All the variety of world currencies as well as various derivatives on currencies that exist today can be attributed to the tools of the foreign exchange market. The main instruments for trading in the foreign exchange market are the currencies of different countries. Exchange rates i.e. their relationship to the US dollar (or other currencies) is formed under the influence of market supply and demand, as well as many fundamental factors. At the same time, highly liquid freely convertible currencies are usually involved in trading on the Forex market.