Beginner_v1

ÿþ//+------------------------------------------------------------------+

//|                                                         Beginner |

//|                                                 Copyright © 2025 |

//+------------------------------------------------------------------+

#property version   "1.02"

#property description "Beginner - basic indicator for marking chart's highs and lows."

#property description "Repaints."

#property strict



#property indicator_chart_window

#property indicator_buffers 2

#property indicator_plots   1

#property indicator_color1  clrBlue, clrRed

#property indicator_type1   DRAW_COLOR_ARROW

#property indicator_style1  STYLE_SOLID

#property indicator_width1  2



#define   SH_BUY   1

#define   SH_SELL  -1



input int AllBars = 0;  // AllBars: How many bars to calculate on. 0 - all.

input int Otstup  = 30; // Otstup: Percentage distance to consider new low/high.

input int Per     = 9;  // Period: Number of bars to seek high/low on.



// Indicator buffers.

double    Buf[];

double    BufCol[];



// Global variables.

int NB, UD;



//+------------------------------------------------------------------+

//| Custom indicator initialization function                         |

//+------------------------------------------------------------------+

void OnInit()

{

   IndicatorSetString(INDICATOR_SHORTNAME, "Beginner(" + IntegerToString(Per) + ")");



   PlotIndexSetInteger(0, PLOT_ARROW, 159);



   SetIndexBuffer(0, Buf, INDICATOR_DATA);

   SetIndexBuffer(1, BufCol, INDICATOR_COLOR_INDEX);

}



//+------------------------------------------------------------------+

//| Custom Beginner                                                  |

//+------------------------------------------------------------------+

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[])

{

   double dbOtstup = Otstup;



   ArraySetAsSeries(High, true);

   ArraySetAsSeries(Low, true);

   ArraySetAsSeries(Close, true);



   // NB will hold the number of bars for indicator calculation.

   if ((rates_total < (AllBars + Per)) || (AllBars == 0)) NB = rates_total - Per;

   else NB = AllBars;



   int CB = prev_calculated;

   

   if (CB < 0) return(-1);

   else if (NB > (rates_total - CB)) NB = rates_total - CB + 100;

   

   for (int SH = 1; SH < NB; SH++) // R is needed for distance between chart and arrows.

   {

      double R;

      int i;



      for (R = 0, i = SH; i < SH + 10; i++)

         R += (10 + SH - i) * (High[i] - Low[i]);



      R /= 55;



      double SHMax = High[ArrayMaximum(High, SH, Per)];

      double SHMin = Low[ArrayMinimum(Low, SH, Per)];

      double diff = (SHMax - SHMin) * dbOtstup / 100.0;

      

      Buf[rates_total - SH - 1] = EMPTY_VALUE;

      

      if ((Close[SH] < (SHMin + diff)) && (UD != SH_SELL))

      {

         Buf[rates_total - SH - 1] = Low[SH] - R * 0.5;

         BufCol[rates_total - SH - 1] = 0;

         UD = SH_SELL;

      }

      else if ((Close[SH] > (SHMax - diff)) && (UD != SH_BUY))

      {

         Buf[rates_total - SH - 1] = High[SH] + R * 0.5;

         BufCol[rates_total - SH - 1] = 1;

         UD = SH_BUY;

      }

   }

   

   return(rates_total);

}