An order type that may be appropriate if you are trying to buy or sell a block of stock by trading against other IBKR clients without exposing your interest to the public markets. Set the destination of an order to IBDARK to make it an IBDARK order. If you want an immediate or faster fill or if you want to expose your trading interest in the public markets, you should not route your order to IBDARK as these orders will not be routed or displayed outside of IBKR. For more information, see the IBDARK Orders page.