_HPCS_Adv4_MT4_Indi_V01_WE

//+------------------------------------------------------------------+
//|                                   _HPCS_Adv4_MT4_Indi_V01_WE.mq4 |
//|                        Copyright 2021, MetaQuotes Software Corp. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2021, MetaQuotes Software Corp."
#property link      "https://www.mql5.com"
#property version   "1.00"
#property strict
#property indicator_chart_window
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping

   EventSetTimer(30);
//---
   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[])
  {
//---
   
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+
//| Timer function                                                   |
//+------------------------------------------------------------------+
void OnTimer()
  {
//---
  takeSnapshot();
  
  }
//+------------------------------------------------------------------+
void takeSnapshot()
{
   //need to be set timer in EventSetTimer in Init and call this function in OnTimer and then EventSetTimer in Init
   static int snapshot_counter = 0 ;
   ChartScreenShot(0,StringConcatenate("snap_",snapshot_counter),800,600,ALIGN_CENTER);
   snapshot_counter++;
}