Forex

Forex is a commonly used abbreviation for "foreign exchange", and it is typically used to describe trading in the foreign exchange market by investors and speculators.

This is similar to stock trading. A stock trader will buy a stock if they think its price will rise in the future and sell a stock if they think its price will fall in the future. Similarly, a forex trader will buy a currency pair if they expect its exchange rate will rise in the future and sell a currency pair if they expect its exchange rate will fall in the future.