If you need to place Stop or Profit in the open position or you need to move them to other levels (for example, you want to move Stop to breakeven stop), it can be done any time in the working hours of the exchange. In order to do this, double click the left hand side of the mouse in the icon of this terminal on the line S/L or T/P in the position where you want to change the Stop or Profit. You can enter the values you want in the special boxes of the displayed icon and press the Change button. Yes, if only you are not in the long term position if there is a gap against you, Stop Loss will not be able to help. None of brokers closes orders at a price which hasn't ever existed.