$BTC
A coin pair (or trading pair) refers to two different cryptocurrencies that can be traded against each other on an exchange. For example:
BTC/USDT means you're trading Bitcoin (BTC) against Tether (USDT).
ETH/BTC means you're trading Ethereum (ETH) against Bitcoin (BTC).
The first coin is what you're buying or selling, and the second coin is what you're using to pay or receive in the trade.
