how to get the opening value of the first candle of the previous day in period m15

[GP Quant Pro]

hey how toget the opening value of the first candle of the previioius day in period m15 with MQ5?

[Vladimir Karputov]

galdinotrader :
hey how toget the opening value of the first candle of the previioius day in period m15 with MQ5?

Algorithm:

we get the opening time of the previous candle on PERIOD_D1 (we request two elements ) - we get the opening time of the current and previous day

we get the opening time of the first candle at PERIOD_M15 (we request from the time of the previous day's opening, we request one element )

//+------------------------------------------------------------------+
//|                                                      Test_en.mq5 |
//|                              Copyright © 2019, Vladimir Karputov |
//|                                           http://wmua.ru/slesar/ |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2019, Vladimir Karputov"
#property link      "http://wmua.ru/slesar/"
#property version   "1.000"
//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
void OnStart()
  {
   MqlRates rates_D1[],rates_M15[];
   ArraySetAsSeries(rates_D1,true);  // rates_D1[0] - current day, rates_D1[1] - previous day
   ArraySetAsSeries(rates_M15,true);
   int start_pos=0,count=2;
   if(CopyRates(Symbol(),PERIOD_D1,start_pos,count,rates_D1)!=count)
      return;
   count=1;
   if(CopyRates(Symbol(),PERIOD_M15,rates_D1[1].time,count,rates_M15)!=count)
      return;
//---
   Print("first bar M15 previous day opened ",TimeToString(rates_M15[0].time),", price open ",DoubleToString(rates_M15[0].open,Digits()));
  }
//+------------------------------------------------------------------+

[GP Quant Pro]

Vladimir Karputov:

Algorithm:

we get the opening time of the previous candle on PERIOD_D1 (we request two elements ) - we get the opening time of the current and previous day

we get the opening time of the first candle at PERIOD_M15 (we request from the time of the previous day's opening, we request one element )

Thx but i got the following questions: how to  get the closing value of the first candle of the current day in m15 period?

rates_M15[0]  represents the first candle of today or the day before?

[Chris70]

As the first tick of a day is the identical opening price for all candles up to D1, yesterday's first M15 opening and D1 open share the same price, so why not simply take

open_firstM15_yesterday=iOpen(_Symbol,PERIOD_D1,1);

?

"Thx but i got the following questions: how to  get the closing value of the first candle of the current day in m15 period?"

Here it get a little more complicated. Maybe what helps is the fact that - if we go back in time - this is also the last M15 candle that has a candle time after or identical to todays D1 opening, so you can try this:

int index=0;
while (iTime(_Symbol,PERIOD_M15,index+1)>=iTime(_Symbol,PERIOD_D1,0)){index++;}
double close_firstM15_today=iClose(_Symbol,PERIOD_M15,index);

// (not tested)

[Vladimir Karputov]

galdinotrader :

Thx but i got the following questions: how to  get the closing value of the first candle of the current day in m15 period?

We use a similar algorithm:

we get the opening time of the current candle on PERIOD_D1 (we request one element ) - we get the opening time of the current

we get the first candle at PERIOD_M15 (we  request from the time of the current day's opening, we request one element  )

//+------------------------------------------------------------------+
//|                                                      Test_en.mq5 |
//|                              Copyright © 2019, Vladimir Karputov |
//|                                           http://wmua.ru/slesar/ |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2019, Vladimir Karputov"
#property link      "http://wmua.ru/slesar/"
#property version   "1.001"
//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
void OnStart()
  {
   MqlRates rates_D1[],rates_M15[];
   ArraySetAsSeries(rates_D1,true);
   ArraySetAsSeries(rates_M15,true);
   int start_pos=0,count=1;
   if(CopyRates(Symbol(),PERIOD_D1,start_pos,count,rates_D1)!=count)
      return;
   if(CopyRates(Symbol(),PERIOD_M15,rates_D1[0].time,count,rates_M15)!=count)
      return;
//---
   Print("first bar M15 current day closed ",TimeToString(rates_M15[0].time),", price open ",DoubleToString(rates_M15[0].close,Digits()));
  }
//+------------------------------------------------------------------+

[GP Quant Pro]

Vladimir Karputov:

We use a similar algorithm:

we get the opening time of the current candle on PERIOD_D1 (we request one element ) - we get the opening time of the current

we get the first candle at PERIOD_M15 (we  request from the time of the current day's opening, we request one element  )

solved! thank you very much