I hope the Nsdq is losing market share for their decision to cut in half the hidden order rebate. I for one am now using Arca and Edge only. Hidden orders are on of the few equalizers against the games of the MM's. I was actually told by a person at Nasdaq OMX that MM's didn't like stepping into hidden orders and having to pay the take fee. So they reduced it to discourage it. That could be true but it is also a money grab by Nasdaq.