$BTC A trading pair is when two cryptocurrencies can be traded against each other, as opposed to a cryptocurrency and fiat. For example, BTC/LTC, or ETH/DOGE. In order to acquire the one, the other will need to be exchanged. In this case, the base currency is now a cryptocurrency.

Crypto trading pairs are asset combinations on exchanges that allow users to swap one cryptocurrency for another. The base currency is the first asset in the pair, representing what users buy or sell, while the quote currency is the second asset, indicating its price in terms of the base currency.