The $ETH coin pair refers to trading Ethereum (ETH) against another currency, typically a fiat currency like the US Dollar (USD) or another cryptocurrency like Bitcoin (BTC). ETH is one of the most widely traded cryptocurrencies, offering a platform for decentralized applications and smart contracts. The ETH/USD pair is popular among traders, allowing them to speculate on Ethereum's price movements. Other pairs like ETH/BTC enable traders to compare the value of Ethereum against Bitcoin. Trading ETH pairs can provide opportunities for profit, but it involves risk due to cryptocurrency market volatility. Traders use technical analysis and market news.