diff --git a/Indicators/MyIndicators/Holt_Oscillator_HeikinAshi.mq5 b/Indicators/MyIndicators/Holt_Oscillator_HeikinAshi.mq5
new file mode 100644
index 0000000..29cee5c
--- /dev/null
+++ b/Indicators/MyIndicators/Holt_Oscillator_HeikinAshi.mq5
@@ -0,0 +1,79 @@
+//+------------------------------------------------------------------+
+//|                                 Holt_Oscillator_HeikinAshi.mq5   |
+//|                                          Copyright 2025, xxxxxxxx|
+//+------------------------------------------------------------------+
+#property copyright "Copyright 2025, xxxxxxxx"
+#property version   "1.00"
+#property description "Holt's Trend Oscillator on Heikin Ashi data."
+
+#property indicator_separate_window
+#property indicator_buffers 1
+#property indicator_plots   1
+#property indicator_level1 0.0
+#property indicator_levelstyle STYLE_DOT
+#property indicator_levelcolor clrGray
+
+#include <MyIncludes\Holt_Calculator.mqh>
+
+//--- Plot 1: Holt Trend Oscillator
+#property indicator_label1  "Holt Trend (HA)"
+#property indicator_type1   DRAW_HISTOGRAM
+#property indicator_color1  clrSeaGreen, clrTomato
+#property indicator_style1  STYLE_SOLID
+#property indicator_width1  2
+
+//--- Input Parameters ---
+input int    InpPeriod = 20;
+input double InpAlpha  = 0.1;
+input double InpBeta   = 0.05;
+
+//--- Indicator Buffers ---
+double    BufferOscillator[];
+
+//--- Global calculator object ---
+CHoltMACalculator_HA *g_calculator;
+
+//+------------------------------------------------------------------+
+//| Custom indicator initialization function.                        |
+//+------------------------------------------------------------------+
+int OnInit()
+  {
+   SetIndexBuffer(0, BufferOscillator, INDICATOR_DATA);
+   ArraySetAsSeries(BufferOscillator, false);
+
+   PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, 2);
+   IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("Holt Osc HA(%d, %.2f, %.2f)", InpPeriod, InpAlpha, InpBeta));
+   IndicatorSetInteger(INDICATOR_DIGITS, _Digits+2);
+
+   g_calculator = new CHoltMACalculator_HA();
+   if(CheckPointer(g_calculator) == POINTER_INVALID || !g_calculator.Init(InpPeriod, InpAlpha, InpBeta))
+     {
+      Print("Failed to initialize Holt MA HA Calculator.");
+      return(INIT_FAILED);
+     }
+   return(INIT_SUCCEEDED);
+  }
+
+//+------------------------------------------------------------------+
+//| Custom indicator deinitialization function.                      |
+//+------------------------------------------------------------------+
+void OnDeinit(const int reason)
+  {
+   if(CheckPointer(g_calculator) != POINTER_INVALID)
+      delete g_calculator;
+  }
+
+//+------------------------------------------------------------------+
+//| Custom indicator iteration 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)
+     {
+      double dummy_forecast[], dummy_level[];
+      g_calculator.Calculate(rates_total, PRICE_CLOSE, open, high, low, close, dummy_forecast, BufferOscillator, dummy_level);
+     }
+   return(rates_total);
+  }
+//+------------------------------------------------------------------+
+//+------------------------------------------------------------------+