ANother IB question. It lists Nasdaq as something that you can trade with. What exactly is this? I thought it was the best of the market makers, but on checking a Level II screen I see that this is not so. There are plenty of times when there are only ECNs on the best bid which shows as the bid for Nasdaq on the IB system. So I think I am confused. Thanks.
you should ask directly the IB staff with their live help. http://www.interactivebrokers.com/ live help chat