The trading pair is the main structure of any cryptocurrency exchange. It shows which two assets you can exchange for each other. For example, the BTC/USDT pair means you are trading Bitcoin against the stablecoin USDT. The first asset is the base currency (what you are buying or selling), and the second is the quote (what you are buying or selling for). It is important to understand that the choice of trading pair affects your strategy, liquidity availability, and profit potential. If you are trading altcoins, check if there is an available pair for USDT or BTC - this affects the ease of entering and exiting the market.