Just thought I would pass along a recent experience. Had a Stop Buy loaded above the market in a listed stock which I routed SMART. After the price was triggered, the NYSE put up a bad quote. I believe that they meant to put 56 at 56.10. Intead they flashed 56 at 57.10. At this point, IB's "Smart" routing starting filling my orders at any and all offers that is could find. In this case, it was 56.49 - which happened to be where ARCA was offering stock. NYSE immediately went offered at .08 and proceeded to trade back to the figure never trading above that price the rest of the day. When I called to complain, ARCA would NOT make the bust because for a split second, ARCA WAS the best offer available. Of course, the genius at IB's reply was "the high of the day was 56.49 - what is the problem". So - lesson learned. Do not use SMART routing when you have an away from the market Stop in NYSE issues.