I am a customer with Oanda. None of those currencies are on the platform. You're right, they do offer a few exotics, but nothing too exciting. I have traded USD/MXN and EUR/HUF a bit, and like to be able to do that, but the reason I am with Oanda is because I am a low volume, conservative trader. I like the interest on the balance, continual interest, and ability to make extremely small trades. If I were more active, I would have issues. I actually use other brokers for my active trading. That being said, they work for one style I trade (long term, low volume, small trades.)