BSE says trading halt due to tech error

 "In case of a 15% movement of either index, there will be a 2-hour market halt if the movement takes place before 1:00 p.m. If the 15% trigger is reached on or after 1:00 p.m. but before 2 p.m., there will be 1-hour halt. If the 15% trigger is reached on or after 2:00 p.m. the trading will halt for the remainder of the day.

"In case of a 20% movement of the either index, the trading will halt for the remainder of the day."