In Forex market different types of traders involved. Many of them engage in the market only to make easy profit without knowing the common rules. So everyone should know the rules before trading.
Forex is operated in pair. A pair is simply a combination of two types of currency. For example, if you wanted to trade Euros for United States Dollars, the pair would simply be EUR/USD. In FX market there are some pairs called majors. They are majors because they are so easily and often trade in the Forex market.