HOW TO READ A CURRENCY QUOTE

Before trading currencies an investor has to understand the basic terminology of the forex market, including how to interpret forex quotes. In every foreign exchange transaction an investor is simultaneously buying one currency and selling another. These two currencies make up a currency pair. This is an example of a foreign currency exchange rate of the dollar versus the yen:
USD/JPY = 119.72
The currency to the left of the slash ("/") is called the base currency (in this example, the US dollar) and the one on the right is called the quote currency or counter currency (in this example, the Japanese Yen). This notation means that 1 unit of the base currency (that is, 1 dollar) is equal to 119.72 Japanese Yen. If buying, the exchange rate specifies how much you have to pay in units of the quote currency to buy one unit of the base currency; in the above example, you have to pay 119.72 yen to buy 1 US dollar. If selling, the foreign currency exchange rate specifies how much units of the quote currency you get for selling one unit of the base currency; in the above example, you will receive 119.72 Japanese Yen when you sell 1 US dollar.
As with stocks, a forex quote includes a bid price (or bid) and an ask price (or ask). This can be easily illustrated with an example of a currency quote taken from the forex trading software:
In the above example, the bid price is 119.68 yen and the ask price is 119.75 yen [notice that when the ask price is displayed, only the last two decimal places are displayed to the right of the slash (75 instead of 119.75)]. The bid price is the price at which dealers are willing to buy the base currency (in units of the quote currency) and users of our software can sell. Thus, if a trader presses the button "Sell USD," he/she would sell dollars at 119.68 yen. The ask price, on the other hand, is the price at which dealers are willing to sell the base currency and users of our system could buy it. By clicking "Buy USD," an investor would be buying dollars at 119.75 yen.
Even though there are many currencies all over the world, 85% of all daily transactions involve trading a group of currencies known as the "Majors." These currencies include the US Dollar, Japanese Yen, Euro, British Pound, Swiss Franc, Canadian Dollar and Australian Dollar. The four most actively traded currency pairs are the US Dollar / Japanese Yen (USD/JPY), Euro / US Dollar (EUR/USD), British Pound / US Dollar (GBP/USD), and the US Dollar / Swiss Franc (USD/CHF). The US Dollar / Canadian Dollar (USD/CAD) and the Australian Dollar / US Dollar (AUD/USD) are also actively traded pairs. For traders, the best trading opportunities are with the most commonly traded (and therefore most liquid) currencies; i.e., the "Majors."
The examples below were taken from the currency dealing system which provides forex real time quotes. From left to right are the euro-dollar exchange rate, the british pound-dollar exchange rate, and the dollar-swiss franc exchange rate. All of these currency quotes are of major currency pairs.
Taking the example of the euro forex quote (first pair above), buying one euro would cost 1.0099 US dollars and selling would provide 1.0093 US dollars.