How it works
You draw where a coin's price goes over the next round. When the round ends, your line is scored against the real chart and against every other drawing of that round.
Rounds
- Next hour: the next clock hour, for example 15:00–16:00 UTC. It locks at 15:00. Your line is read at 12 points, every 5 minutes (15:05, 15:10 … 16:00).
- Next day: the next UTC day, 00:00–24:00 UTC. It locks at 00:00 UTC. Your line is read at 24 points, every hour.
- Coins: BTC, ETH, SOL and HYPE.
- Your line is the move from the price at the lock, in %. The price at the lock is not known while you draw: it is the close of the 1-minute candle that ends exactly at the lock.
- One drawing per round per browser. Redraw as often as you like until the lock. A line that reaches the server after the lock goes to the next round, and the page tells you so. The server's clock decides.
- After the lock the real price traces over your line, refreshed every minute, with the crowd's mean line behind it. The crowd line is shown only after the lock, so nobody can copy it.
The score
score = 100 × max(0, 1 − mean |your point − the real point| ÷ max(real range, floor))
- Your point and the real point: the % move from the lock price at each of the 12 (or 24) times. The real point is the close of the candle that ends at that time.
- Real range: the highest minus the lowest of the real points, the lock included (0%). Dividing by it means a line is judged against how much the price actually moved, so a quiet hour is not scored like a wild one.
- Floor: on the quietest rounds the range is replaced by a floor, so a tiny wobble does not turn every drawing into a 0. The floor is the 25th percentile of each coin's real range over the 17 days before 14 November 2026: it applies to about one round in four.
| Floor | BTC | ETH | SOL | HYPE |
|---|---|---|---|---|
| Next hour | 0.23% | 0.31% | 0.41% | 0.58% |
| Next day | 1.46% | 1.71% | 2.20% | 3.48% |
What to expect, from the same 17 days of BTC hours: a flat line scores about 65 in a typical hour, a straight line to the right end point about 78, and a straight line in the wrong direction about 41. The best lines get the shape right, not only the end.
While a round races, the page shows a score so far: the same formula over the points that have passed.
Your place and the crowd
- When a round ends, every drawing of it is scored at once and the scores are kept.
- Better than X% of N drawings: the share of the round's N drawings, yours included, with a lower score than yours, rounded down.
- The crowd line: the mean of all the round's drawings at each point.
- Streak: consecutive UTC days on which this browser drew at least once.
What it cannot do
- It cannot stop a script from sending many lines from many browsers. Your place is for you; nothing is at stake, and there is no named leaderboard.
- Prices are Hyperliquid's perpetual prices, not spot prices on another venue. They track spot closely but are not the same.
- No replays of past days, on purpose: the game is about what has not happened yet.
- A round that nobody opens for more than 17 days after it ends can no longer be scored: the price source keeps the latest 5,000 candles per interval.
- Your drawings are tied to a random id kept in your browser. Clear the site's data and the page forgets which lines were yours (their links keep working).
Privacy
No sign-up and no trackers. The site stores your drawing, the random id's hash, and a hash of your connection's address salted per day (the salt is deleted after two days), used only to limit abuse and to count visitors once a day.
Data
Data: Hyperliquid (not affiliated): 1-minute and 5-minute candles from its public info endpoint, cached for a minute.