The trailing stop is a useful tool for forex traders as it helps reduce losses and potentially increase profits by avoiding missing further profit potential when exiting at a preset take-profit limit. The trailing stop in MetaTrader is triggered as soon as your position moves into profit by the amount of the pips determined by your trailing stop value, in which case the stop-loss will move (up or down depending whether it is a Buy position or Sell position) by the same amount of pips determined as the trailing stop plus the spread between the bid and the ask price. After that, if the favorable move continues, the stop-loss will follow, pip by pip, the market price.