AMEX is a joke. It's a glorified OTC. With some of the least liquid stocks out there.
Quote from thriftybob:
From experience, I can tell you that if there are enough big buy orders down there they won't even attempt running the stops. That's the only thing I know of that will prevent it.
Quote from aaronk321:
Damn, I had JST at 18.25 stop. It opened and killed my stop and then proceeded to jump $1 in less than 5 seconds. god damn it..