for electronic and outcry overlapped futures (for example, bond futures, live cattle.....), the bid ask size and tape appearing on IB TWS is the amount only traded electronic, or only traded outcry, or the total amount of both. Thanks. PS: another question, why some futures are only traded electronic, some traded only outcry no electronic, some traded outcry-electronic-separated, some traded outcry-electronic-overlapped. CONFUSED. Thanks for any comments.