How Crypto Markets Work

Crypto markets are a network of independent trading venues — centralized exchanges, decentralized exchanges, and over-the-counter desks — where buyers and sellers meet through order books or automated pricing formulas. There is no opening bell, no central exchange, and no official price: the number you see on a coin page is an aggregate of the last trades across many venues. Understanding how those venues actually match trades is the foundation for everything else in trading.

The order book: where price comes from

On a centralized exchange like Coinbase, Kraken, or Binance, every market (say, BTC/USD) is organized around an order book. It is simply two lists:

Bids — orders from people willing to buy, each with a price and a quantity, sorted from highest price down.
Asks (or offers) — orders from people willing to sell, sorted from lowest price up.

The highest bid and the lowest ask never overlap; the gap between them is the spread. When someone submits an order that crosses the spread — a buyer willing to pay the lowest ask, or a seller willing to accept the highest bid — the exchange's matching engine pairs them off and a trade prints. That trade price becomes the new last price, which is what tickers and charts display.

This means price is not set by the exchange or by any authority. It moves because orders on one side get consumed faster than they are replenished. If aggressive buyers keep lifting the asks, the lowest remaining ask keeps climbing, and the chart goes up. Price is the running record of where the two sides last agreed.

Makers, takers, and market makers

Every trade has two roles. The maker placed a resting order that sat in the book waiting. The taker submitted the order that matched against it. Exchanges usually charge takers a higher fee than makers — often something like 0.10% taker versus 0.00-0.08% maker on a mid-tier account — because resting orders provide the liquidity that makes the market usable.

Professional market makers take this to scale. They are firms that continuously quote both a bid and an ask in a market, earning the spread many times a day while managing the risk of holding inventory. In a liquid pair like BTC/USDT on a major exchange, market makers are the reason you can buy $5,000 of bitcoin at almost exactly the displayed price at 3 a.m. on a Sunday. In a small altcoin pair, there may be only one or two makers with thin quotes — or none — and that difference is what separates a liquid market from an illiquid one.

Market makers are not doing you a favor; they profit from the spread and from fee rebates. But their presence tightens spreads and dampens small price gaps, which benefits everyone who trades.

Decentralized exchanges price differently

Decentralized exchanges (DEXs) such as Uniswap mostly do not use order books. Instead, an automated market maker (AMM) holds a pool of two tokens and quotes prices from a formula based on the ratio of the pool's reserves. Your trade executes against the pool, and the price moves along the formula's curve as you trade — the larger your trade relative to the pool, the worse your average price.

For a beginner, the practical implications are: DEX prices track centralized-exchange prices because arbitrage traders profit from closing any gap, DEX trades settle on-chain and cost gas, and the deep mechanics of AMMs belong to a separate topic. What matters here is that both systems answer the same question — at what price will someone take the other side of your trade right now?

One asset, many venues, one (approximate) price

Bitcoin trades simultaneously on dozens of exchanges, in multiple quote currencies. Prices on these venues rarely diverge by much, and the reason is arbitrage: if BTC trades at $64,950 on one exchange and $65,050 on another, a trader can buy on the cheap venue and sell on the expensive one, pocketing the difference. That buying and selling pressure pushes the two prices back together within seconds. Arbitrage firms with fast systems do this continuously, which is why global crypto prices stay glued together despite there being no central exchange.

Small persistent differences do exist. They reflect real frictions: withdrawal times, fees, banking access in a given country, and counterparty risk of the venue itself. A famous historical example is the so-called kimchi premium, where bitcoin repeatedly traded meaningfully higher on South Korean exchanges than elsewhere because capital controls made the arbitrage hard to complete.

Aggregator sites compute an index price — typically a volume-weighted average across major exchanges — and derivatives platforms use similar indexes for settlement. When you see one number quoted as the price of bitcoin, that is what you are looking at: a blend, not a single market.

What 24/7 trading changes

Stock markets close nightly and on weekends; crypto never does. This has real consequences beyond convenience:

No closing price. Daily candles are a convention (most platforms use 00:00 UTC), not a market event. Different data providers can show slightly different daily candles.
Weekend liquidity is thinner. Many trading firms scale back staffing and risk outside weekday hours, so books are shallower and the same size order moves price more. Sharp weekend moves that partially retrace on Monday are a recurring pattern — not a rule you can trade mechanically, but a liquidity reality worth knowing.
News hits an open market. There is no overnight gap where you are simply stuck; price adjusts continuously. That cuts both ways — you can always react, but so can everyone else, instantly, and your positions are exposed while you sleep.
It is a marathon hazard. Markets that never close invite traders to never stop watching. Sustainable participation requires deciding in advance when you trade and when you do not.

Why this matters before you place a trade

Everything practical about trading flows from this structure. Fees differ by whether you take or provide liquidity. The price you actually pay depends on how deep the book is at that moment, not on the ticker. Small-cap coins move violently partly because their books are thin, not only because sentiment is fickle. And no single venue's price is the truth — it is one node in a network kept in sync by arbitrage.

The next guides in this path build directly on these mechanics: the order types you can submit, how to read the book itself, and how liquidity and slippage determine your real execution cost.

Key Takeaways

Price on an exchange is simply the last match between the highest bidder and the lowest seller in an order book — no authority sets it.
Makers provide resting liquidity and usually pay lower fees; takers consume it and pay more.
Arbitrage traders keep prices nearly identical across dozens of independent venues; the quoted price of a coin is an aggregate, not a single market.
DEXs replace order books with liquidity-pool formulas, but arbitrage ties their prices to the rest of the market.
24/7 trading means no official close, thinner weekends, and constant exposure — plan when you trade instead of watching always.