Forex is often traded in pairs, for example USD/Euro, USD/JPY, Euro/JPY, GBP/CHF, and CAD/USD. You get 'short' in one currency and you will get 'long' in the other one. Unlike conventional stocks market, Forex trading does not have a centralized trade market. It is considered as Over-the-Counter or Inter-bank as trades are done between two counterparts via electronic network or telephone connections. Forex works truly as a 24-hour market.