I trade size on ES and few others, never use stops as that could cause undue slippage beyond the first hour of trading, I have an area in mine I will get out, all programmed now, and will exit at so many at a time based on percentage available on the DOME, so if showing 280, will exit 80% or more then again and again till out, but my fail safe exit seldom gets hit, it is often reversals and again getting in on percentage so I get my price of becomes a limit.