(Not sure if this is the right place to start this thread. It's been a while since I've looked in at ET.) What I want to do is enter a Limit-On-Open (LOO) sell order after hours, along with a bracket sell order. If the LOO executes then of course I want the bracket orders to cancel, otherwise if one of the legs hits the limit I will end up shorting the stock. So far the only broker I've found that can do this is IB. Anyone know of any others? Most of the major retail brokers (Schwab, TOS, etc) have never heard of LOO, and AFAIK most can only do One-Cancels-Other (OCO) (or Order-Cancels-Order (seems brokers call it by different names) pairs, not One-Cancels-All (OCA) groups.