Open two crypto sites and you will often see two different prices for the same coin. Neither is broken. The usual explanation — “different exchanges, different prices” — is true and explains almost nothing, because it does not say why the gap is a cent on one asset and four dollars on another at the same moment.
The gap is not noise. It is a measurement, and once you know what it measures it is more useful than the price it sits beside.
The same coin, the same second, five venues
Sampled together, inside two seconds:
| Asset | Kraken | Coinbase | Gemini | Bitstamp | CoinGecko | Spread |
|---|---|---|---|---|---|---|
| Bitcoin | 78,410.50 | 78,410.04 | 78,418.64 | 78,414.44 | 78,443.00 | 0.042% |
| Zcash | 1,167.03 | 1,167.54 | 1,167.83 | 1,166.68 | 1,162.88 | 0.426% |
| Stellar | 0.1889 | 0.1888 | — | 0.1889 | 0.1888 | 0.053% |
Bitcoin’s four exchanges are within about eight dollars of each other on a seventy-eight-thousand dollar asset. That is not a market that disagrees. That is four order books being held together by people whose entire job is to buy the cheap one and sell the dear one until there is nothing left in it.
Zcash is ten times wider. Same instant, same method, same venues.
Price is not a number the market has
The reason the question has no clean answer is that an exchange does not hold a price. It holds an order book: a list of what people will pay, and a list of what people will accept. The highest offer to buy is the bid. The lowest offer to sell is the ask. Nothing has to happen in between, and often nothing does.
What gets published as “the price” is simply the last trade that occurred somewhere between them. It is a historical fact about one transaction, not a statement about what the thing is worth.
Sampled at the same moment:
| Asset | Venue | Bid | Ask | Bid–ask |
|---|---|---|---|---|
| Bitcoin | Coinbase | 78,417.87 | 78,417.88 | 0.000% |
| Bitcoin | Kraken | 78,410.40 | 78,410.50 | 0.000% |
| Zcash | Coinbase | 1,166.22 | 1,166.62 | 0.034% |
| Zcash | Kraken | 1,165.85 | 1,166.68 | 0.071% |
| Cosmos | Coinbase | 1.6953 | 1.6969 | 0.094% |
| Cosmos | Kraken | 1.6946 | 1.6968 | 0.130% |
Bitcoin’s bid and ask on Coinbase were one cent apart on a $78,000 asset. For practical purposes there is one price, because the distance between buying and selling it is nothing.
Cosmos on Kraken was 0.130% apart. Which is the number worth pausing on:
3×
Cosmos’s bid–ask spread on a single exchange was three times wider than the entire disagreement between five different venues on Bitcoin. The gap inside one thin market beats the gap between five liquid ones.
That is the whole mechanism. A spread is what a market maker charges for standing between a buyer and a seller, and the charge rises with the risk of being left holding the asset. Bitcoin is easy to lay off in a second, so the charge rounds to zero. Cosmos is not, so it does not.
Why the aggregate is the odd one out
Look again at the Zcash row. Four exchanges cluster between 1,166.68 and 1,167.83. CoinGecko sits at 1,162.88 — below every single one of them, by about four dollars.
That is not an error, and it is not lag in the naive sense. An aggregate is a volume-weighted average across many venues, and “many” includes markets you would never trade on: smaller exchanges, other quote currencies, pairs where the last trade happened minutes ago. Blend a live number with a stale one and you get a number that is behind the live ones — systematically, not randomly.
- Bitcoin, five venues
- 0.042%
- Stellar, four venues
- 0.053%
- Zcash, five venues
- 0.426%
Highest venue against lowest, as a percentage of the lowest. Sampled together on 8 September 2026 and complete within two seconds.
So an aggregate is not a worse price than an exchange’s. It is an answer to a different question. The exchange answers “what did this last trade for, here”. The aggregate answers “what is this worth across the market, roughly, weighted by where it trades”. For a market capitalisation you want the second. For anything you are about to actually do, you want the first — from the venue you would do it on.
Zcash is wide for a reason you can see
Zcash is not obscure. It has a US spot ETF and it has traded up roughly 2,500% over the year. So why is it ten times wider than Bitcoin?
Because the float is thin and getting thinner. The share of supply held in shielded addresses went from about 8% in 2024 to over 30%, which removes coins from the order books that price it — the same mechanism covered in what crypto to buy this month. Add a violent trend, and market makers widen further: quoting a fast-moving asset is riskier, and the spread is the fee for that risk.
Both effects push the same way. A rally in a thinning asset is exactly the condition under which the number you see and the number you get diverge most.
What to do with this
Stop comparing prices across sites and expecting them to match. They are not supposed to. A figure in an article is a dated snapshot from the source that article names; a figure in a live panel is one venue’s last trade. Ours say which, and when — the crypto heatmap carries its venue and timestamp beside the numbers for exactly this reason.
Read the spread before you size a position. A 0.13% bid–ask means a round trip costs you 0.13% before fees, before slippage, and before the market moves. On a position you intend to exit in a hurry, that is the number that decides whether the exit exists at the price you planned on. It is also, usefully, free to check: the bid and ask are public on every venue.
Treat a widening gap as information. When an asset’s spread widens against its own history, liquidity is leaving. That happens before a price move often enough to be worth watching, and it is visible to anyone who looks.
What this does not tell you
A snapshot is a snapshot. These spreads were taken on one ordinary afternoon; in a crash every number here widens, and the assets that widen most are the ones you most want to sell. Nothing above predicts direction, and a tight spread is not a safe asset — Bitcoin can be efficiently priced all the way down.
It also does not cover the venues that matter most to some readers: decentralised exchanges price differently again, through pools rather than order books, and that is a different mechanism with a different failure mode.
Educational analysis of market mechanics, not financial advice. Spreads and prices change constantly; every figure here is a snapshot of one moment.