Foreign exchange trading which is most commonly known as Forex trading deals with buying and selling of currencies. Forex trading generally happens through an exchange and these exchanges facilitate exchange of currencies between the investors who are participating in the exchange deal from two different locations. These deals happen online and are traded at either at a pre-determined price or at current market price. Forex trading is the largest trading in the world after credit market trading. Various financial institutions and international banks are key participants of Forex trading.