Speak to the people that had stops when EUR/CHF crashed on 15/01/2015. Stops didn't save them. Many could only exit after the event. With leverage being at least 1:100 and with a 20% drop, I'd hate to think what became of the people on the wrong side of the trade.
Don't get me wrong - stops (especially trailing stops) are a great tool to get out of a trade, but if one is relying on it to save their skin in a risky trade, then there's likely greater concerns for the trading strategy than the stops itself.
