Quote from traderslair:
Yes, I have lately also noticed a change in spreads not seen on other brokers who are placed on the book at IB.
I also note that when I execute for example 50 or 80 contracts on the 6E and I look at a direct feed from the CME, my 80 order who got filled isn't displayed on the public time and sales. Meaning probably IB just filled it and held it or distributed internally to their customers.
I guess that's what they call 'smart'
