diff --git a/Include/MyIncludes/Butterworth_Slope_Calculator.mqh b/Include/MyIncludes/Butterworth_Slope_Calculator.mqh
new file mode 100644
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+++ b/Include/MyIncludes/Butterworth_Slope_Calculator.mqh
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+//+------------------------------------------------------------------+
+//|                                   Butterworth_Slope_Calculator.mqh |
+//|                                          Copyright 2026, xxxxxxxx|
+//+------------------------------------------------------------------+
+#property copyright "Copyright 2026, xxxxxxxx"
+#property version   "1.00" // Performance optimized first derivative of Butterworth Filter
+#property description "Calculator engine for analyzing the slope (1st derivative) of Butterworth Filter."
+
+#ifndef BUTTERWORTH_SLOPE_CALCULATOR_MQH
+#define BUTTERWORTH_SLOPE_CALCULATOR_MQH
+
+#include <MyIncludes\Butterworth_Calculator.mqh>
+
+//+==================================================================+
+//|             CLASS: CButterworthSlopeCalculator                   |
+//+==================================================================+
+class CButterworthSlopeCalculator
+  {
+private:
+   CButterworthCalculator *m_filter_calc;
+   double                  m_filter_buffer[];
+
+public:
+                     CButterworthSlopeCalculator(void);
+                    ~CButterworthSlopeCalculator(void);
+
+   bool                    Init(int period, ENUM_BUTTERWORTH_POLES poles, bool is_ha);
+   void                    Calculate(int rates_total, int prev_calculated, ENUM_APPLIED_PRICE price_type,
+                                     const double &open[], const double &high[], const double &low[], const double &close[],
+                                     double &slope_buffer[], double &color_buffer[], double threshold);
+  };
+
+//+------------------------------------------------------------------+
+//| Constructor                                                      |
+//+------------------------------------------------------------------+
+CButterworthSlopeCalculator::CButterworthSlopeCalculator(void)
+   : m_filter_calc(NULL)
+  {
+  }
+
+//+------------------------------------------------------------------+
+//| Destructor                                                       |
+//+------------------------------------------------------------------+
+CButterworthSlopeCalculator::~CButterworthSlopeCalculator(void)
+  {
+   if(CheckPointer(m_filter_calc) != POINTER_INVALID)
+      delete m_filter_calc;
+  }
+
+//+------------------------------------------------------------------+
+//| Init                                                             |
+//+------------------------------------------------------------------+
+bool CButterworthSlopeCalculator::Init(int period, ENUM_BUTTERWORTH_POLES poles, bool is_ha)
+  {
+   if(CheckPointer(m_filter_calc) != POINTER_INVALID)
+      delete m_filter_calc;
+
+   if(is_ha)
+      m_filter_calc = new CButterworthCalculator_HA();
+   else
+      m_filter_calc = new CButterworthCalculator();
+
+   if(CheckPointer(m_filter_calc) == POINTER_INVALID)
+      return false;
+
+   return m_filter_calc.Init(period, poles, SOURCE_PRICE);
+  }
+
+//+------------------------------------------------------------------+
+//| Calculate                                                        |
+//+------------------------------------------------------------------+
+void CButterworthSlopeCalculator::Calculate(int rates_total, int prev_calculated, ENUM_APPLIED_PRICE price_type,
+      const double &open[], const double &high[], const double &low[], const double &close[],
+      double &slope_buffer[], double &color_buffer[], double threshold)
+  {
+   if(CheckPointer(m_filter_calc) == POINTER_INVALID || rates_total < 5)
+      return;
+
+//--- Resize state buffers and enforce chronological safety
+   if(ArraySize(m_filter_buffer) != rates_total)
+     {
+      ArrayResize(m_filter_buffer, rates_total);
+      ArraySetAsSeries(m_filter_buffer, false);
+     }
+
+//--- Calculate underlying Butterworth filter
+   m_filter_calc.Calculate(rates_total, prev_calculated, price_type, open, high, low, close, m_filter_buffer);
+
+   int start_index = (prev_calculated > 0) ? prev_calculated - 1 : 0;
+
+   if(start_index == 0)
+     {
+      slope_buffer[0] = 0.0;
+      color_buffer[0] = 0.0; // Index 0: clrGray
+      start_index = 1;
+     }
+
+//--- Slope calculation loop: Slope = Filter[t] - Filter[t-1]
+   for(int i = start_index; i < rates_total; i++)
+     {
+      slope_buffer[i] = m_filter_buffer[i] - m_filter_buffer[i - 1];
+
+      double current_slope  = slope_buffer[i];
+      double previous_slope = slope_buffer[i - 1];
+
+      //--- Symmetrical 5-Zone Momentum Matrix
+      if(MathAbs(current_slope) <= threshold)
+        {
+         color_buffer[i] = 0.0; // Index 0: clrGray (Neutral / Consolidation)
+        }
+      else
+         if(current_slope > 0.0)
+           {
+            if(current_slope > previous_slope)
+               color_buffer[i] = 1.0; // Index 1: clrMediumSeaGreen (Strong Bullish Acceleration)
+            else
+               color_buffer[i] = 2.0; // Index 2: clrPaleGreen (Weak Bullish Deceleration)
+           }
+         else // current_slope < 0.0
+           {
+            if(current_slope < previous_slope)
+               color_buffer[i] = 3.0; // Index 3: clrCrimson (Strong Bearish Acceleration)
+            else
+               color_buffer[i] = 4.0; // Index 4: clrLightCoral (Weak Bearish Deceleration)
+           }
+     }
+  }
+
+#endif // BUTTERWORTH_SLOPE_CALCULATOR_MQH
+//+------------------------------------------------------------------+