The eight most frequently traded currencies (USD, EUR, JPY, GBP, CHF, CAD, NZD and AUD) are called the major currencies. All other currencies are referred to as minor currencies. Do not worry about the minor currencies, they are for professionals only. Actually, on this site we’ll mostly cover what we call the Fab Five (USD, EUR, JPY, GBP, and CHF). These pairs are the most liquid and the most sexy.
The base currency is the first currency in any currency pair. It shows how much the base currency is worth as measured against the second currency. For example, if the USD/CHF rate equals 1.6350, then one USD is worth CHF 1.6350. In the Forex markets, the U.S. dollar is normally considered the “base” currency for quotes, meaning that quotes are expressed as a unit of $1 USD per the other currency quoted in the pair. The primary exceptions to this rule are the British pound, the Euro, and the Australian and New Zealand dollar.
The quote currency is the second currency in any currency pair. This is frequently called the pip currency and any unrealized profit or loss is expressed in this currency.
A pip is the smallest unit of price for any currency. Nearly all currency pairs consist of five significant digits and most pairs have the decimal point immediately after the first digit, that is, EUR/USD equals 1.2538. In this instance, a single pip equals the smallest change in the fourth decimal place – that is, 0.0001. Therefore, if the quote currency in any pair is USD, then one pip always equal 1/100 of a cent.
One notable exception is the USD/JPY pair where a pip equals $0.01.