As noted above, all FOREX pairs are represented by a unique three letter foreign currency symbols. The top eight most actively traded of these currencies (4 most traded listed first) and their codes are:

Euro (EUR) U.S Dollar (USD British Pound (GBP) Japanese Yen (JPY) Swiss Franc (CHF) Canadian Dollar (CAD) Australian Dollar (AUS) New Zealand Dollar (NZD)

The most actively traded major currency pairs and currency codes (the 3 most traded listed first)are:

Euro / US Dollar (EUR/USD) US Dollar / Japanese Yen (USD/JPY) British Pound / US Dollar (GBP/USD) US Dollar / Swiss Franc (USD/CHF) Euro / British Pound (EUR/GBP) Euro / Japanese Yen (EUR/JPY) Euro / Swiss Franc (EUR/CHF) Australian Dollar / US Dollar (AUD/USD) US Dollar / Canadian Dollar (USD/ CAD) New Zealand Dollar / US Dollar (NZD/USD)