A currency pair expresses the price of one currency in relation to another. The first currency listed is the base currency, while the second is the quote currency. In practical terms, the pair shows how much of the quote currency is required to buy one unit of the base currency.
On an exchange, that structure determines how trades are executed. If a user wants to buy a cryptocurrency, the user needs to sell the quote currency in that trading pair. For first-time buyers, that quote asset is often a national fiat currency. Orders can be placed at the market price for immediate execution, or entered at a chosen price and left open until matched. Selling works the same way, either through market execution or a limit order set by the trader.
Two Main Categories of Pairs in the Crypto Market
The source breaks crypto market pairs into two broad groups. The first is crypto-to-fiat. A common example is BTC/USD, which shows the price of Bitcoin in US dollars. The second is crypto-to-crypto. A widely used example is ETH/BTC, which reflects the value of Ether measured in Bitcoin.
Exchanges do not create direct trading pairs for every asset combination. The article points out that many cryptocurrencies lack enough market demand to support direct exchange against one another, so those pairs are not listed. In most crypto-to-crypto markets, the quote side is concentrated in a smaller set of major assets, typically BTC, ETH, USDT, and in some cases an exchange token.
Why Stablecoin Pairs Matter
The article notes that crypto-to-stablecoin pairs can be useful for traders who track performance in fiat terms. Since stablecoins offer functionality similar to fiat currencies, they are often used as a pricing bridge inside crypto markets. That makes them a common reference point for users moving between volatile digital assets and a more stable unit of account.
How CEX.IO Organizes Its Markets
Using CEX.IO as an example, the source says users can open the Trade section to view different categories of available pairs. On that page, crypto-to-fiat markets include quote currencies such as USD, EUR, and GBP. Crypto-to-crypto markets include pairs quoted in BTC, ETH, and USDT. The platform groups these markets by category, making it easier for users to find pairs based on the asset used for pricing.
The original article also includes a risk notice stating that the information is for informational purposes only, does not constitute investment or financial advice, and that digital assets involve risk. Readers are encouraged to do their own research and seek professional advice where needed.