Currency trading has a long history and can be traced back to the ancient Middle East and Middle Ages when foreign exchange started to take shape after the international merchant bankers devised bills of exchange, which were transferable third-party payments that allowed flexibility and growth in foreign exchange dealings.

The modern foreign exchange market characterized by periods of high volatility (that is a frequency and an amplitude of a price alteration) and relative stability formed itself in the twentieth century. By the mid-1930s the British capital London became to be the leading center for foreign exchange and the British pound served as the currency to trade and to keep as a reserve currency. Because in the old times foreign exchange was traded on the telex machines, or cable, the pound has generally the nickname “cable”.

After the World War II, where the British economy was destroyed and the United States was the only country unscarred by war, U.S. dollar, in accordance with the Breton Woods Accord between the USA, Great Britain and France (1944) became the reserve currency for all the capitalist countries and all currencies were pegged to the American dollar (through the constitution of currencies ranges maintained by central banks of relevant countries by means of the interventions or currency purchases). In turn, the U.S. dollar was pegged to gold at $35 per ounce. Thus, the U.S. dollar became the world's reserve currency. In accordance with the same agreement was organized the International Monetary Fund (IMF) rendering now a significant financial support to the developing and former socialist countries effecting economical transformation.

To execute these goals the IMF uses such instruments as Reserve trenches, which allows a member to draw on its own reserve asset quota at the time of payment, Credit trenches drawings and stand-by arrangements. The letters are the standard form of IMF loans unlike of those as the compensatory financing facility extends financial help to countries with temporary problems generated by reductions in export revenues, the buffer stock financing facility which is geared toward assisting the stocking up on primary commodities in order to ensure price stability in a specific commodity and the extended facility designed to assist members with financial problems in amounts or for periods exceeding the scope of the other facilities.