$BTC A pair in cryptocurrency trading are two assets that can be exchanged for each other, allowing users to compare spot prices between different cryptocurrencies. A trader will always consider a pair before changing one coin for another, making profits, or taking advantage of arbitrage opportunities.

A cryptocurrency pair like the BTC/USDT comprises the base currency, in this example, Bitcoin, and the quote currency, the USDT. Each coin often possesses various properties depending on liquidity, among other factors. A base currency in cryptocurrency trading is primarily the most liquid of the two. At the same time, the quote can be the altcoin with lower liquidity or a fiat currency like the USD, GBP, JPY, and more.