Currency indices are a key tool for forex traders. They measure direct changes in the value of a currency against a basket of other currencies. This differs from a typical currency pair which only involves two currencies. For example, the US dollar index measures the value of the US dollar against a basket of currencies, including the euro, yen, pound sterling, Canadian dollar, Swiss franc, and Swedish krona.

Traders can use currency index CFDs to potentially find new trading opportunities beyond the usual currency pairs.