Direct and Smart Routing http://www.interactivebrokers.com/en/trading/orderRoutingLogics.php?ib_entity=llc I read the above website, but I still don't understand for the following: Smart Routing seems to be IB auto-routing system. Direct routing is that you can choose where to do rounting. 1) Are Direct & Smart Routing applicable in ALL US market ONLY? If so, what routing system markets outside US use? 2) How can I direct route my trades? In its website, when I click on "XX Direct Routing Destinations"; where XX can be anything like "Stock", "ETF", "Futures"; it directs me to the market exchange page. I'm confused. 3) What're the pros and cons between "DIRECT" and "SMART"? 4) Where can I learn more about "DIRECT"? Thanks!