Gain Affiliates is the partnership program for FOREX.com and City Index, two well-known trading brands operated by StoneX Group (formerly GAIN Capital). The CPA range of $150 to $650 per qualified referral represents solid earning potential, particularly for affiliates who can drive traders in premium markets. The backing of established, regulated brands gives affiliates credible products to promote, and the dual-brand structure means you can target different audience segments through the same program. FOREX.com has especially strong brand recognition in the US market, which is a significant advantage since many forex affiliate programs exclude US traffic entirely. The platform provides professional marketing materials, real-time tracking, and responsive affiliate management. However, the tiered CPA structure means newer affiliates start at the lower payout levels and must demonstrate volume before unlocking higher rates. Qualification criteria for conversions can be strict, requiring minimum deposits and trading activity from referred clients. The program is well-suited for forex review sites, trading educators, and financial content publishers who can deliver quality leads to reputable, regulated brokers.