Woo! Yeah, what happened? Did your stop get triggered? That's why the stop should only be triggered based on ZG or GC. And the stop should have a limit.
Using stops for the metals is a precursor to disaster (especially on ECBOT) . Market depth for the metals runs very thin in the early morning hours and there appears to be some funds that have found a way to take advantage by running stops. I've replied to this topic on several occasions and many traders are still getting killed by this. The exchanges will not bust these trades either. These runs do not seem to occur as often on COMEX/GLOBEX as there is greater market depth and more orders lined in the book so it makes it much more difficult to run stops. Although, any large legitimate order will likely cascade sell/buy stops. Using any sort of stop order on the electronic metals is suicidal...