Polymarket US has launched five-minute up-or-down markets for four of crypto's biggest names: Bitcoin (BTC), Ether (ETH), Solana (SOL) and XRP. Announced on October 27, 2026, the rollout gives users of the CFTC-regulated app a much faster way to take a view on price direction, extending a year-long buildout of short-duration prediction markets on the platform.

How the Five-Minute Markets Work

The setup is straightforward. Each market asks one yes-or-no question: will the token's price end the five-minute window higher or lower than where it started? Users buy shares on the outcome they expect. If the call is right, the shares pay out; if it is wrong, they expire worthless. The structure amounts to a binary bet with a very short fuse. Up-or-down contracts are the prediction-market treatment of a familiar question, applying the same yes-or-no format venues have long used for elections and sports to something far more granular: a token's direction over a single five-minute stretch.

The markets cover four assets: BTC, ETH, SOL and XRP.

Resolution is automated and relies on data feeds from Chainlink, the oracle network that pipes outside price data into blockchain applications. Specifically, Polymarket uses Chainlink's 60-second time-weighted average price, or TWAP, to decide which side wins. Under a TWAP, settlement reflects an averaged price over a set interval rather than a single instantaneous reading. That rule has governed settlement since August 14, 2026, and Polymarket frames the method as a way to resolve markets efficiently and transparently, without leaning on exchange spot prices that can sometimes mislead. Automation at this scale is the point: an oracle-settled rule is what allows a market to open, close and pay out every few minutes without a human referee in the loop.

A Format That Has Been Building All Year

Short-horizon price markets have become an increasingly prominent part of Polymarket's US offering this year. The five-minute product is not appearing out of nowhere: Polymarket first introduced the format for Bitcoin in February 2026 and has refined the settlement mechanics since then.

The latest expansion followed a steady cadence. On October 15, 2026, Polymarket US added 15-minute, hourly and daily up-or-down markets for ETH, SOL and XRP. Twelve days later, the five-minute window arrived for all four tokens. The sequence — one asset first, then more durations, then more tokens — is the clearest available picture of how the platform tends to roll these products out.

Polymarket US is a separate operation from Polymarket.com, the platform's international arm, and users in the United States access the product through the domestic app rather than the global site. The US app is available in most states and operates under Commodity Futures Trading Commission (CFTC) oversight through QCX LLC.

What This Means for Traders and the Platform

The Chainlink TWAP rule is arguably the most important detail for anyone weighing whether to participate. Averaging over a full minute raises the cost of manipulation. It does not make manipulation impossible, but it does make the outcome harder to hijack with one well-timed order.

For users, the practical takeaway is unglamorous. Five minutes is plenty of time for a market to do something unexpected. These contracts are what they are: fast, binary wagers on short-term direction, settled by an averaged price feed rather than a single tick. As for what comes next, any further widening — more durations, more tokens, additional settlement refinements — would arrive the same way this expansion did: through platform announcements.

Disclosure: CryptoBriefing notes this report was edited by Estefano Gomez.