Currency system couples

The exchange process occurs in any market, whether financial or non-market Mali, which is a swap of a good or service for a fixed amount of money. For example, in the stock market when you make a purchase 1,000 shares of Ford Motor Company price of one dollar per share, it will pay $ 1000 for a thousand shares. In the currency market, we buy the currency and pay in return other currency which we are buying one currency against another.
Based on this, the trading in the currency market be running couples, for example, if you decide to buy 1,000 euros will pay another currency for the euro, was the currency is the U.S. dollar, in this case, we have conducted the process of buying the EUR / USD ( EUR / USD)
There are eight currencies are traded mainly in the Forex currency They are divided into major and minor currencies as follows:
● major currencies (Major Currencies):
    U.S. dollar symbolized by the USD
    Euro symbolized by the EUR
    British Pound Sterling symbolized by the GBP
    Japanese Yen symbolized by the JPY
    Symbolized by the Swiss franc CHF
● Currency secondary (Minor Currencies):
    The Canadian dollar symbolized by the CAD
    Australian dollar denoted AUD
    New Zealand's dollar symbolized by the NZD
Because trading in the currency market always include the process of buying and selling currency other is up including trading known spouses system (Pairs), as the following examples:
(EUR / USD - GBP / USD - EUR / CHF - AUD / JPY)
The currency pair is divided into two parts:
    The first currency: called currency basis.
    Second currency: the currency is called the interview.
Each pair have expressed what exchange rate to be paid from the second currency (the counter currency) to buy one unit of the first currency (currency basis).
Example:
Note: to buy 1 euro, you should pay $ 1.3900
The currency pairs are divided into:
● key pairs (Majors):
It pairs consisting of the U.S. dollar with other currencies of major currencies, and these pairs are:
(EUR / USD - GBP / USD - USD / JPY - USD / CHF)
● secondary pairs (Minors):
 It pairs consisting of the U.S. dollar with another currency of currencies secondary Examples include:
(USD / CAD - AUD / USD - NZD / USD)
● pairs the (Crosses):
It pairs the U.S. dollar is a party and the exchange rate is a rate multiplied by a couple of major or minor couples Examples include:
(EUR / JPY - GBP / CHF - AUD / CAD)