i was using bitfinex to trade , which has some options i don't remember seeing anywhere else. a trailing stop is not complicated.. it's just a different way of making a bid. you choose how much you will trade and then set a value for how much you are willing to allow the price to drop before you sell. so if you start when the price is £100 and set a drop of £10, the price can go up and up to any value, but as soon as it drops by £10 you will automatically sell. if you time it right it's a great way to be safe.