you can get filled in less than a half second on any number of lots even 5000 can be filled in less than a second. you just wont like the price. cme has slippage charts based on lots. 10 lot will cost you 125 dollars in slippage typically in and out. this is why ken owner of citadel owns a billion in real estate and over the next 10 years will be the richest man in america as je continues to grow globally with riskless trades.