An Off-hours Order or 'After Trade hours Order' (ATO)  is provided to allow customers to enter orders after closing in preparation for the next trading day. ATO orders are accepted after 6:00PM and before 8:50AM (approximately) during weekdays and anytime on weekends. Off-hours orders will be collected on a first come first serve basis, and will be sent to the Exchange for posting on a first in first out basis during pre-open session. After posting, all Off-hours orders immediately become Limit Day Orders and cannot be cancelled/modified during (9:15AM-9:30 AM). All orders will be governed by the Exchange's order regulations. For orders during market activity (9:00am-12:00nn and 1:30pm-3:30pm), please use the regular ENTER ORDERS function.