//+------------------------------------------------------------------+
//| HHLLindicators.mq4
//| Copyright 2023, Aurel Ispas
//| http://www.yourwebsite.com
//+------------------------------------------------------------------+
#property copyright "AurelIspas"
#property link      "http://www.ok.ro"

#property indicator_chart_window
#property indicator_buffers 5

// Define colors as numeric values
#property indicator_color1 16777215  // White
#property indicator_color2 65535    // Aqua
#property indicator_color3 65535    // Aqua
#property indicator_color4 16744448  // Orange
#property indicator_color5 16744448  // Orange

// Input parameters
input int CountBars = 4000;
input int bandlen = 48;

// Buffers
double highline[];
double lowline[];
double highline2[];
double lowline2[];

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
{
   // Indicator buffers
   IndicatorBuffers(4);
   SetIndexBuffer(0, highline);
   SetIndexBuffer(1, lowline);
   SetIndexBuffer(2, highline2);
   SetIndexBuffer(3, lowline2);
   
   // Indicator colors and styles
   SetIndexStyle(0, DRAW_LINE);
   SetIndexStyle(1, DRAW_LINE);
   SetIndexStyle(2, DRAW_LINE);
   SetIndexStyle(3, DRAW_LINE);
   
   return(INIT_SUCCEEDED);
}

//+------------------------------------------------------------------+
//| Custom indicator 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[])
{
   int limit = MathMin(rates_total - bandlen - 1, CountBars);
   
   if (limit < 1)
      limit = 1;
   
   ArraySetAsSeries(highline, true);
   ArraySetAsSeries(lowline, true);
   ArraySetAsSeries(highline2, true);
   ArraySetAsSeries(lowline2, true);
   
   for (int shift = limit; shift >= 0; shift--)
   {
      double H1, L1;
      double H2, L2;

      H1 = iHigh(Symbol(), 0, iHighest(Symbol(), 0, PRICE_HIGH, bandlen, shift + 1));
      L1 = iLow(Symbol(), 0, iLowest(Symbol(), 0, PRICE_LOW, bandlen, shift + 1));
      highline[shift] = H1;
      lowline[shift] = L1;

      H2 = high[shift + 1];
      L2 = low[shift + 1];
      
      for (int k = 1; k < bandlen; k++)
      {
         double HV = high[shift + k + 1];
         double LV = low[shift + k + 1];
         
         if (HV > H2)
            H2 = HV;
         
         if (LV < L2)
            L2 = LV;
      }
      
      highline2[shift] = H2;
      lowline2[shift] = L2;
   }

   return(rates_total);
}
//+------------------------------------------------------------------+