SwellNow on testnetTestnet

1. Open a live match, pick up or down

Every event shows one team’s chance to win: Real Madrid, 58%. Will it be higher or lower in three minutes? Choose UP or DOWN and enter an amount, say $25.

1. Open a live match, pick up or down

Every event shows one team’s chance to win: Real Madrid, 58%. Will it be higher or lower in three minutes? Choose UP or DOWN and enter an amount, say $25.

1. Open a live match, pick up or down

Every event shows one team’s chance to win: Real Madrid, 58%. Will it be higher or lower in three minutes? Choose UP or DOWN and enter an amount, say $25.

Favorite up or down
in three minutes?

The favorite's probability moves throughout the event. Guess the direction and split the pool if you're right.

1. Open a live match, pick up or down

Every event shows one team’s chance to win: Real Madrid, 58%. Will it be higher or lower in three minutes? Choose UP or DOWN and enter an amount, say $25.

Probabilities from

LIVE NOW

Guess fastThen just watch

A new window every three minutes, on whatever is live right now. Guess before it closes.

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How it works

Higher or lower

That’s the whole question. Pick a side, wait three minutes, and the right side splits the pool.

1/3

Already in play

Every number here is live and climbs with every three-minute window. The next one could have your side in it.

The favorite is moving right now

10 events are live, and the probability is moving in every one. Three minutes to guess where it goes.

1. Open a live match, pick up or down

Every event shows one team’s chance to win: Real Madrid, 58%. Will it be higher or lower in three minutes? Choose UP or DOWN and enter an amount, say $25.

Questions worth asking

What am I actually picking?

Up or down on the probability over the next three minutes, not who wins the match. The match is what moves the number; the number is what you call.

Where does the number come from?

From Polymarket. The live price of a market is its probability, and we read it. We don't set it. Open the same market and check.

How is a window decided?

Three minutes to pick, then three with the pool locked. The base is the average price over the last 30 seconds before the cutoff; the final is the average over the last 30 seconds before resolution. Higher means up. Both are averages over per-second samples, not single ticks. One print can't decide a window.

How much do I get if I'm right?

Your share of the pool, not a fixed price. The fewer people on your side, the bigger the slice.

What if the line doesn't move?

Nobody was right, so nobody takes anything: the whole pool goes back and we take no cut. It's a decision, not a failure. The same goes for windows where the price data wasn't trustworthy.

Are you on the other side of my pick?

No. The pool is made of other people's money, the odds are made by how they split, and we hold no position. We can't win, because we're not playing.

Can you take my money?

The contract has no operator withdrawal. Withdrawals are separated from picks and payouts at the function level, so our server signs the first two and physically cannot sign the third. That's checkable on-chain, not a promise.

What do I need to start?

An email or a Google account. A wallet is created for you, no seed phrase. You hold USDC on Base; picking and getting paid cost no gas.

Still have questions?On the blog we break down how the pool works, where the odds come from and how to read a moving line.Read the blog