In case price change calculated by a certain reference value reaches or exceeds threshold values (rates) determined by the Exchange while transactions in a stock are carried out with continuous trading method in the session, transactions of the related stock  will be temporarily halted and carried on to the order collection stage of a call auction.

At this stage price is determined in a call auction using single price method in the related stock. Then the related stock is again taken to continuous trading and transactions are continued after processes single price method are completed. 

Circuit breaker page for click.