If you do not square off your intraday position, it will be automatically squared off by the system before market closing at 3:15pm.  

How it works:

• Any open intraday position is not carried forward to the next day 
• If you don’t exit the position manually, the system will auto square off your position  
• This is done to prevent positions from turning into delivery unintentionally 
• This may entail certain charges, depending on your trading plan.