From 1a7fa65db166467e153cba6463dcf20fa284231c Mon Sep 17 00:00:00 2001
From: Toh4iem9 <Toh4iem9@forge.mql5.io>
Date: Tue, 30 Sep 2025 10:12:49 +0200
Subject: [PATCH] new files added

---
 Include/MyIncludes/Holt_Engine.mqh | 175 +++++++++++++++++++++++++++++
 1 file changed, 175 insertions(+)
 create mode 100644 Include/MyIncludes/Holt_Engine.mqh

diff --git a/Include/MyIncludes/Holt_Engine.mqh b/Include/MyIncludes/Holt_Engine.mqh
new file mode 100644
index 0000000..5c4e2ec
--- /dev/null
+++ b/Include/MyIncludes/Holt_Engine.mqh
@@ -0,0 +1,175 @@
+//+------------------------------------------------------------------+
+//|                                                 Holt_Engine.mqh  |
+//|        Core calculation engine for all Holt-based indicators.    |
+//|                                        Copyright 2025, xxxxxxxx  |
+//+------------------------------------------------------------------+
+#property copyright "Copyright 2025, xxxxxxxx"
+
+#include <MyIncludes\HeikinAshi_Tools.mqh>
+
+//+==================================================================+
+//|                                                                  |
+//|             CLASS 1: CHoltEngine (Base Class)                    |
+//|                                                                  |
+//+==================================================================+
+class CHoltEngine
+  {
+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:
+                     CHoltEngine(void);
+   virtual          ~CHoltEngine(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 &trend_out[], double &level_out[], double &upper_band_out[], double &lower_band_out[]);
+  };
+
+//+------------------------------------------------------------------+
+//| CHoltEngine: Constructor                                         |
+//+------------------------------------------------------------------+
+CHoltEngine::CHoltEngine(void) : m_period(0), m_alpha(0.1), m_beta(0.05), m_forecast_period(5)
+  {
+  }
+
+//+------------------------------------------------------------------+
+//| CHoltEngine: Initialization                                      |
+//+------------------------------------------------------------------+
+bool CHoltEngine::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;
+  }
+
+//+------------------------------------------------------------------+
+//| CHoltEngine: Main Calculation Method                             |
+//+------------------------------------------------------------------+
+void CHoltEngine::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 &trend_out[], double &level_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;
+
+   level_out[0] = m_price[0];
+   trend_out[0] = m_price[1] - m_price[0];
+   forecast_out[0] = level_out[0] + trend_out[0];
+   level_out[1] = m_price[1];
+   trend_out[1] = m_beta * (level_out[1] - level_out[0]) + (1 - m_beta) * trend_out[0];
+   forecast_out[1] = level_out[1] + trend_out[1];
+
+   for(int i = 2; i < rates_total; i++)
+     {
+      level_out[i] = m_alpha * m_price[i] + (1 - m_alpha) * (level_out[i-1] + trend_out[i-1]);
+      trend_out[i] = m_beta * (level_out[i] - level_out[i-1]) + (1 - m_beta) * trend_out[i-1];
+      forecast_out[i] = level_out[i] + trend_out[i];
+      upper_band_out[i] = level_out[i] + m_forecast_period * trend_out[i];
+      lower_band_out[i] = level_out[i] - m_forecast_period * trend_out[i];
+     }
+  }
+
+//+------------------------------------------------------------------+
+//| CHoltEngine: Prepares the standard source price series.          |
+//+------------------------------------------------------------------+
+bool CHoltEngine::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: CHoltEngine_HA (Heikin Ashi)                |
+//|                                                                  |
+//+==================================================================+
+class CHoltEngine_HA : public CHoltEngine
+  {
+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;
+  };
+
+//+------------------------------------------------------------------+
+//| CHoltEngine_HA: Prepares the Heikin Ashi source price.           |
+//+------------------------------------------------------------------+
+bool CHoltEngine_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;
+  }
+//+------------------------------------------------------------------+
+//+------------------------------------------------------------------+