diff --git a/Include/MyIncludes/StochasticFast_Calculator.mqh b/Include/MyIncludes/StochasticFast_Calculator.mqh
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+//+------------------------------------------------------------------+
+//|                                     StochasticFast_Calculator.mqh|
+//| Calculation engine for Standard and Heikin Ashi Fast Stochastic. |
+//|                                        Copyright 2025, xxxxxxxx  |
+//+------------------------------------------------------------------+
+#property copyright "Copyright 2025, xxxxxxxx"
+
+#include <MyIncludes\HeikinAshi_Tools.mqh>
+
+//+==================================================================+
+//|                                                                  |
+//|           CLASS 1: CStochasticFastCalculator (Base Class)        |
+//|                                                                  |
+//+==================================================================+
+class CStochasticFastCalculator
+  {
+protected:
+   int               m_k_period, m_d_period;
+   ENUM_MA_METHOD    m_d_ma_type;
+   double            m_src_high[], m_src_low[], m_src_close[];
+
+   double            Highest(int period, int current_pos);
+   double            Lowest(int period, int current_pos);
+
+   virtual bool      PrepareSourceData(int rates_total, const double &open[], const double &high[], const double &low[], const double &close[]);
+
+public:
+                     CStochasticFastCalculator(void) {};
+   virtual          ~CStochasticFastCalculator(void) {};
+
+   bool              Init(int k_p, int d_p, ENUM_MA_METHOD d_ma);
+   void              Calculate(int rates_total, const double &open[], const double &high[], const double &low[], const double &close[],
+                               double &k_buffer[], double &d_buffer[]);
+  };
+
+//+------------------------------------------------------------------+
+//| CStochasticFastCalculator: Initialization                        |
+//+------------------------------------------------------------------+
+bool CStochasticFastCalculator::Init(int k_p, int d_p, ENUM_MA_METHOD d_ma)
+  {
+   m_k_period  = (k_p < 1) ? 1 : k_p;
+   m_d_period  = (d_p < 1) ? 1 : d_p;
+   m_d_ma_type = d_ma;
+   return true;
+  }
+
+//+------------------------------------------------------------------+
+//| CStochasticFastCalculator: Main Calculation Method (Shared Logic)|
+//+------------------------------------------------------------------+
+void CStochasticFastCalculator::Calculate(int rates_total, const double &open[], const double &high[], const double &low[], const double &close[],
+      double &k_buffer[], double &d_buffer[])
+  {
+   if(rates_total <= m_k_period + m_d_period)
+      return;
+   if(!PrepareSourceData(rates_total, open, high, low, close))
+      return;
+
+//--- STEP 1: Calculate %K (Fast %K)
+   for(int i = m_k_period - 1; i < rates_total; i++)
+     {
+      double highest_h = Highest(m_k_period, i);
+      double lowest_l  = Lowest(m_k_period, i);
+      double range = highest_h - lowest_l;
+      if(range > 0)
+         k_buffer[i] = (m_src_close[i] - lowest_l) / range * 100.0;
+      else
+         k_buffer[i] = (i > 0) ? k_buffer[i-1] : 50.0;
+     }
+
+//--- STEP 2: Calculate %D (Signal Line) by smoothing %K
+   int d_start = m_k_period + m_d_period - 2;
+   for(int i = d_start; i < rates_total; i++)
+     {
+      switch(m_d_ma_type)
+        {
+         case MODE_EMA:
+         case MODE_SMMA:
+            if(i == d_start)
+              {
+               double sum=0;
+               for(int j=0; j<m_d_period; j++)
+                  sum+=k_buffer[i-j];
+               d_buffer[i]=sum/m_d_period;
+              }
+            else
+              {
+               if(m_d_ma_type==MODE_EMA)
+                 {
+                  double pr=2.0/(m_d_period+1.0);
+                  d_buffer[i]=k_buffer[i]*pr+d_buffer[i-1]*(1.0-pr);
+                 }
+               else
+                  d_buffer[i]=(d_buffer[i-1]*(m_d_period-1)+k_buffer[i])/m_d_period;
+              }
+            break;
+         case MODE_LWMA:
+           {double sum=0,w_sum=0; for(int j=0; j<m_d_period; j++) {int w=m_d_period-j; sum+=k_buffer[i-j]*w; w_sum+=w;} if(w_sum>0) d_buffer[i]=sum/w_sum;}
+         break;
+         default:
+           {double sum=0; for(int j=0; j<m_d_period; j++) sum+=k_buffer[i-j]; d_buffer[i]=sum/m_d_period;}
+         break;
+        }
+     }
+  }
+
+//+------------------------------------------------------------------+
+//| CStochasticFastCalculator: Prepares the standard source data.    |
+//+------------------------------------------------------------------+
+bool CStochasticFastCalculator::PrepareSourceData(int rates_total, const double &open[], const double &high[], const double &low[], const double &close[])
+  {
+   ArrayResize(m_src_high, rates_total);
+   ArrayCopy(m_src_high, high, 0, 0, rates_total);
+   ArrayResize(m_src_low, rates_total);
+   ArrayCopy(m_src_low, low, 0, 0, rates_total);
+   ArrayResize(m_src_close, rates_total);
+   ArrayCopy(m_src_close, close, 0, 0, rates_total);
+   return true;
+  }
+
+//+------------------------------------------------------------------+
+//| Finds the highest value in the internal price buffer.            |
+//+------------------------------------------------------------------+
+double CStochasticFastCalculator::Highest(int period, int current_pos)
+  {
+   double res = m_src_high[current_pos];
+   for(int i = 1; i < period; i++)
+     {
+      int index = current_pos - i;
+      if(index < 0)
+         break;
+      if(res < m_src_high[index])
+         res = m_src_high[index];
+     }
+   return(res);
+  }
+
+//+------------------------------------------------------------------+
+//| Finds the lowest value in the internal price buffer.             |
+//+------------------------------------------------------------------+
+double CStochasticFastCalculator::Lowest(int period, int current_pos)
+  {
+   double res = m_src_low[current_pos];
+   for(int i = 1; i < period; i++)
+     {
+      int index = current_pos - i;
+      if(index < 0)
+         break;
+      if(res > m_src_low[index])
+         res = m_src_low[index];
+     }
+   return(res);
+  }
+
+//+==================================================================+
+//|                                                                  |
+//|         CLASS 2: CStochasticFastCalculator_HA (Heikin Ashi)      |
+//|                                                                  |
+//+==================================================================+
+class CStochasticFastCalculator_HA : public CStochasticFastCalculator
+  {
+private:
+   CHeikinAshi_Calculator m_ha_calculator;
+protected:
+   virtual bool      PrepareSourceData(int rates_total, const double &open[], const double &high[], const double &low[], const double &close[]) override;
+  };
+
+//+------------------------------------------------------------------+
+//| CStochasticFastCalculator_HA: Prepares the HA source data.       |
+//+------------------------------------------------------------------+
+bool CStochasticFastCalculator_HA::PrepareSourceData(int rates_total, const double &open[], const double &high[], const double &low[], const double &close[])
+  {
+   double ha_open[];
+   ArrayResize(ha_open, rates_total);
+   ArrayResize(m_src_high, rates_total);
+   ArrayResize(m_src_low, rates_total);
+   ArrayResize(m_src_close, rates_total);
+   m_ha_calculator.Calculate(rates_total, open, high, low, close, ha_open, m_src_high, m_src_low, m_src_close);
+   return true;
+  }
+//+------------------------------------------------------------------+
+//+------------------------------------------------------------------+