All Forex trading involves buying foreign currencies at a certain rate and selling it at another rate, taking advantage of the difference in exchange rates of currency in various markets. The Forex market literally dwarfs the commodities and futures markets. Forex is the largest financial market in terms of liquidity. Forex is an interbank market created in 1971 when international trade transitioned from fixed to floating exchange rates. Forex is the largest market on margin carries a high level of risk, and trading currencies profitably takes hard work and practice.