Forex brokers offer affiliate programs to traders who are looking to generate additional income. By referring new clients to the broker, affiliates can earn a commission on the trades that those clients make. While some brokers only offer commissions on the trades that the referred client makes, others will also give the affiliate a percentage of the spreads.The best forex brokers affiliate programs offer high commissions and low spreads. They also have good customer support and a robust platform. Some of the best forex brokers affiliate programs are offered by eToro, Plus500, and XM.