Have other orders cancelled if one is activated.

You may have several orders placed to open if a certain price is reached. You may have an order for a number of currency pairs. But, you don't want multiple positions open at the one time, due to protecting you capital. So you might want to set up several positions that look favorable, but then as soon as one of these positions is filled, you could have the rest automatically cancelled. This is for people like myself that have full time jobs and don't have time to watch the market all day long.