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Indicators/MyIndicators/Stochastic_HeikenAshi.mq5

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+//+------------------------------------------------------------------+
+//|                                       Stochastic_HeikenAshi.mq5  |
+//|                      Copyright 2025, xxxxxxxx                    |
+//|                                                                  |
+//+------------------------------------------------------------------+
+#property copyright "Copyright 2025, xxxxxxxx"
+#property link      ""
+#property version   "1.01" // Corrected calculation loops to prevent array errors
+#property description "Stochastic Oscillator on Heiken Ashi data"
+
+#include <MyIncludes\HA_Tools.mqh>
+
+//--- Indicator Window and Level Properties ---
+#property indicator_separate_window
+#property indicator_buffers 5 // %K, %D, and 3 calculation buffers
+#property indicator_plots   2
+#property indicator_level1 20.0
+#property indicator_level2 80.0
+#property indicator_minimum 0.0
+#property indicator_maximum 100.0
+
+//--- Plot 1: %K line (Main)
+#property indicator_label1  "HA_%K"
+#property indicator_type1   DRAW_LINE
+#property indicator_color1  clrLightSeaGreen
+#property indicator_style1  STYLE_SOLID
+#property indicator_width1  1
+
+//--- Plot 2: %D line (Signal)
+#property indicator_label2  "HA_%D"
+#property indicator_type2   DRAW_LINE
+#property indicator_color2  clrRed
+#property indicator_style2  STYLE_DOT
+#property indicator_width2  1
+
+//--- Input Parameters ---
+input int InpKPeriod = 5;
+input int InpDPeriod = 3;
+input int InpSlowing = 3;
+
+//--- Indicator Buffers ---
+double    BufferHA_K[];
+double    BufferHA_D[];
+double    BufferRawK[];
+double    BufferHighest[];
+double    BufferLowest[];
+
+//--- Global Objects and Variables ---
+int              ExtKPeriod, ExtDPeriod, ExtSlowing;
+CHA_Calculator   g_ha_calculator;
+
+//--- Forward declarations for helper functions ---
+double Highest(const double &array[], int period, int current_pos);
+double Lowest(const double &array[], int period, int current_pos);
+
+//+------------------------------------------------------------------+
+//| Custom indicator initialization function.                        |
+//+------------------------------------------------------------------+
+void OnInit()
+  {
+   ExtKPeriod = (InpKPeriod < 1) ? 1 : InpKPeriod;
+   ExtDPeriod = (InpDPeriod < 1) ? 1 : InpDPeriod;
+   ExtSlowing = (InpSlowing < 1) ? 1 : InpSlowing;
+
+   SetIndexBuffer(0, BufferHA_K,    INDICATOR_DATA);
+   SetIndexBuffer(1, BufferHA_D,    INDICATOR_DATA);
+   SetIndexBuffer(2, BufferRawK,    INDICATOR_CALCULATIONS);
+   SetIndexBuffer(3, BufferHighest, INDICATOR_CALCULATIONS);
+   SetIndexBuffer(4, BufferLowest,  INDICATOR_CALCULATIONS);
+
+   ArraySetAsSeries(BufferHA_K,    false);
+   ArraySetAsSeries(BufferHA_D,    false);
+   ArraySetAsSeries(BufferRawK,    false);
+   ArraySetAsSeries(BufferHighest, false);
+   ArraySetAsSeries(BufferLowest,  false);
+
+   IndicatorSetInteger(INDICATOR_DIGITS, 2);
+   PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, ExtKPeriod + ExtSlowing - 2);
+   PlotIndexSetInteger(1, PLOT_DRAW_BEGIN, ExtKPeriod + ExtSlowing + ExtDPeriod - 3);
+   IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("HA_Stoch(%d,%d,%d)", ExtKPeriod, ExtDPeriod, ExtSlowing));
+  }
+
+//+------------------------------------------------------------------+
+//| Stochastic Oscillator on Heiken Ashi calculation function.       |
+//+------------------------------------------------------------------+
+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 < ExtKPeriod + ExtSlowing + ExtDPeriod)
+      return(0);
+
+//--- STEP 1: Calculate Heiken Ashi bars
+   if(!g_ha_calculator.Calculate(rates_total, 0, open, high, low, close))
+      return(0);
+
+//--- STEP 2, 3, 4, 5: Main calculation loop from past to present
+   for(int i = 0; i < rates_total; i++)
+     {
+      // --- Calculate Highest and Lowest for Raw %K ---
+      if(i >= ExtKPeriod - 1)
+        {
+         BufferHighest[i] = Highest(g_ha_calculator.ha_high, ExtKPeriod, i);
+         BufferLowest[i]  = Lowest(g_ha_calculator.ha_low, ExtKPeriod, i);
+
+         double range = BufferHighest[i] - BufferLowest[i];
+         if(range > 0)
+            BufferRawK[i] = (g_ha_calculator.ha_close[i] - BufferLowest[i]) / range * 100.0;
+         else
+            BufferRawK[i] = (i > 0) ? BufferRawK[i-1] : 50.0;
+        }
+      else
+        {
+         // Not enough data yet for these buffers
+         BufferHighest[i] = 0;
+         BufferLowest[i] = 0;
+         BufferRawK[i] = 0;
+        }
+
+      // --- Calculate Slow %K (Main Line) ---
+      if(i >= ExtKPeriod + ExtSlowing - 2)
+        {
+         double sum = 0;
+         for(int j = 0; j < ExtSlowing; j++)
+           {
+            sum += BufferRawK[i-j];
+           }
+         BufferHA_K[i] = sum / ExtSlowing;
+        }
+      else
+        {
+         BufferHA_K[i] = 0; // Not enough data yet
+        }
+
+      // --- Calculate %D (Signal Line) ---
+      if(i >= ExtKPeriod + ExtSlowing + ExtDPeriod - 3)
+        {
+         double sum = 0;
+         for(int j = 0; j < ExtDPeriod; j++)
+           {
+            sum += BufferHA_K[i-j];
+           }
+         BufferHA_D[i] = sum / ExtDPeriod;
+        }
+      else
+        {
+         BufferHA_D[i] = 0; // Not enough data yet
+        }
+     }
+   return(rates_total);
+  }
+
+// ... (Highest and Lowest functions remain the same) ...
+double Highest(const double &array[], int period, int current_pos)
+  {
+   double res = array[current_pos];
+   for(int i = 1; i < period; i++)
+     {
+      int index = current_pos - i;
+      if(index < 0)
+         break;
+      if(res < array[index])
+         res = array[index];
+     }
+   return(res);
+  }
+//+------------------------------------------------------------------+
+//|                                                                  |
+//+------------------------------------------------------------------+
+double Lowest(const double &array[], int period, int current_pos)
+  {
+   double res = array[current_pos];
+   for(int i = 1; i < period; i++)
+     {
+      int index = current_pos - i;
+      if(index < 0)
+         break;
+      if(res > array[index])
+         res = array[index];
+     }
+   return(res);
+  }
+//+------------------------------------------------------------------+
+//+------------------------------------------------------------------+