Yes, currency pairs and crosses have small % gains and losses when compared to stocks. But we must remember that stocks are different from currencies in nature. I've seen traders that make significant gains on in Forex. One Russian Forex trader made a gain of 3500% in less than 5 days (when the BoJ weakened the Yen). He doubled the account 35 times in a week, but that's suicide trading, since one mayn't last long with that kind of high risk.