You use a trailing stop loss. You get closed out 15% down from the top, not 15% down from purchase. The alternative in a 24 hour market is worse — the news of a real event hits and by the time you wake up and respond you’re down 50% or more and the stock isn’t coming back.

This policy change is to hunt profit from a safety mechanism used by retail traders.

It is something that should yield a lot of profit for 24 hour trading systems during a downturn.