Yeah, I've been reading about the liquidity argument there for a bit. I can understand spread widening in non USD Major pairs, but not in USD Major pairs.
In any event, I've been trading off and on for over 5 years and never got burned like this on a USD pair. Also, a lot of dealers offer fixed on USD Major pairs.
With this said, if I want to trade with Oanda, I am going to have to employ the same strategy that I used for Exotic Pair Stops.