craigross,
I repeat again and I confirmed this with the head of operations (nevermind I've been on the prop desk for years, helped write some of the trading code, and know where we get our ticks from) - IB gets its ticks directly from Globex.
Not sure what the point of your questions on what %ownership I have - why is that your business?
Stop limits: as a trader I personally prefer stop limits for reasons like the NQ a few weeks ago when a firm entered an order to by 2000 NQ's instead of 200 and the market spiked 50 points only to immediately come back. A stop limit in this case gets a good fill, a market order is luck of the draw. I've seen other markets which are not as liquid as NQ spike up 2-3% on one large order, the first stops triggered get horrible fills 2-3% higher before the wave of sell orders refill the book to bring it back down.
As for stocks, same idea, i'd rather put a limit at a set price above market than to have the potential for an extrememly poor fill. (others will counter that when they want out, they want out at any price).
Back to Globex: Globex does not support stops on some interfaces and does it on different ways on others. If the new interface that IB rolled to last week supports native stops (we should be finding out within a few days), they will be moved there. (BTW, if Globex gives the go ahead, the change would most likely be put in very quickly).
Voodoo, as to stocks i don't know the ins and outs of all the exchange rules. I do know that certain exchanges only allow certain orders. I better confirm the routing with programmers before discussing further.
