
+      case PRICE_LOW:
+         ArrayCopy(m_price, ha_low, 0, 0, rates_total);
+         break;
+      case PRICE_MEDIAN:
+         for(int i=0; i<rates_total; i++)
+            m_price[i] = (ha_high[i]+ha_low[i])/2.0;
+         break;
+      case PRICE_TYPICAL:
+         for(int i=0; i<rates_total; i++)
+            m_price[i] = (ha_high[i]+ha_low[i]+ha_close[i])/3.0;
+         break;
+      case PRICE_WEIGHTED:
+         for(int i=0; i<rates_total; i++)
+            m_price[i] = (ha_high[i]+ha_low[i]+2*ha_close[i])/4.0;
+         break;
+      default:
+         ArrayCopy(m_price, ha_close, 0, 0, rates_total);
+         break;
+     }
+   return true;
+  }
+//+------------------------------------------------------------------+
+//+------------------------------------------------------------------+