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Some questions don’t happen once. “Will Bitcoin close higher than it opened?” is worth asking every five minutes, forever. On Calibri those are recurring series, and each round is a window.

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Series and windows

A series is a feed of markets generated from one question on a fixed cadence — every five minutes, hourly, daily. Each window is one round of it: its own market, its own order book, its own settlement. Because a five-minute feed produces 288 markets a day, the browse page shows the whole series as one card, not 288 — the card is the window open right now, and once it closes the next one takes its place. Filtering the browse page to a series shows that same live window on its own. Open it and you get the window strip: recent windows as a row you can step back through, the live one pulsing, a countdown to close, and the windows listed ahead.
Not every daily feed collapses. A tennis tour publishes a different fixture each day — those are genuinely different questions and each is listed in full. Only feeds that ask the same question each round collapse behind one card.

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Series vs tags

Two different ways markets are grouped, and they are not interchangeable:
  • A series is where an event came from — the feed that generated it. At most one per event, and most events have none at all.
  • A tag is where an event is shelved — what puts it on a hub page. An event can carry several. One “Wimbledon” tag can collect the winner race and every individual match, which come from completely different places.

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Price-feed markets

A recurring crypto window is a price-feed market: instead of plotting the market’s own probability, the chart plots the underlying asset’s price with the level to beat drawn across it. You get three views of a window:
  • Odds — the probability chart every market on the site has. This is what you are actually trading.
  • Price line — the asset’s price through the window, live.
  • Candles — hours of context around the window, scrollable into the past.
The live price comes from Calibri’s own feed, which is republished from the same venue the market settles against. That is deliberate: a chart fed from one source and a settlement taken from another disagree eventually, and every disagreement is somebody watching one number and being paid on another.

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What settles a window

A candle-direction window resolves on one question: did the candle close at or above its own open?
  • The open is fixed the moment the window starts. It is shown from the exchange’s own candle, not from the first price the chart happened to see — so arriving mid-window still shows you the real level to beat.
  • The close moves until the window ends, and it is the same number the resolution source compares against.
  • A tie resolves up. close == open exactly is a real outcome on a quiet five-minute market, not a rounding artefact, and the rule is stated rather than left to chance.
There is a short gap between a window closing by the clock and the final candle being confirmed. During it the displayed close is still forming. The app distinguishes the two states so you are never shown a “final” price that then moves.
Once settled, the window keeps the two numbers that decided it — the deciding candle’s open and close — so you can always see what happened, even months later. They are reproducible: anyone can re-request that candle and get the same values.
Settlement is final. If the exchange later restates its data, or there was an outage or an unusual print during the window, the market stays settled on what was published at the time. See How markets are resolved.

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Old windows still work

A window that closed three months ago renders exactly like a live one — its chart, its result, and its settlement figures. Bookmarks and shared links to old windows resolve.

Core concepts

Binary markets, prices as probabilities, settlement.

How markets are resolved

The exact Coinbase data a window settles on, and why it is never revised.

Market resolution

The on-chain escalation ladder and the deadman switch.

Fees

The single taker fee.

API Reference

Series, tags, and the underlying-asset price endpoints.