16418 : Order with Invalid attributes rejected by the system
Pre-market orders can only be placed from 9:00 am to 9:07 am & only Limit [LMT] & Market [MKT] orders with DAY validity can be placed. If the above rule isn’t followed the order gets rejected & the above error is displayed.
If an After Market Order [AMO] order type other than Limit [LMT] or Market [MKT] with DAY validity is placed the order gets rejected and the above error will be shown.