EUR/USD is the most liquid currency pair in the currency markets. There are four currency pairs that are known as the major currency pairs namely EUR/USD, GBP/USD, CHF/USD and JPY/USD that are heavily traded in the global currency markets. The rest of the currency pairs dont have the liquidity to trade big volumes as these four pairs do. Almost like 90% of the global currency exchange is in these pairs. Out of these four pairs, EUR/USD has the most liquidity and is the most popular among the currency traders all over the world. EUR/USD is the most heavily traded currency pair in the global currency markets at the moment. Most of the currency traders are in fact speculators. 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 EUR/USD is a convenient currency pair because it encompasses the policies and the economic activity and political environment of a volatile but predictable part of the world: Europe.
Read more on EUR/USD