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2026-08-01 06:37:44 +00:00 · 2025-10-30 13:56:22 +01:00
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+//+------------------------------------------------------------------+
+//|                                        Correlation_Trend_Pro.mq5 |
+//|                                          Copyright 2025, xxxxxxxx|
+//|                                                                  |
+//+------------------------------------------------------------------+
+#property copyright "Copyright 2025, xxxxxxxx"
+#property version   "1.00"
+#property description "John Ehlers' Correlation Trend Indicator."
+
+#property indicator_separate_window
+#property indicator_buffers 1
+#property indicator_plots   1
+#property indicator_label1  "Correlation"
+#property indicator_type1   DRAW_LINE
+#property indicator_color1  clrDodgerBlue
+#property indicator_style1  STYLE_SOLID
+#property indicator_width1  1
+
+#property indicator_minimum -1.1
+#property indicator_maximum 1.1
+#property indicator_level1 0.0
+#property indicator_levelstyle STYLE_SOLID
+#property indicator_levelcolor clrGray
+
+#include <MyIncludes\Correlation_Trend_Calculator.mqh>
+
+//--- Input Parameters ---
+input int                       InpPeriod       = 20;
+input ENUM_APPLIED_PRICE_HA_ALL InpSourcePrice  = PRICE_CLOSE_STD;
+
+//--- Indicator Buffers ---
+double    BufferCorr[];
+
+//--- Global calculator object ---
+CCorrelationTrendCalculator *g_calculator;
+
+//+------------------------------------------------------------------+
+int OnInit()
+  {
+   SetIndexBuffer(0, BufferCorr,  INDICATOR_DATA);
+   ArraySetAsSeries(BufferCorr,  false);
+
+   if(InpSourcePrice <= PRICE_HA_CLOSE)
+     {
+      g_calculator = new CCorrelationTrendCalculator_HA();
+      IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("Corr HA(%d)", InpPeriod));
+     }
+   else
+     {
+      g_calculator = new CCorrelationTrendCalculator();
+      IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("Corr(%d)", InpPeriod));
+     }
+
+   if(CheckPointer(g_calculator) == POINTER_INVALID || !g_calculator.Init(InpPeriod))
+     {
+      Print("Failed to initialize Correlation Trend Calculator.");
+      return(INIT_FAILED);
+     }
+
+   PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, InpPeriod - 1);
+   IndicatorSetInteger(INDICATOR_DIGITS, 2);
+
+   return(INIT_SUCCEEDED);
+  }
+
+//+------------------------------------------------------------------+
+void OnDeinit(const int reason)
+  {
+   if(CheckPointer(g_calculator) != POINTER_INVALID)
+      delete g_calculator;
+  }
+
+//+------------------------------------------------------------------+
+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, BufferCorr);
+   return(rates_total);
+  }
+//+------------------------------------------------------------------+
+//+------------------------------------------------------------------+