EUR/USD is the most liquid and the most popular currency pair among the forex traders. Trading currencies can be exciting and lucrative. Its a great market because of the way politics affect the trends. Elections, strikes, and sudden developments, both good and bad, can lead to significant trading profits if you stand ready to trade the euro is a convenient currency because it encompasses the policies and the economic activity and political environment of a volatile but predictable part of the world: Europe. EUR/USD is the most heavily traded currency pair in the global currency markets at the moment.