No.
Quote from hoodooman:
I was talking to a broker/trader last night who said that all brokerage houses were bucket shops, i.e., they take the other side of your trade.
I told him he was wrong because IB was one broker who would route your order to other ECN's.
Then he got loud and bad tempered and that ended the conversation.
So what do you think?

Quote from walterjennings:
I am not 100% familiar with how all this works. The reason I would have an issue with IB taking the other side of my positions is that they then have an interest in seeing my trades fail. Its like a doctor owning the graveyard next doorI am unsure if there is anything they could actively do to make or break my trades (maybe something to do with hunting stops and limits). or possibly forerunning or making sure they get the other side before they decide on which price they will give me my side at. but it would make me feel better if they didn't have a stake in my trades.
On the other hand I do like the idea of faster execution of over the counter securities provided by them taking the other side. So I am sitting on the fence in this issue.
Quote from Option Trader:
IB even pays for order flow from other brokers; so obviously IB customers' orders will be routed to IB/Timber Hill.
But I don't see anything wrong with the above unless YOU were trying to buy at the bid OR sell at ask, but the trades of IB customers were being routed to the exchange where Timber Hill places their bid/ask, instead of to you. As to the answer to this question (at least about options), see http://www.elitetrader.com/vb/showthread.php?s=&postid=1263185#post1263185 [/
IB doesn't pay for order flow. stop passing false information.