how to modify trade wit ctrade ?

[Stefano Cerbioni]

Hi guys I’m trying to modify a trade with ctrade, but I get this error:

2025.09.19 09:15:49.991  PARTIALTAKEandSTP (EURUSD,M5)  Requested SET SL 1.18000 for ticket 21821394 (file symbol: EURUSD)
2025.09.19 09:15:49.991  PARTIALTAKEandSTP (EURUSD,M5)  SetPositionStopLoss: PositionModify failed for EURUSD SL=1.18000 TP=0.00000 - Error: 0
2025.09.19 09:15:49.991  PARTIALTAKEandSTP (EURUSD,M5)  Error setting StopLoss.

I’m calling the function like this – do you think it’s correct?

double tpToSet = (currentTP > 0) ? currentTP : EMPTY_VALUE; 
bool res = trade.PositionModify(sym, slPrice, tpToSet);
if(!res)
  {
   int err = GetLastError();
   PrintFormat("SetPositionStopLoss: PositionModify failed for %s SL=%.5f TP=%.5f - Error: %d", sym, slPrice, currentTP, err);
   // some brokers require a minimum distance (stop level) or the price is not accepted: log the error
   return false;
  }

[Csquared]

Stefano Cerbioni:

Hi guys I’m trying to modify a trade with ctrade, but I get this error:

I’m calling the function like this – do you think it’s correct?

Are you selecting the position first with PositionSelectByTicket() ? Your function should start something like this: 

void TrailingStop(){
   for (int i = PositionsTotal()-1; i >= 0; i--){                                                                           // Loop through all open positions
      ulong posTicket = PositionGetTicket(i);                                                                               // Get the current position's ticket in the loop
      if(PositionSelectByTicket(posTicket)){                                                                                // Select position ticket
        // Now you can use CTrade and modify stuff in here
      } 
   }
}