As you can see Forex Brokers offer their potential clients a large variety of services. For example a great number of Forex companies allow clients to trade Options. An option is a contract according to which a party has a right, but is not obliged to buy or sell some asset from other party during the agreed period of time at an agreed price (also called strike price). According to conditions of an Option Contract a seller receives a particular sum of money from a buyer. The majority of Option Contracts concern financial derivatives with financial underlying assets such as stock indexes and currencies. There are two major kinds of Options: a Call Option and a Put Option. The first gives the buyer the right to buy a particular asset while the second – the right to sell the asset. Option contracts are rather popular with Forex Brokers because they have a good potential for speculation. 
Here is the list of Forex Brokers working with Option Contracts.