Use, After Market Order (AMO) option.
On Pi, any BUY/SELL orders placed after 4PM of the previous trading day and before 9AM of the current trading day are automatically executed as After Market Orders.
Orders are placed using the CNC on the Previous day and MIS or CNC on the current day.
AMO placed into the system cannot be modified or canceled between 9AM and 9:15AM
AMO orders are matched during the pre open session.
If not matched , they are converted to normal order at 9:15AM