I have seen "untrusted markets" in the DAX CFD a few times, mostly around news. The whole book goes blank and you cant trade for a few seconds. I think its quite a bad idea to do that, but atleast you know when its likely to happen (news). I have never seen that happen in FX tho, and i stare at the quote screen pretty much all day.
Slippage appears to be rather minimal, but i have not collected stats on this. But its reasonable to assume it can happen with stop and mkt orders on high impact news, like everywhere else.
Slippage appears to be rather minimal, but i have not collected stats on this. But its reasonable to assume it can happen with stop and mkt orders on high impact news, like everywhere else.