The CME listed the first financial futures in 1972 on seven currencies, and the complex still exists alongside the vastly larger over-the-counter FX market. The advantages are central clearing, a visible order book and no counterparty credit exposure; the disadvantages are fixed contract sizes and a quarterly expiry cycle.
Quoting convention is the main trap. Spot convention quotes USD/JPY as yen per dollar, but the yen future is quoted in dollars per yen, so the futures chart is the inverse of the spot chart. euro-fx-futures and most others quote dollars per unit, which matches EUR/USD spot.
Example: a 125,000-euro contract at 1.0850 has a notional of $135,625 and a minimum tick of 0.00005, worth $6.25. A 50-pip move is $625 per contract.
Related: euro-fx-futures, yen-futures, base-currency, quote-currency, dxy