Polymarket crypto Up or Down markets: how they work and what wins them
Up or Down markets ask one thing: will a coin finish a short window higher or lower than it started? They settle fast, trade constantly and reward speed — which makes them the easiest markets to measure a trader in, and among the hardest to copy.
What the market asks
Each Up or Down market covers one coin and one fixed window: Up wins if the price at the end of the window is at or above the price at its start, as defined by the market's rules and its resolution source — a price feed named on the market. Windows run from minutes to a day, and new windows open around the clock.
Why the samples are large
Because a market settles within its window, an active trader decides hundreds of them in a month. That makes win rates in this category statistically meaningful quickly — and also makes the lower bound of the confidence interval the right thing to read, because consecutive windows on the same coin are related, not independent.
What decides who wins
Prices in these markets react to the underlying coin in seconds. Makers quote both sides and manage inventory as the coin moves; takers bet on direction from information they act on fast. Crypto markets carry Polymarket's taker fee — the highest category rate in its documentation as of October 2026 — so a taker needs an edge larger than the fee, which is largest for trades near 50¢.
Why they are hard to copy
A window can be minutes long and its price moves with the coin, so the delay between a trader's fill and your copy matters more here than anywhere else. Copy only takers, test at your real latency, and expect a copied edge to shrink. For research rather than copying, tick-level order books and Chainlink settlement prices for these markets are available from our partner OutcomeTick.
Find the specialists
The crypto Up or Down leaderboard lists traders who did at least half of their trading in these markets over the last 30 days, ranked by realised profit, with style, markets won and lost, and the win rate's lower bound.
Questions
How do Polymarket Up or Down markets resolve?
By comparing a coin's price at the end of a fixed window with its price at the start, using the resolution source named in each market's rules. Read the market's rules before trading; windows and sources differ.
Do Polymarket crypto markets have fees?
Yes. Per Polymarket's documentation as of October 2026, crypto markets carry a taker fee, the highest of its category rates; makers are not charged.
Who are the best Polymarket Up or Down traders?
See the PMWallets crypto Up or Down leaderboard: specialists ranked by 30-day realised profit, each with markets won and lost and the lower bound of the win rate.