I trade with IB, and am guilty of using their SMART route for my orders. Recently, my buddy has been copying a few of my earnings trades using Questrade. His position sizes are smaller than mine but he is getting MUCH quicker and slighlty better fills. Some reputable posters on this site have mentioned that the "SMART" route is only smart for IB. Interactive Brokers has populated the first few pages on google regarding their smart route and there are alot of non reputable people encouraging smart route (Difficult to get a true opinion). I am mostly trading multiple legged option strategies on both US and CAD exchanges + individual equities. Also from reading @Robert Morse posts, there is alot to learn about market making and how orders both complex and single legged are routed. Could anyone provide a book/paper that's up to date on this topic? After doing some reading on this topic I will admit that I feel like a fish leaving WAY to many half dimes on the floor.