Hi Darth
I see Jon answered the question but to make it a bit clearer.
I knew I wanted to sell some shares, I thought it might keep going up, but didn't want to risk it going much lower if it didn't go up.
So I placed an order 2% below the last high price ( a trailing stop ) . So as the price moves up the price I would sell keeps moving up ( trailing by 2% )
You can set the trailing % any amount you want but 2% to 10% is typical.
A risk is that a security will fall a lot overnight and the order will fill a LOT lower, in which case a trailing stop limit order would be better but that might not fill at all.
Stop limit orders are an order you can place , I am not sure a TRAILING stop limit is an order you can actually place.
I suggest you Google " stock order types"
Toofuzzy
Take the road less traveled. It will make all the difference.