seatbackforward - i don't want to cancel it, i want the order to...

seatbackforward - i don't want to cancel it, i want the order to stay in place, abit like bot trading. say if the price reaches 50c, i want a buy order at 50.5c straight away. I can make that but once the buy order at 50.5c get filled, it won't be repeating my order if the price reaches 50c again. I want it to stay there permanently until i cancel it.