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There is no single price
'The price of bitcoin' is a convenient shorthand, not a fact. There is a price on every venue, and the difference between them says more than any one of them alone.
When people say 'bitcoin costs so much', they imply one correct number exists somewhere. It does not. There is the Binance book, the Kraken book, the Upbit book — each with its own buyers and sellers, and a price that forms on its own. They are usually close, because anyone who profits from a gap closes it. But 'close' is not 'equal', and the moments when they visibly diverge are the most informative ones.
Why prices diverge
- Different participants: Korean venues are traded by one crowd, American ones by another, and their moods do not coincide.
- Different settlement currency: a price in won and a price in dollars are linked by an exchange rate that itself moves.
- Different liquidity: on a thin market one large order pushes price where a deep market would not go.
- Different rules: withdrawals may be closed, limits may apply — and arbitrageurs cannot level the difference.
What sixteen sources reveal
We collect from sixteen venues: Binance, Bybit, OKX, Gate, Bitget, KuCoin, MEXC, BingX, HTX, Kraken, Upbit, Coinbase, Coinbase International, Hyperliquid, plus Deriv and Yahoo for FX and commodities. Holding them at once is not about averaging. Averaging other people's prices does not produce a 'more correct' one — it produces a number that exists on no exchange and cannot be traded. The value is elsewhere: with sixteen points you can tell a market move from a single-venue move.
The key consequence: two different events look identical
On one exchange's chart a price spike looks the same in two entirely different cases. First: demand hit the whole market and every venue moved together. Second: a large order ate through one exchange's thin book while the rest stood still. From inside a single chart they cannot be told apart — yet they call for opposite decisions. That is why a multi-venue view is not a luxury: it answers a question you otherwise cannot ask.
Treating a price as 'wrong' because it differs
A common reaction: seeing a difference and deciding there is a data error somewhere. Differences between venues are normal and constant. They become an error only when nothing explains them: price stands still while everyone else has moved; a quote does not change for minutes; an instrument is delisted yet its price keeps being served. We catch such cases separately — a row's price is taken from a live contract, not from whoever has the largest historical turnover.
When a divergence is not a divergence
Before comparing two prices, make sure you are comparing the same thing. Spot and a perpetual future are different instruments, and the gap between them is called basis, not arbitrage. A contract for 1000 coins and a contract for one coin give prices differing by a factor of a thousand. A coin with the same ticker on two exchanges may be two different projects. The next lesson is entirely about this, because it is where mistakes happen most.
Live prices of one coin on every venue where it trades — on its page; the list of sources and their state — in the about section.
List of sourcesCollect the spread by hand
Take a mid-liquidity coin and write down its price on four venues at the same moment. Compute the difference between highest and lowest as a percentage. Repeat an hour later and in the evening. You will see the spread is not constant: it widens on moves and compresses in quiet hours. That is the first practical skill of this course.
A coin's price on one exchange has been 3% above the rest for two hours. What does that usually mean?
That something on that venue prevents the gap from closing: withdrawals for the coin are shut, the book is thin, local participants face restrictions, or simply nobody will move money between exchanges for this amount. A gap that persists for hours is almost always a sign of an obstacle rather than an opportunity: if it could be taken, it would already have been taken.