what are exchange rates used for
Definition. Rate at which one currency may be converted into another. The exchange rate is used when simply converting one currency to another (such as for the purposes of travel to another country), or for engaging in speculation or trading in the foreign exchange market.here are a wide variety of factors which influence the exchange rate, such as interest rates, inflation, and the state of politics and the economy in each country. also called rate of exchange or foreign exchange rate or currency exchange rate.