Block
orders can be used for large volume limit orders that consist
of at least 50 contracts.
Exchanges
Native:
Simulated
(by IB):
ISE
TWS
Links
For
information on how to create block orders, please refer to the
Example
You
want to buy 10,000 contracts of XYZ for the best possible
price. When you transmit the order, use the Order Ticket to
select Block Order. This ensures that your order
is made public and may result in a price improvement.