Iâve searched Elite Trader and IBâs Discussion Board and even sent IB an email on how to enter a regular hours limit order that will participate in the opening cross. Iâve received no response from IB, but based on what Iâve read Iâve come to the conclusion that only certain method is that specified by Sparohok in an earlier thread, which is to use a directed order to the primary exchange and to ensure that "Regular trading hours only" is NOT checked. Using SMART will not work. NYSE directed limit orders are subject to a 1 cent specialist fee if held on the books longer than 5 minutes, so if you do direct your order to the NYSE and it is not filled on the open it behooves you to replace it with a SMART order which will not be subject to the fee. If you have many of these manual changes would be time-consuming and slow. You are almost forced to have an automated system. Does this reflect your understanding?