Perhaps someone knowledgeable can answer this for me: Does anyone know if they are held at the broker, or if they are held at the exchange? Is there such a thing as hidden orders for options as well (and if the same applies for options)? Thanks.
Depends. Limit Orders are usually held by the exchange. Stop Orders vary, usually held by the brokers or liquidity providers. This really depends on the exchanges.
Interactive Brokers has native hidden orders only for INet: http://www.interactivebrokers.com/en/trading/orders/hidden.php?ib_entity=llc
Thank you all. A) Is this type of stuff up to the broker or up to the ECN/ exchange? B)_Any info regarding options?