When shares are sold on T+1 day, these shares are debited only on T+3 day, so how will the system know that you are performing a BTST trade?
You buy in CNC on T day so we know CNC charges apply, no brokerage. You sell in CNC on T+1 day so again CNC charges apply, no brokerage.
Do you have any reasoning as to how brokerage is charged automatically as per MIS rates?