From 08f40d0541180cd8059bd7d7008595e905e1e77d Mon Sep 17 00:00:00 2001
From: Toh4iem9 <Toh4iem9@forge.mql5.io>
Date: Fri, 31 Oct 2025 14:02:22 +0100
Subject: [PATCH] new files added

---
 .../MyIncludes/Gaussian_Bands_Calculator.mqh  | 186 ++++++++++++++++++
 1 file changed, 186 insertions(+)
 create mode 100644 Include/MyIncludes/Gaussian_Bands_Calculator.mqh

diff --git a/Include/MyIncludes/Gaussian_Bands_Calculator.mqh b/Include/MyIncludes/Gaussian_Bands_Calculator.mqh
new file mode 100644
index 0000000..a322c3b
--- /dev/null
+++ b/Include/MyIncludes/Gaussian_Bands_Calculator.mqh
@@ -0,0 +1,186 @@
+//+------------------------------------------------------------------+
+//|                                  Gaussian_Bands_Calculator.mqh   |
+//|      Calculation engine for Bollinger-style bands using a        |
+//|      Gaussian Filter as the centerline.                          |
+//|                                        Copyright 2025, xxxxxxxx  |
+//+------------------------------------------------------------------+
+#property copyright "Copyright 2025, xxxxxxxx"
+
+#include <MyIncludes\Gaussian_Filter_Calculator.mqh>
+
+//+==================================================================+
+class CGaussianBandsCalculator
+  {
+protected:
+   CGaussianFilterCalculator *m_calc_center;
+   int               m_period;
+   double            m_multiplier;
+   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:
+                     CGaussianBandsCalculator(void);
+   virtual          ~CGaussianBandsCalculator(void);
+
+   bool              Init(int period, double multiplier);
+   void              Calculate(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[],
+                               double &upper_buffer[], double &lower_buffer[], double &middle_buffer[]);
+  };
+
+//+------------------------------------------------------------------+
+CGaussianBandsCalculator::CGaussianBandsCalculator(void)
+  {
+   m_calc_center = NULL;
+  }
+//+------------------------------------------------------------------+
+CGaussianBandsCalculator::~CGaussianBandsCalculator(void)
+  {
+   if(CheckPointer(m_calc_center) != POINTER_INVALID)
+      delete m_calc_center;
+  }
+//+------------------------------------------------------------------+
+bool CGaussianBandsCalculator::Init(int period, double multiplier)
+  {
+   m_period = (period < 2) ? 2 : period;
+   m_multiplier = multiplier;
+
+   if(CheckPointer(m_calc_center) == POINTER_INVALID)
+      m_calc_center = new CGaussianFilterCalculator();
+
+   if(CheckPointer(m_calc_center) == POINTER_INVALID)
+      return false;
+
+   return(m_calc_center.Init(m_period, SOURCE_PRICE));
+  }
+
+//+------------------------------------------------------------------+
+void CGaussianBandsCalculator::Calculate(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[],
+      double &upper_buffer[], double &lower_buffer[], double &middle_buffer[])
+  {
+   if(rates_total < m_period)
+      return;
+   if(!PreparePriceSeries(rates_total, price_type, open, high, low, close))
+      return;
+
+// --- Step 1: Calculate Centerline using Gaussian Filter ---
+   m_calc_center.Calculate(rates_total, price_type, open, high, low, close, middle_buffer);
+
+// --- Step 2: Calculate Standard Deviation ---
+   for(int i = m_period - 1; i < rates_total; i++)
+     {
+      double sum_sq = 0;
+      for(int j = 0; j < m_period; j++)
+        {
+         double diff = m_price[i-j] - middle_buffer[i-j];
+         sum_sq += diff * diff;
+        }
+
+      double std_dev = sqrt(sum_sq / m_period);
+
+      // --- Step 3: Calculate Upper and Lower Bands ---
+      if(middle_buffer[i] != EMPTY_VALUE)
+        {
+         upper_buffer[i] = middle_buffer[i] + m_multiplier * std_dev;
+         lower_buffer[i] = middle_buffer[i] - m_multiplier * std_dev;
+        }
+     }
+  }
+
+//+------------------------------------------------------------------+
+bool CGaussianBandsCalculator::PreparePriceSeries(int rates_total, ENUM_APPLIED_PRICE price_type, const double &open[], const double &high[], const double &low[], const double &close[])
+  {
+   ArrayResize(m_price, rates_total);
+// For StdDev, we use the same price source as the filter itself
+   switch(price_type)
+     {
+      case PRICE_CLOSE:
+         ArrayCopy(m_price, close, 0, 0, rates_total);
+         break;
+      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]+close[i]+close[i])/4.0;
+         break;
+      default:
+         return false;
+     }
+   return true;
+  }
+
+//+==================================================================+
+class CGaussianBandsCalculator_HA : public CGaussianBandsCalculator
+  {
+private:
+   CHeikinAshi_Calculator m_ha_calculator;
+public:
+                     CGaussianBandsCalculator_HA(void)
+     {
+      if(CheckPointer(m_calc_center) != POINTER_INVALID)
+         delete m_calc_center;
+      m_calc_center = new CGaussianFilterCalculator_HA();
+     }
+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;
+  };
+
+//+------------------------------------------------------------------+
+bool CGaussianBandsCalculator_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);
+
+   ArrayResize(m_price, rates_total);
+   switch(price_type)
+     {
+      case PRICE_CLOSE:
+         ArrayCopy(m_price, ha_close, 0, 0, rates_total);
+         break;
+      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]+ha_close[i]+ha_close[i])/4.0;
+         break;
+      default:
+         return false;
+     }
+   return true;
+  }
+//+------------------------------------------------------------------+
+//+------------------------------------------------------------------+