Actually, what I'm saying is the following. Don't put resting orders out onto IEX - a big player will take your liquidity in a big trade and you'll suffer the i

Actually, what I'm saying is the following. Don't put resting orders out onto IEX - a big player will take your liquidity in a big trade and you'll suffer the inevitable price impact. I.e., putting your orders on IEX rather than the open market is just a way to funnel your money to JP Morgan. It's far better to mingle your orders with HFT orders - that'll keep the big guys honest. You'll probably also pay lower fees.