diff --git a/Indicators/MyIndicators/VIDYA_TrendActivity_Pro.mq5 b/Indicators/MyIndicators/VIDYA_TrendActivity_Pro.mq5
new file mode 100644
index 0000000..2ea1882
--- /dev/null
+++ b/Indicators/MyIndicators/VIDYA_TrendActivity_Pro.mq5
@@ -0,0 +1,122 @@
+//+------------------------------------------------------------------+
+//|                                        VIDYA_TrendActivity_Pro.mq5|
+//|                                          Copyright 2025, xxxxxxxx|
+//|                                                                  |
+//+------------------------------------------------------------------+
+#property copyright "Copyright 2025, xxxxxxxx"
+#property version   "5.01" // Corrected include paths and enum definitions
+#property description "Measures the trend activity of a VIDYA line with selectable"
+#property description "price and ATR sources (Standard or Heikin Ashi)."
+
+//--- Indicator Window and Plot Properties ---
+#property indicator_separate_window
+#property indicator_buffers 1
+#property indicator_plots   1
+#property indicator_type1   DRAW_HISTOGRAM
+#property indicator_color1  clrDodgerBlue
+#property indicator_width1  2
+#property indicator_label1  "Activity"
+#property indicator_minimum 0.0
+#property indicator_maximum 0.5
+
+//--- Include the calculator engine ---
+#include <MyIncludes\VIDYA_TrendActivity_Calculator.mqh>
+
+//--- Custom Enum for Price Source, including Heikin Ashi ---
+enum ENUM_APPLIED_PRICE_HA_ALL
+  {
+//--- Heikin Ashi Prices (negative values for easy identification)
+   PRICE_HA_CLOSE    = -1,
+   PRICE_HA_OPEN     = -2,
+   PRICE_HA_HIGH     = -3,
+   PRICE_HA_LOW      = -4,
+   PRICE_HA_MEDIAN   = -5,
+   PRICE_HA_TYPICAL  = -6,
+   PRICE_HA_WEIGHTED = -7,
+//--- Standard Prices (using built-in ENUM_APPLIED_PRICE values)
+   PRICE_CLOSE_STD   = PRICE_CLOSE,
+   PRICE_OPEN_STD    = PRICE_OPEN,
+   PRICE_HIGH_STD    = PRICE_HIGH,
+   PRICE_LOW_STD     = PRICE_LOW,
+   PRICE_MEDIAN_STD  = PRICE_MEDIAN,
+   PRICE_TYPICAL_STD = PRICE_TYPICAL,
+   PRICE_WEIGHTED_STD= PRICE_WEIGHTED
+  };
+
+//--- Input Parameters ---
+input group                     "VIDYA Settings"
+input int                       InpPeriodCMO    = 9;
+input int                       InpPeriodEMA    = 12;
+input ENUM_APPLIED_PRICE_HA_ALL InpSourcePrice  = PRICE_CLOSE_STD;
+input group                     "Activity Calculation Settings"
+input int                       InpAtrPeriod    = 14;
+input ENUM_ATR_SOURCE           InpAtrSource    = ATR_SOURCE_STANDARD;
+input int                       InpSmoothingPeriod = 5;
+
+//--- Indicator Buffers ---
+double    BufferActivity[];
+
+//--- Global calculator object (as a base class pointer) ---
+CVIDYATrendActivityCalculator *g_calculator;
+
+//+------------------------------------------------------------------+
+//| Custom indicator initialization function.                        |
+//+------------------------------------------------------------------+
+int OnInit()
+  {
+   SetIndexBuffer(0, BufferActivity, INDICATOR_DATA);
+   ArraySetAsSeries(BufferActivity, false);
+
+   if(InpSourcePrice <= PRICE_HA_CLOSE)
+     {
+      g_calculator = new CVIDYATrendActivityCalculator_HA();
+      IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("VIDYA Activity HA(%d)", InpPeriodCMO));
+     }
+   else
+     {
+      g_calculator = new CVIDYATrendActivityCalculator();
+      IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("VIDYA Activity(%d)", InpPeriodCMO));
+     }
+
+   if(CheckPointer(g_calculator) == POINTER_INVALID || !g_calculator.Init(InpPeriodCMO, InpPeriodEMA, InpAtrPeriod, InpAtrSource, InpSmoothingPeriod))
+     {
+      Print("Failed to create or initialize VIDYA Trend Activity Calculator object.");
+      return(INIT_FAILED);
+     }
+
+   int draw_begin = InpPeriodCMO + InpPeriodEMA + InpAtrPeriod + InpSmoothingPeriod;
+   PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, draw_begin);
+   IndicatorSetInteger(INDICATOR_DIGITS, 4);
+
+   return(INIT_SUCCEEDED);
+  }
+
+//+------------------------------------------------------------------+
+//| Custom indicator deinitialization function.                      |
+//+------------------------------------------------------------------+
+void OnDeinit(const int reason)
+  {
+   if(CheckPointer(g_calculator) != POINTER_INVALID)
+      delete g_calculator;
+  }
+
+//+------------------------------------------------------------------+
+//| Custom indicator calculation function.                           |
+//+------------------------------------------------------------------+
+int OnCalculate(const int rates_total, const int, const datetime&[], const double &open[], const double &high[], const double &low[], const double &close[], const long&[], const long&[], const int&[])
+  {
+   if(CheckPointer(g_calculator) == POINTER_INVALID)
+      return 0;
+
+   ENUM_APPLIED_PRICE price_type;
+   if(InpSourcePrice <= PRICE_HA_CLOSE)
+      price_type = (ENUM_APPLIED_PRICE)(-(int)InpSourcePrice);
+   else
+      price_type = (ENUM_APPLIED_PRICE)InpSourcePrice;
+
+   g_calculator.Calculate(rates_total, price_type, open, high, low, close, BufferActivity);
+
+   return(rates_total);
+  }
+//+------------------------------------------------------------------+
+//+------------------------------------------------------------------+