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2026-07-27 20:47:44 +00:00 · 2026-07-06 10:36:06 +02:00
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+//+------------------------------------------------------------------+
+//|                                             LinReg_Slope_Pro.mq5 |
+//|                                          Copyright 2026, xxxxxxxx|
+//+------------------------------------------------------------------+
+#property copyright "Copyright 2026, xxxxxxxx"
+#property version   "1.01" // Increased decimal digits precision to show micro-pip fluctuations in Data Window
+#property description "Linear Regression Slope. Measures the exact direction and velocity of the trend."
+#property description "Features a zero-center colored histogram (Green = Bullish, Red = Bearish)."
+
+#property indicator_separate_window
+#property indicator_buffers 2
+#property indicator_plots   1
+
+//--- Levels (Zero line gravity pivot)
+#property indicator_level1 0.0
+#property indicator_levelcolor clrSilver
+#property indicator_levelstyle STYLE_DOT
+
+//--- Plot 1: Slope Histogram (Swapped Bull/Bear Thermal Palette)
+#property indicator_label1  "Slope"
+#property indicator_type1   DRAW_COLOR_HISTOGRAM
+// Colors: 0 = Neutral (Gray), 1 = Bullish (MediumSeaGreen), 2 = Bearish (Tomato)
+#property indicator_color1  clrGray, clrMediumSeaGreen, clrTomato
+#property indicator_style1  STYLE_SOLID
+#property indicator_width1  2
+
+#include <MyIncludes\LinearRegression_Calculator.mqh>
+
+enum ENUM_CANDLE_SOURCE
+  {
+   SOURCE_STANDARD,
+   SOURCE_HEIKIN_ASHI
+  };
+
+//--- Parameters
+input group                     "Slope Settings"
+input int                InpPeriod       = 20;              // Regression Period (N)
+input ENUM_CANDLE_SOURCE InpSource       = SOURCE_STANDARD;  // Candle Source
+input ENUM_APPLIED_PRICE InpPrice        = PRICE_CLOSE;     // Applied Price (Standard Mode)
+
+//--- Buffers
+double    BufSlope[];
+double    BufColors[];
+
+CLinearRegressionCalculator *g_calc;
+
+//+------------------------------------------------------------------+
+//| Init                                                             |
+//+------------------------------------------------------------------+
+int OnInit()
+  {
+   SetIndexBuffer(0, BufSlope,  INDICATOR_DATA);
+   SetIndexBuffer(1, BufColors, INDICATOR_COLOR_INDEX);
+
+   ArraySetAsSeries(BufSlope,  false);
+   ArraySetAsSeries(BufColors, false);
+
+//--- Factory Logic for HA support
+   bool use_ha = (InpSource == SOURCE_HEIKIN_ASHI);
+   if(use_ha)
+      g_calc = new CLinearRegressionCalculator_HA();
+   else
+      g_calc = new CLinearRegressionCalculator();
+
+   if(CheckPointer(g_calc) == POINTER_INVALID || !g_calc.Init(InpPeriod))
+     {
+      Print("Failed to initialize Linear Regression Calculator.");
+      return INIT_FAILED;
+     }
+
+   string type = use_ha ? " HA" : "";
+   string name = StringFormat("LinReg Slope%s(%d)", type, InpPeriod);
+   IndicatorSetString(INDICATOR_SHORTNAME, name);
+   PlotIndexSetString(0, PLOT_LABEL, "Slope");
+
+   PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, InpPeriod);
+
+//--- FIXED: Set dynamic decimal digits to match symbol precision + 2 (EURUSD = 7 digits) to show micro-pip details
+   IndicatorSetInteger(INDICATOR_DIGITS, _Digits + 2);
+
+   return(INIT_SUCCEEDED);
+  }
+
+//+------------------------------------------------------------------+
+//| Deinit                                                           |
+//+------------------------------------------------------------------+
+void OnDeinit(const int r)
+  {
+   if(CheckPointer(g_calc) != POINTER_INVALID)
+      delete g_calc;
+  }
+
+//+------------------------------------------------------------------+
+//| Calculate                                                        |
+//+------------------------------------------------------------------+
+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 < InpPeriod)
+      return 0;
+
+   if(CheckPointer(g_calc) == POINTER_INVALID)
+      return 0;
+
+//--- Force strict chronological indexing for state-safety on input price arrays
+   ArraySetAsSeries(time,  false);
+   ArraySetAsSeries(open,  false);
+   ArraySetAsSeries(high,  false);
+   ArraySetAsSeries(low,   false);
+   ArraySetAsSeries(close, false);
+
+   double s[], r2[], f[];
+   ArrayResize(s, rates_total);
+   ArrayResize(r2, rates_total);
+   ArrayResize(f, rates_total);
+
+// Run Engine
+   g_calc.CalculateState(rates_total, prev_calculated, open, high, low, close, InpPrice, s, r2, f);
+
+   int start = (prev_calculated > 0) ? prev_calculated - 1 : InpPeriod;
+
+   for(int i = start; i < rates_total; i++)
+     {
+      double sl = s[i];
+      BufSlope[i] = sl;
+
+      // Color Logic based on slope direction:
+      if(sl > 0.0)
+         BufColors[i] = 1.0;
+      else
+         if(sl < 0.0)
+            BufColors[i] = 2.0;
+         else
+            BufColors[i] = 0.0;
+     }
+
+   return(rates_total);
+  }
+//+------------------------------------------------------------------+