Unlike the stock exchange, the Forex Market (foreign exchange market) is a relatively new player to the investment world. Today's current Forex market model started in the early 1970's, and today it represents the biggest financial market around, even surpassing the stock market. With trading surpassing $2 trillion dollars per day, the Forex market attracts more and more investors all the time. Before an investor starts trading on the Forex market, he should grasp the fundamentals of how exchange rates work.
Exchange rates
Basically, the exchange rate represents the rate of exchange between two currencies. Most currencies are traded, or paired up against the dollar. The five most common currencies traded on the market are the dollar (USD), euro (EUR), the yen (JPY), the British pound (GBP), and the Swiss franc (CHF). Some other currencies that are traded are the Australian dollar, the Canadian dollar, and the Hong Kong dollar.
In the exchange rate or ratio, the numerator represents the quote currency and the denominator the base currency, which always equals one.