The trading pair #交易对 #交易对 refers to a combination of two assets used for buying and selling in financial markets, typically expressed as A/B, indicating the purchase of asset A with asset B. For example, in the cryptocurrency market, BTC/USDT indicates the purchase of BTC with USDT. Trading pairs are the basis for asset exchange, and different trading pairs provide various market options and price discovery mechanisms. Investors use trading pairs for asset allocation, arbitrage, or speculative operations. The variety and number of trading pairs offered by exchanges directly impact market liquidity and trading activity.