The foreign exchange market is an international network where traders involve in buying and selling currencies. The exchange rate of currencies is determined between countries, and transactions are physically completed. The main functions of foreign exchange markets are transferring purchasing power, provision for credits, and minimizing risk of foreign exchange. The transactions in foreign exchange market are classified in two categories: interbank or wholesale market and retail or client market. The transactions in foreign exchange market are undertaken either on spot or on forward or on swap basis.