$ETH An ETH pair is any trading pair that involves Ethereum. It usually appears as:

ETH/USDT – Ethereum traded against Tether (a stablecoin).

ETH/BTC – Ethereum traded against Bitcoin.

ETH/SOL – Ethereum traded against Solana.

ETH/BNB, ETH/XRP, etc.

In each pair:

The first coin (ETH) is what you're buying or selling.

The second coin is the currency used to price the first.