Why show the whole book instead of the majors?

Because the majors are where the least happens. The largest assets are the least volatile in percentage terms, so a list of them systematically hides the days biggest moves.

Does a big move mean something happened?

Not necessarily. On thin books a modest order can move the price a long way. Percentage change on its own says nothing about how much was actually traded.

Yes. It comes from Gemini's public price feed, key-free. Nothing is invented or simulated, and if the source cannot be reached the saver reports that instead of drawing something plausible.

Does it cost anything or need an account?

No. Every screensaver here is free, runs in the browser and needs no sign-up. This one uses a public API that requires no key.

What does a trading pair mean?

It is a market where one asset is exchanged for another, quoted as how much of the second you pay for one unit of the first.

What is the percentage on the display?

It is the change in the pair’s price over the past 24 hours, as reported in Gemini’s price feed.

Why can the same coin cost different amounts on different exchanges?

Each exchange has its own buyers and sellers, so prices can differ between venues. A price here is the level on Gemini only.

The Whole Book Screensaver

The Whole Book screensaver ranks every pair Gemini lists — several hundred of them — by how far each has moved in the last day. Most exchange displays show five majors; this shows the entire listed book. It runs in the browser with nothing to install; press ESC to exit.

How the The Whole Book screensaver works

The saver reads Gemini's public price feed, key-free.

No account and no key: the request goes straight from your browser, or from this site's own refreshed copy of the feed where the source does not permit browser access.

Values are drawn on a canvas that resizes with the window, so it works on a laptop or a wall display.

If the source is unreachable the saver says so on screen rather than showing stale numbers as though they were current.

Trading pairs on a regulated US crypto exchange

Gemini is a cryptocurrency exchange founded in 2014 by Cameron and Tyler Winklevoss and based in New York City. It holds a limited purpose trust charter from the New York Department of Financial Services, granted in October 2015. It lists trading pairs, each of which expresses the price of one asset in terms of another, usually a national currency or a stablecoin. A symbol such as BTCUSD means the price of bitcoin in US dollars.

Gemini’s public price feed returns, for each pair, the pair symbol, its current price on the Gemini order book and the percentage change in price over the past 24 hours. That is the figure this saver ranks by. Because the price is simply a level on this one exchange, not a global average, the same asset can trade at somewhat different prices elsewhere. Listing a pair does not endorse the asset, and the exchange can add or remove pairs over time.

A percentage move over 24 hours can look dramatic for a thinly traded pair, because a few orders are enough to shift its price. The data describe a market, not the assets’ fundamentals: a large move does not tell you why it happened. Crypto prices are volatile, and the display is informational and not financial advice or a recommendation to trade.

A worked example

Sixteen pairs sorted by the size of their move, up or down, with the percentage and current price alongside. The tail is the point: below the handful of names everyone recognises sit dozens of tokens that moved ten per cent this morning while nobody was looking. Pairs reporting exactly zero change are dropped, because a missing reading and a genuinely flat price are different things.

Settings & tips

Accent and Background recolour the display without changing the data.
Add it to a Multi-view grid to watch it alongside other live savers.
Press ESC at any time to leave fullscreen.

Frequently asked questions

Why show the whole book instead of the majors?: Because the majors are where the least happens. The largest assets are the least volatile in percentage terms, so a list of them systematically hides the days biggest moves.
Does a big move mean something happened?: Not necessarily. On thin books a modest order can move the price a long way. Percentage change on its own says nothing about how much was actually traded.
Is this real data?: Yes. It comes from Gemini's public price feed, key-free. Nothing is invented or simulated, and if the source cannot be reached the saver reports that instead of drawing something plausible.
Does it cost anything or need an account?: No. Every screensaver here is free, runs in the browser and needs no sign-up. This one uses a public API that requires no key.
What does a trading pair mean?: It is a market where one asset is exchanged for another, quoted as how much of the second you pay for one unit of the first.
What is the percentage on the display?: It is the change in the pair’s price over the past 24 hours, as reported in Gemini’s price feed.
Why can the same coin cost different amounts on different exchanges?: Each exchange has its own buyers and sellers, so prices can differ between venues. A price here is the level on Gemini only.

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