Forex Trading in London accounted for 36.7% of the total, making London by far the most important global center for foreign exchange trading. In second and third places, respectively, trading in New York City accounted for 17.9%, and Tokyo accounted for 6.2%.All these developed countries already have fully convertible capital accounts. A number of emerging countries do not permit FX derivative products on their exchanges in view of controls on the capital accounts. The use of foreign exchange derivatives is growing in many emerging economies.Countries such as Korea, South Africa, and India have established currency futures exchanges, despite having some controls on the capital account. The foreign exchange market forex, FX, or currency market is a worldwide decentralized over-the-counter financial market for the trading of currencies. Financial centers around the world function as anchors of trading between a wide range of different types of buyers and sellers around the clock, with the exception of weekends. The foreign exchange market determines the relative values of different currencies.Forex Trading In US