trading with wrong open price

[robaczek122]

I use this function:

void BuySample3()
  {
//--- 3. example of buying at the specified symbol with specified SL and TP
   double volume=0.1;         // specify a trade operation volume
   string symbol="EURUSD";    //specify the symbol, for which the operation is performed
   int    digits=(int)SymbolInfoInteger(symbol,SYMBOL_DIGITS); // number of decimal places
   double point=SymbolInfoDouble(symbol,SYMBOL_POINT);         // point
   double bid=SymbolInfoDouble(symbol,SYMBOL_BID);             // current price for closing LONG
   double SL=bid-200*point;                                   // unnormalized SL value
   SL=NormalizeDouble(SL,digits);                              // normalizing Stop Loss
   double TP=bid+200*point;                                   // unnormalized TP value
   TP=NormalizeDouble(TP,digits);                              // normalizing Take Profit
//--- receive the current open price for LONG positions
   double open_price=SymbolInfoDouble(symbol,SYMBOL_ASK)+1.2;
   Print("UWAGA ",open_price);
   string comment=StringFormat("Buy %s %G lots at %s, SL=%s TP=%s",
                               symbol,volume,
                               DoubleToString(open_price,digits),
                               DoubleToString(SL,digits),
                               DoubleToString(TP,digits));
   if(!trade.Buy(volume,symbol,open_price,SL,TP,comment))
     {
      //--- failure message
      Print("Buy() method failed. Return code=",trade.ResultRetcode(),
            ". Code description: ",trade.ResultRetcodeDescription());
     }
   else
     {
      Print("Buy() method executed successfully. Return code=",trade.ResultRetcode(),
            " (",trade.ResultRetcodeDescription(),")");
     }
//---
  }

But when I test used wrong opening price:

double open_price=SymbolInfoDouble(symbol,SYMBOL_ASK)+1.2;

 It still open positions ... I tried to use a function:

   int deviation=1;
   trade.SetDeviationInPoints(deviation);

, but it did not help.

What should I do to get the effect: when I try to open using wrong opening value the program does not open position?