Trading the foreign currency market, or the Forex Market, as it is commonly known, is the most developed financial market in the world. The Forex Market is not concentrated in any one exchange, rather the vast majority of forex trades are private deals between two parties in what is known as an 'Over the Counter' or OTC market. The currencies are traded and quoted in pairs such as Euro/U.S. Dollar or U.S. Dollar/Japanese Yen, where a deal is the combination of selling one currency while buying another currency at the same time.