miron_like:

I looked at your example. Frankly speaking, while there is not enough knowledge to fully understand it and then write it as it should. 

Can you tell me how to implement this task based on this code?

To get started, just take an example and remove all the extra stuff – what you don’t need.

Don’t understand how you are when using the method NormalizePrice  of the CSymbolInfo class, do you get prices that do not end in “0”on this symbol in SL and TP? You have both “1” and “9” there.

Second: put these prints:

//+------------------------------------------------------------------+
//| Open Buy position                                                |
//+------------------------------------------------------------------+
void OpenBuy(double lot,double sl,double tp)
  {
   sl=m_symbol.NormalizePrice(sl);
   tp=m_symbol.NormalizePrice(tp);

   if(check_volume_lot!=0.0)
      if(check_volume_lot>=volume)
        {
         if(m_trade.Sell(volume,NULL,m_symbol.Bid(),sl,tp))
           {
            if(m_trade.ResultDeal()==0)
              {
               Print("Sell -> false. Result Retcode: ",m_trade.ResultRetcode(),
                     ", description of result: ",m_trade.ResultRetcodeDescription(),
                     ", Bid: ",DoubleToString(m_symbol.Bid(),m_symbol.Digits()),
                     ", Ask: ",DoubleToString(m_symbol.Ask(),m_symbol.Digits()),
                     ", Last: ",DoubleToString(m_symbol.Last(),m_symbol.Digits()));
              }
            else
              {
               Print("Sell -> true. Result Retcode: ",m_trade.ResultRetcode(),
                     ", description of result: ",m_trade.ResultRetcodeDescription(),
                     ", Bid: ",DoubleToString(m_symbol.Bid(),m_symbol.Digits()),
                     ", Ask: ",DoubleToString(m_symbol.Ask(),m_symbol.Digits()),
                     ", Last: ",DoubleToString(m_symbol.Last(),m_symbol.Digits()));
              }
           }
         else
           {
            Print("Sell -> false. Result Retcode: ",m_trade.ResultRetcode(),
                  ", description of result: ",m_trade.ResultRetcodeDescription(),
                  ", Bid: ",DoubleToString(m_symbol.Bid(),m_symbol.Digits()),
                  ", Ask: ",DoubleToString(m_symbol.Ask(),m_symbol.Digits()),
                  ", Last: ",DoubleToString(m_symbol.Last(),m_symbol.Digits()));
           }
        }
//---
  }

Errors occur when: the opening price of the position does not match the Last price and the Last is equal to the stop (SL or TP).

Fresto:

I created the object. And with each new call to the onTick() function, I call the Refresh method. Just the most interesting thing is that in the position opening code everything is assigned in real time and why then the first orders pass, and the others do not.. First, it writes that invalid_price, then it also intersects with invalid_stop. Although I have been optimizing the exact same position opening code on other Expert Advisors for a long time, and everything is fine there.

P. s. is there any way to find out why this particular error crashes? Not just-invalid_price, but more specifically, what is the problem? 

I think this is the imposition of a ban on trading on gluing. No more thoughts.