OANDA doesn’t provide any products to American investors besides forex. In some ways, the clarity and concentration of a forex focus is ideal for all types of forex investors. The inexperienced can set their sights on mastering one corner of the market. The seasoned can take advantage of a trading platform that’s designed to manage nothing but forex. That said, if being able to diversify your interests while staying within the same brokerage is important to you, check out thinkorswim or Ally Invest.