Round machine

Windows are five minutes long and aligned to the clock. LIVE is the window running right now; NEXT is the one about to start. When LIVE ends it settles, NEXT becomes LIVE, and a fresh NEXT opens the same second.

You can buy into either one

Tickets on NEXT are even money — nothing has happened yet. Tickets on the window already running are priced live, the way a Polymarket share is: as the mark pulls away from the Price to Beat and the clock runs down, one side gets expensive and the other gets cheap.

Buy UP at 90¢ and you are paying for something that is 90% likely — so it pays little. Buy the 10¢ side and it pays a lot, because it usually loses. Without this, a wallet buying three seconds before the close with the answer already on screen would take the same odds as someone who bought blind at the open, and that is just other people's money.

Selling out early

Any open position can be sold back to the desk while its window is still running. The price is fair value — your chance of winning times what winning pays — minus a spread that widens as the close approaches. So bailing out with five seconds left is deliberately worse than holding: otherwise the last moment would be a risk-free exit paid for by everyone still in.

Minimum ticket — $2

Every ticket must be worth at least $2 USD in BINS. The BINS/USD rate is read when a window opens and pinned for that window, so the minimum cannot move underneath you. If no BINS price is available, ticket sales pause rather than guess.

Quorum — five wallets

A window needs 5 unique wallets or it voids: every ticket refunds and the protocol takes nothing. A one-sided book voids too. Wallets that sold out early still count — they did turn up.

Payout — losers pay winners

Winners keep 100% of their stake and split what the losing side left behind, in proportion to the weight of their ticket — stake × (1−p)/p, where p was the price they paid. Everyone buying at even money makes weight equal to stake, and it collapses to plain pro-rata.

The rake comes out of the surplus only — never winner principal, and nothing at all on a void. Settlement divides what the round actually still holds after early exits, so it can never pay out more than it has.

Price to Beat

The SOL/USD mark when the window opens, and it resolves Up if the close is at or above it. Every mark is the median of at least three independent venues (Binance, Coinbase, Kraken, OKX). If fewer than two answer, or they disagree beyond the limit, no mark is published and the window voids rather than settling on a suspect price.

Proof, not promises

Every settled window publishes an immutable receipt — all tickets, both marks, the pots, the rake, every payout, every early exit — carrying the hash of the previous round's receipt. No round can be quietly rewritten without breaking every receipt that follows. Links are on each settled round below.

Custody — read this part

BINS you deposit is held by the operator in a treasury wallet, and the round ledger is a database, not an on-chain program. You are trusting this operator with custody; the receipt chain makes the ledger auditable, but that is not the same guarantee as a vault program you can verify on chain. Withdraw what you are not actively trading.