In Interactive Broker, you can use 3 method for putting order 1. Best 2. Best_ECN 3. NASDAQ Which one is the fastest & most reliable order route?
i'd stay away from best_ecn until it is formally released this or next week just to be certain that it has been completely tested. I imagine that will be the fastest route as you will go directly to ECN's and avoid market makers. NASDAQ gets sent to Nasdaq which may lead to a fast or slow fill depending on the market maker and your type of order. BEST will choose the best price available, if it goes to an ECN like Island the fill will be immediate. If Nasdaq, see above.