I am TWS Pro user. yesterday I sent orders from TWS to ARCA directly instead of using SMART routing, the commission is 1 dollar for only 5 shares. if I use SMART order, that would be 0.2 dollars. from the webpage for tiered commission, IB says non SMART orders will have extra charge, which makes me think why IB charges non-SMART order. for IB Pro version, IB will not sell my order to third party. so what is going on here? it looks like IB monetizes on SMART Orders, does not it conflict with TWS PRO version commitment, that is, not sell order to third party?