Bitcoin Up or Down - October 19, 5:15PM-5:30PM ET
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Bitcoin Up or Down - October 19, 5:15PM-5:30PM ET
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AI Analysis
Trader mode: Market mechanics, assumptions and risks
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Reported volume · provider units
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Saved contracts
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Reviewed equivalent pairs
Source snapshot: Oct 19, 2026, 3:00 AM UTC
About This Event
This market will resolve to "Up" if the time-weighted average price (TWAP) of Bitcoin, generated by Chainlink, of the time range specified in the title is greater than or equal to the price at the beginning of that range. Otherwise, it will resolve to "Down". The resolution source for this market is information from Chainlink, specifically the BTC/USD TWAP data stream available at https://data.chain.link/streams/btc-usd-twap-60s-streams. Please note that this market is about the price according to the TWAP Chainlink data stream for the asset pair BTC/USD, not according to any other sources or spot markets.
Snapshot observed 2026-10-19T00:00:05.826Z. This analysis describes that snapshot and is not a live news update.
What the contract measures
This snapshot covers one Polymarket event, "Bitcoin Up or Down - October 19, 5:15PM-5:30PM ET" [1]. The source states that the market resolves to "Up" if the time-weighted average price (TWAP) of Bitcoin, generated by Chainlink, of the time range specified in the title is greater than or equal to the price at the beginning of that range. Otherwise it resolves to "Down" [1]. The source also says the market concerns "the price according to the TWAP Chainlink data stream for the asset pair BTC/USD, not according to any other sources or spot markets" [1]. A reader comparing this with another Bitcoin contract should check whether that contract uses the same data stream, time window, and comparison rule, since these details define what the outcome means.
The listed end time is 2026-10-19T21:30:00.000Z [1]. The title's window is 5:15PM to 5:30PM ET, so readers should confirm that the listed end time matches the intended window in their own time zone.
Reading the snapshot
The saved market shows two outcomes: "Up" at 0.505 and "Down" at 0.495 [1]. These are snapshot prices from the provider record, not executable quotes or verified probabilities. The prices were observed at 2026-10-19T00:00:05.826Z, and the source was retrieved at 2026-10-19T01:21:50.434Z [1]. The observation therefore predates the retrieval by about 81 minutes. Neither timestamp shows what prices are now.
The sample includes one market, and the coverage record marks it as complete for the saved event, with no partial sample [1]. The sample warning states that this "does not establish that the providers list every possible real-world outcome" [1]. Because this is a binary contract, the two prices describe the two outcomes in this single event only.
Volume is not included in this interpretation. A higher quoted price for "Up" describes only that snapshot and does not indicate why the price was set or how many participants hold a view.
What remains uncertain
The evidence does not show prices after the observation time, the Bitcoin price at the start of the window, or the final TWAP. It does not establish the resolution outcome, which depends on the Chainlink data after the listed end time. The evidence also does not explain any movement in price or compare this contract with any other platform's Bitcoin contract. Differences in wording, data source, or close time would matter before any comparison, and this snapshot alone does not support a conclusion about arbitrage or relative accuracy.
References
- Polymarket: Bitcoin Up or Down - October 19, 5:15PM-5:30PM ET. Provider data observed 2026-10-19T00:00:05.826Z.
AI-generated analysis based on market data. Not financial advice.
Saved Oct 19, 2026 UTCOverview
This market is a short-window contract on the price of Bitcoin, titled Bitcoin Up or Down for the window from 5:15PM to 5:30PM ET on October 19. It is listed on Polymarket and has two outcomes, Up and Down [1]. The contract resolves to Up if the time-weighted average price (TWAP) of Bitcoin over the stated window is greater than or equal to the price at the start of that window. Otherwise it resolves to Down [1]. The resolution source is Chainlink's BTC/USD TWAP data stream, which the source identifies as a 60-second stream [1]. The source states that only this Chainlink data stream counts for resolution, not other price feeds or spot markets [1]. This means the outcome depends on the specific Chainlink measurement rather than on any exchange's displayed price. The saved snapshot shows the Up outcome at 0.505 and the Down outcome at 0.495 [1]. These are observed prices from that snapshot, not executable quotes, and they should not be read as verified probabilities. The listed end time for the contract is 2026-10-19T21:30:00.000Z [1]. That date is part of the contract rules and does not show that any event has occurred. The provider status in the saved record is active [1].
Why It Matters
The contract measures the direction of Bitcoin's Chainlink TWAP over a single 15-minute window. Because the comparison is between the window's time-weighted average and the price at the window's start, the outcome is determined by the averaged price path rather than only the final price [1]. Anyone reading the contract should use the Chainlink stream named in the rules as the reference, since the source says other sources do not determine the result [1].
Snapshot context
The latest published provider snapshot for this topic was observed on 2026-10-19 at 00:00 UTC. It contains listings from Polymarket. Market descriptions and listed closing times define the contracts; they do not establish that the real-world outcome has occurred. This article does not include a separately verified news update. [1]
Frequently Asked Questions
What determines whether this contract resolves Up?
The contract resolves Up if the Chainlink BTC/USD TWAP over the stated time range is greater than or equal to the price at the beginning of that range [1].
Which data source decides the outcome?
The source says the resolution source is the Chainlink BTC/USD TWAP data stream, and that other sources or spot markets do not determine the result [1].
What does the listed end time mean?
The saved record lists an end time of 2026-10-19T21:30:00.000Z [1]. This is a date in the contract rules, not a report that the market has closed or resolved.
AI-written background. References identify the evidence used; Wikipedia links under Learn More are additional reading. Prices and provider rules are dated snapshots. This is not financial advice.
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Prices are catalog snapshots and may have changed. Check each market's rules and observation time.
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Price gaps of 2 pp+
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Reviewed equivalent pairs
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No currently reviewed equivalent pairs with both binary Yes prices are available.
Price differences do not establish arbitrage. Check each pair's review, current order prices, fees and settlement rules.