What does it mean have a ’long’ or ’short’ position?

In trading parlance, a long position is one in which a trader buys a currency at one price and aims to sell it later at a higher price. In this scenario, the investor benefits from a rising market. A short position is one in which the trader sells a currency in anticipation that it will depreciate. In this scenario, the investor benefits from a declining market. However, it is important to remember that every FX position requires an investor to go long in one currency and short the other.