Does anyone know the official NYSE/AMEX rules for when an order is considered Billable? According to most firm's price schedules a billable is only charge when the order takes more than 5 mintues to execute. However I have also been told you are charged for a billable if you receive price improvement (only listed on some sheets). Ameritrade (who I don't use) lists billable orders at: Billable ($0.0125/share): AMEX: any order 2100 shares or more; any short sell order NYSE: any order executing in more than 5 minutes http://www.ameritradepro.com/fee.htm To add to the confusion I understand there are special rules for billables on QQQ. I see this fee add but am never provided a breakdown. Does anyone have any insight on this issue.