Dies anyone know where to find trading software that works with exchange api?
I tried googling without luck but maybe i don't know the right terminology.

What I want to do is for example put in a limit futures order to buy at 19500 with a stop loss at 19000, but I want to program it so if the price goes above 20500 it will automatically change my stop loss to 20000, to prevent loosing profits if the price goes down.
Is it possible to do this on any exchange?
I thought about making a small app to do it with api's but maybe it already exists.
Thanks in advance for any help.