I would not worry about slippage at this stage of the game with globex, etc...If you pick your spots right, understand where the market might "slip", (i.e. break a pivot high or low and take out a row of resting stops), then you are doing fine...Alot of time you have to know where the market is likely to get dicey...And each day is different regarding movement and potential slippage...Obviously, you should also understand that the time frame you are trading on will have a dramatic affect on how much you get hit with slippage...If you are trading micro time frames and trying to get ticks, you are going to have a higher cost of trading...If you enter on breaks with the micro trends you are going to have more slippage...If you exit when the market runs against you (i.e. trailing stops) you are going to get slippage...BUT if you enter against the micro time frame, you get positive slippage, if you exit as market runs in your favor, you get positive slippage...so, to answer your question, it depends...lol