#TradingPairs101 On exchanges, we trade crypto pairs, which means we’re swapping one coin for another. The most common pairs are against USDT or BTC – like BTC/USDT, ETH/USDT, or DOGE/BTC. What’s interesting is that the same coin can have different prices depending on what you're trading it against. For example, ADA/USDT might have a different price than ADA/BTC due to supply and demand differences.