//+------------------------------------------------------------------+
//|                                           SMAonPriceCloseRAW.mq5 |
//|                                  Copyright 2024, MetaQuotes Ltd. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2024, MetaQuotes Ltd."
#property link      "https://www.mql5.com"
#property version   "1.00"
#property indicator_chart_window
#property indicator_buffers 1
#property indicator_plots   1

//--- plot MA
#property indicator_label1  "SMA"
#property indicator_type1   DRAW_LINE
#property indicator_color1  clrRed
#property indicator_style1  STYLE_SOLID
#property indicator_width1  1

//--- input parameters
input int      InpPeriod   =  10;   // SMA Period

//--- indicator buffers
double         MABuffer[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   SetIndexBuffer(0,MABuffer,INDICATOR_DATA);
   
//--- успешная инициализация
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration 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[])
  {
//--- в цикле от значения InpPeriod до текущего бара истории
   for(int i=InpPeriod; i<rates_total; i++)
     {
      //--- рассчитываем среднее цен close за InpPeriod баров
      double result=0;
      for(int j=0; j<InpPeriod; j++)
         result+=close[i-j];
      result/=InpPeriod;
      
      //--- Записываем результат расчёта в буфер
      MABuffer[i]=result;
     }
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+