Stop-Loss order :
Stop-Loss order is used to clear a position by buying (or selling) the currency pair of the position when the exchange rate reaches a specified level. Stop-Loss orders are typically used to limit any losses that might occur. For instance, it you are long USD/JPY at 118.48 and set a stop-loss at 118.40, your position will automatically be closed at 118.40 and you will be protected from a further price decline. Stop-Loss orders are particularly beneficial because they allow you a certain level of comfort when leaving a position open while you are no longer actively following the markets (i.e. when away from your computer, asleep, etc.).

Limit Order :
A limit order specifies that the order should be executed when the exchange rate of the specified currency pair crosses a specified threshold. Our system continuously monitors the set of open limit orders and the current exchange rates to determine when an order should be executed. A limit order will be executed within seconds of when the exchange rate crosses the target threshold. However, it is important to note that the exchange rate used for executing the limit order is the most current exchange rate at the time the order is executed and not necessarily the threshold specified in the order. Thus, the rate applied for the execution of the order may be either higher or lower than the specified threshold by a small amount because of the continuously changing exchange rates. Again, upper and lower bounds can be set to limit the risks.