#TradingPairs101 A trading coin pair in crypto is when you trade one coin for another. For example, if you see $BTC/$USDT, it means you are trading Bitcoin (BTC) for Tether (USDT). The first coin (BTC) is what you are buying or selling, and the second coin (USDT) shows the price. If BTC/USDT is 30,000, it means 1 Bitcoin costs 30,000 USDT.