Try sentryderivatives.com, they are part of Ava Trade. Vanilla options on 40 pairs + gold and more, any day/any strike, minimum trade size is option on 10,000. And spreads look like the best I have ever seen online.

FX options brokers

There are only two good FX Options platforms/brokers out there. Saxo Bank is consistent, but their margins are high and they charge $10 fee for small trades - so on small size option of $10,000 that is adding 20 pips of bid/offer spread. Ava Trade ...

FX options brokers

Of course Binary Options have greeks! And they are easy to calculate (at mid-market). Pricing of the options is simple - in the Black-Scholes formula, N(d2) is the price and delta of the option. It is the probability that the asset price will be ...

Why Binary Forex Options are better than Spot Forex