@fxdreema
The thing is that there are ticks... there are no deals, but as I understand MT5 considers a "tick" as anything that changes the bid/ask spread or the last deal in the market. So in circuit breakers we see changes in bid/ask, but without any deals, just by placement and cancellations of orders on the order book.... so it's quite different from Forex, where brokers make their own bid/ask spread and decide when it's time to change it.
The mess gets really ugly on the CFDs, that trade through the broker's own bid/ask, but are arbitraged by the broker's market markers on the centralised markets. So when there is a circuit breaker on the exchange where, let's say Apple stocks are traded, the Apple CFDs will get REAAAAALY ugly...
Anyways, thanks for the help.