Crypto 101 Daily

The first time you open the trading screen on an exchange, you’re met with cryptic labels like “BTC/USDT” or “ETH/BTC.” These are trading pairs, and once you understand the idea, a lot of the intimidating trading interface suddenly makes sense. Here’s the plain-language explanation.

What a trading pair is

A trading pair is simply the two things you’re swapping between when you trade. Crypto isn’t bought and sold in isolation — it’s always traded against something else. “BTC/USDT” means you’re trading Bitcoin against a dollar-pegged stablecoin; “ETH/BTC” means trading Ethereum against Bitcoin. The pair tells you exactly what you’re giving and what you’re getting.

How to read one

The format is always “FIRST/SECOND.” The first item is the thing being bought or sold; the second is what it’s priced in. So in “BTC/USDT,” the price shown tells you how much USDT one BTC costs. If you buy that pair, you’re spending USDT to get BTC; if you sell, you’re giving up BTC to get USDT back. Once you see that pattern, every pair on the screen reads the same way.

Why pairs exist (and why it matters)

Pairs exist because a trade is always an exchange of one asset for another — there’s no “buying crypto” in the abstract, only swapping X for Y. This has a practical consequence beginners need to know: to trade a particular pair, you need to already hold the second asset. To buy a coin priced against a stablecoin, you need that stablecoin first; to trade a coin priced against Bitcoin, you need Bitcoin. This is why you sometimes have to make two trades to get where you want.

Common types of pairs

You’ll mostly see coins paired against a few common “base” assets: stablecoins (like a dollar-pegged coin), major cryptocurrencies (especially Bitcoin and Ethereum), and sometimes your local currency directly. For beginners, pairs against a stablecoin or your own currency are usually the simplest, because the price is shown in something whose value you intuitively understand — roughly dollars — rather than in “amount of Bitcoin.”

A practical tip

When starting out, prefer pairs priced in a stablecoin or your local currency so the numbers are easy to grasp. Be aware that the same coin can have several pairs with slightly different prices and liquidity, and that trading an obscure coin against another obscure coin can mean worse prices. Sticking to major, liquid pairs keeps things simpler and cheaper. This is education, not financial advice.

Key takeaways

A trading pair is the two assets you’re swapping — crypto is always traded against something else, never in isolation. Read it as “FIRST/SECOND”: the first is what you’re trading, the second is what it’s priced in. To trade a pair you must already hold the second asset, which is why you sometimes need two trades. For beginners, pairs priced in a stablecoin or your local currency are easiest to understand. This is education, not financial advice.

New here? This makes the trading screen clearer alongside the order book and market vs limit orders. The stablecoins often used as a base are explained in what is a stablecoin.