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Indicators/MyIndicators/Authors/Ehlers/5_Ehlers_Hybrids/MACD_MAMA_Line_Pro.mq5

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+//+------------------------------------------------------------------+
+//|                                           MACD_MAMA_Line_Pro.mq5 |
+//|                                          Copyright 2026, xxxxxxxx|
+//+------------------------------------------------------------------+
+#property copyright "Copyright 2026, xxxxxxxx"
+#property version   "1.00"
+#property description "MACD Line based on MAMA and FAMA adaptive averages."
+#property description "Displays only the MACD Line (MAMA - FAMA)."
+
+#property indicator_separate_window
+#property indicator_buffers 1
+#property indicator_plots   1
+
+//--- Plot 1: MACD Line
+#property indicator_label1  "MACD Line"
+#property indicator_type1   DRAW_LINE
+#property indicator_color1  clrDodgerBlue
+#property indicator_style1  STYLE_SOLID
+#property indicator_width1  1
+#property indicator_level1  0.0
+
+#include <MyIncludes\MACD_MAMA_Calculator.mqh>
+
+//--- Input Parameters
+input group                     "MAMA Settings"
+input double                    InpFastLimit    = 0.5;   // Fast Limit
+input double                    InpSlowLimit    = 0.05;  // Slow Limit
+input ENUM_APPLIED_PRICE_HA_ALL InpSourcePrice  = PRICE_CLOSE_STD;
+
+//--- Buffers
+double    BufferMACD[];
+
+//--- Global Object
+CMACDMAMACalculator *g_calculator;
+
+//+------------------------------------------------------------------+
+//| OnInit                                                           |
+//+------------------------------------------------------------------+
+int OnInit()
+  {
+   SetIndexBuffer(0, BufferMACD, INDICATOR_DATA);
+   ArraySetAsSeries(BufferMACD, false);
+
+//--- Factory Logic
+   if(InpSourcePrice <= PRICE_HA_CLOSE)
+      g_calculator = new CMACDMAMACalculator_HA();
+   else
+      g_calculator = new CMACDMAMACalculator();
+
+//--- Initialize
+// Note: Signal params are dummy here (9, SMA) as we only need the MACD Line
+   if(CheckPointer(g_calculator) == POINTER_INVALID ||
+      !g_calculator.Init(InpFastLimit, InpSlowLimit, 9, SMA))
+     {
+      Print("Failed to initialize MACD MAMA Calculator.");
+      return(INIT_FAILED);
+     }
+
+//--- Shortname
+   string type = (InpSourcePrice <= PRICE_HA_CLOSE) ? " HA" : "";
+   IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("MACD MAMA Line%s(%.2f, %.2f)", type, InpFastLimit, InpSlowLimit));
+
+//--- Visuals
+   int draw_begin = 50; // MAMA needs warmup
+   PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, draw_begin);
+   IndicatorSetInteger(INDICATOR_DIGITS, _Digits + 1);
+
+   return(INIT_SUCCEEDED);
+  }
+
+//+------------------------------------------------------------------+
+//| OnDeinit                                                         |
+//+------------------------------------------------------------------+
+void OnDeinit(const int reason)
+  {
+   if(CheckPointer(g_calculator) != POINTER_INVALID)
+      delete g_calculator;
+  }
+
+//+------------------------------------------------------------------+
+//| OnCalculate                                                      |
+//+------------------------------------------------------------------+
+int OnCalculate(const int rates_total,
+                const int prev_calculated,
+                const datetime &time[],
+                const double &open[],
+                const double &high[],
+                const double &low[],
+                const double &close[],
+                const long &tick_volume[],
+                const long &volume[],
+                const int &spread[])
+  {
+   if(rates_total < 50)
+      return(0);
+
+   ENUM_APPLIED_PRICE price_type = (InpSourcePrice <= PRICE_HA_CLOSE) ?
+                                   (ENUM_APPLIED_PRICE)(-(int)InpSourcePrice) :
+                                   (ENUM_APPLIED_PRICE)InpSourcePrice;
+
+   g_calculator.CalculateMACDLineOnly(rates_total, prev_calculated, price_type, open, high, low, close,
+                                      BufferMACD);
+
+   return(rates_total);
+  }
+//+------------------------------------------------------------------+