Article-16308-MQL5-Moving-Average-From-Scratch/SMMA/SMMAonPriceCloseRAW.mq5

<EFBFBD><EFBFBD>//+------------------------------------------------------------------+
//|                                          SMMAonPriceCloseRAW.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  "SMMA"
#property indicator_type1   DRAW_LINE
#property indicator_color1  clrRed
#property indicator_style1  STYLE_SOLID
#property indicator_width1  1

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

//--- indicator buffers
double         MABuffer[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   SetIndexBuffer(0,MABuffer,INDICATOR_DATA);
   
//---
   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[])
  {
//--- 2 F8:;5 >B InpPeriod-1 4> B5:CI53> 10@0
   double result=0.0;
   for(int i=InpPeriod-1; i<rates_total; i++)
     {
      //--- ?5@2K9 @0AGQB
      if(i==InpPeriod-1)
        {
         //--- @0AAG8B05< ?@>ABCN A:>;L7OICN A@54=NN 4;O InpPeriod ?5@2KE 10@>2
         for(int j=0; j<InpPeriod; j++)
           {
            double price=close[i-j];
            result+=price;
           }
         result/=InpPeriod;
         //--- 70?8AK205< ?5@2>5 >B>1@0605<>5 7=0G5=85 SMMA, @0AAG8B0==>5 :0: SMA
         MABuffer[InpPeriod-1]=result;
        }
      //--- 2A5 ?>A;54CNI85 @0AGQBK
      else
         result=(MABuffer[i-1]*(InpPeriod-1)+close[i])/InpPeriod;
      
      //--- 0?8AK205< @57C;LB0B @0AGQB0 2 1CD5@
      MABuffer[i]=result;
     }
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+