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Indicators/MyIndicators/Authors/Ehlers/1_Smoothers/Laguerre_Filter_Pro.mq5

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+//+------------------------------------------------------------------+
+//|                                           Laguerre_Filter_Pro.mq5|
+//|                                          Copyright 2025, xxxxxxxx|
+//|                                                                  |
+//+------------------------------------------------------------------+
+#property copyright "Copyright 2025, xxxxxxxx"
+#property link      ""
+#property version   "1.10" // Adapted to new universal engine
+#property description "John Ehlers' Laguerre Filter as a low-lag moving average."
+#property description "Includes an optional FIR filter for comparison."
+
+#property indicator_chart_window
+#property indicator_buffers 2
+#property indicator_plots   2
+
+#property indicator_label1  "Laguerre Filter"
+#property indicator_type1   DRAW_LINE
+#property indicator_color1  clrCrimson
+#property indicator_style1  STYLE_SOLID
+#property indicator_width1  1
+
+#property indicator_label2  "FIR Filter"
+#property indicator_type2   DRAW_LINE
+#property indicator_color2  clrGray
+#property indicator_style2  STYLE_DOT
+#property indicator_width2  1
+
+#include <MyIncludes\Laguerre_Filter_Calculator.mqh>
+
+//--- Input Parameters ---
+input double                    InpGamma        = 0.5;
+input ENUM_APPLIED_PRICE_HA_ALL InpSourcePrice  = PRICE_CLOSE_STD;
+input bool                      InpShowFIR      = false;
+
+//--- Indicator Buffers ---
+double    BufferFilter[];
+double    BufferFIR[];
+
+//--- Global calculator object ---
+CLaguerreFilterCalculator *g_calculator;
+
+//+------------------------------------------------------------------+
+int OnInit()
+  {
+   SetIndexBuffer(0, BufferFilter, INDICATOR_DATA);
+   SetIndexBuffer(1, BufferFIR,    INDICATOR_DATA);
+   ArraySetAsSeries(BufferFilter, false);
+   ArraySetAsSeries(BufferFIR,    false);
+   PlotIndexSetDouble(1, PLOT_EMPTY_VALUE, EMPTY_VALUE);
+
+   if(InpSourcePrice <= PRICE_HA_CLOSE)
+     {
+      g_calculator = new CLaguerreFilterCalculator_HA();
+      IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("Laguerre Filter HA(%.2f)", InpGamma));
+     }
+   else
+     {
+      g_calculator = new CLaguerreFilterCalculator();
+      IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("Laguerre Filter(%.2f)", InpGamma));
+     }
+
+   if(CheckPointer(g_calculator) == POINTER_INVALID || !g_calculator.Init(InpGamma, SOURCE_PRICE))
+     {
+      Print("Failed to create or initialize Laguerre Filter Calculator object.");
+      return(INIT_FAILED);
+     }
+
+   PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, 2);
+   PlotIndexSetInteger(1, PLOT_DRAW_BEGIN, 4);
+   IndicatorSetInteger(INDICATOR_DIGITS, _Digits);
+
+   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, BufferFilter, BufferFIR);
+
+   if(!InpShowFIR)
+     {
+      for(int i = 0; i < rates_total; i++)
+         BufferFIR[i] = EMPTY_VALUE;
+     }
+
+   return(rates_total);
+  }
+//+------------------------------------------------------------------+
+//+------------------------------------------------------------------+