What Is a Crypto Exchange?

A crypto exchange is a marketplace where people buy, sell, and trade cryptocurrencies. It plays the same role a stock exchange plays for shares: it matches buyers with sellers and sets a price based on what people are willing to pay. Almost everyone who owns crypto touched an exchange to get it.

How an exchange works

At its core, an exchange keeps an order book, a running list of buy orders and sell orders. When your buy order matches someone's sell order, a trade happens and the price updates. The last price two people agreed on is "the price" you see quoted. Because this depends entirely on supply and demand with no earnings behind it, prices can move violently, which is why crypto is so volatile on a chart.

Centralized vs decentralized

There are two broad types, and the difference matters a lot for safety:

• Centralized exchanges (CEXs) are run by a company. They hold your funds, handle the order book, and require identity verification. They are easier for beginners but you are trusting a business to stay solvent and secure. In Canada, platforms serving residents are expected to be registered with securities regulators.
• Decentralized exchanges (DEXs) are apps built on a blockchain that let people trade directly from their own wallets using smart contracts, with no company holding funds. They give you more control but expose you to bugs, scams, and mistakes with no support desk to call. Many rely on a liquidity pool instead of an order book.

Custody: the big risk

On a centralized exchange, your coins usually sit in the company's custody, not in a wallet you control. That convenience is also the danger. If the exchange is hacked, mismanaged, or fraudulent, your funds can vanish. History is full of examples, from the Mt. Gox collapse to the FTX collapse, where users lost enormous sums held on exchanges.

Fees and spreads

Exchanges make money through trading fees (a small percentage per trade), the spread (the gap between the buy and sell price), and withdrawal fees. Beginner-friendly apps often hide a wide spread instead of showing an obvious fee, so the "free" trade is not free. Comparing costs before you trade is worth the few minutes.

Trading pairs and liquidity

On an exchange, coins are quoted against each other in trading pairs, such as BTC to CAD or ETH to BTC. How easily you can trade without moving the price is called liquidity. Big coins are highly liquid; obscure altcoins can be nearly impossible to sell at a fair price, which is a trap for beginners chasing small tokens.

Choosing and using one safely

Favour a platform that is registered to operate where you live, be honest that no exchange is risk-free, and never leave more on one than you are willing to lose to a hack or failure. If you plan to buy in Canada, our how to buy crypto in Canada guide covers the practical steps. To see real coins and live prices, visit our crypto home, and use the AI chart reader to get a plain-English read on any chart.