$BTC Cryptocurrency trading pairs are often represented with a set of three letters with a backslash such as AAA/BBB.

The base currency is the first cryptocurrency in a pair while the second is the quote currency.

The pairs work together to tell you how much of the quote currency is needed to equal 1 whole unit of the base currency. (Ex: If BTC is trading at $20,000 and ETH at $1000, ETH/BTC trade price will be displayed at ~.05 BTC)