I've recently started Intraday swing trading/Scalping QQQ's to supplement my waning daily stock swing trades, and am wondering if there is an advantage to going with the eminis vs. the QQQ's? I currently trade 1000-2000 shares of QQQ's and get in and out on the penny (no slippage). Are the eminis just as liquid, and can you do the equivalent of 5,000 shares of QQQ's without any slippage in the mini's? I notice the spread is .25, does this hurt or help if you are going for .10 - .20 cent moves in the index? Do people trade the Nasd emini vs. the QQQ's because they lack the funds to buy the shares or are they truly better?