Quote from trading_time:
I am not currently trading futures so my info may be wrong.
I have done research on slippage for the very same reason you are. I have asked dozens of people they pretty much all say the same thing.
I was once in a trading room and some fellow used a market order to exit his ES, it was around lunch time, and he claimed to have had 2 ticks slippage. Now I think that this was a rare occasion, because most everyone else I have talked to said with a market thatâs not moving to drastically fast 1 tick is to be expected, and some times 0 slippage. So it appears that 2 ticks can happen but itâs rare.
Now the ER is not as deep as the ES, if trading under 5 lots I would expect about the same⦠over 10 lots I would be willing to bet 1 to 3 ticks slippage using market orders, depending on conditions. Now this is just my assumption, I could be totally wrong!