In the cryptocurrency market, the 'trading pair' is the basic unit of trading, referring to the exchange relationship between two assets. For example, BTC/USDT indicates trading Bitcoin (BTC) for Tether (USDT). The first asset is the 'base currency', and the second is the 'quote currency', with the price representing the value of one unit of the base currency.

Choosing the right trading pair not only affects trading liquidity but also relates to conversion costs and potential arbitrage opportunities. Common trading pairs include ETH/BTC, SOL/USDT, etc., while some platforms also offer fiat currency trading pairs such as BTC/USD.