A currency pair in forex trading represents the quotation of two different currencies, showing how much of one currency (the quote currency) is needed to buy one unit of another currency (the base currency). For example, in the pair EUR/USD, the euro (EUR) is the base currency, and the U.S. dollar (USD) is the quote currency, meaning the price reflects how many dollars are required to purchase one euro. Currency pairs are categorized into majors, minors, and exotics, depending on their global trading volume and economic importance. Traders analyze currency pairs to speculate on exchange rate movements and profit from fluctuations in the forex market.