Skip to main content
Omnibook runs a continuous series of 60-second rounds on the BTC price. Each round fixes a strike, trades for its window, then freezes and settles against the oracle price.

​
Lifecycle

Anything still resting when a round freezes is cancelled for you.

​
round_number vs market_id

market_id is recycled. round_number is not.The venue draws market_id from a small pool and reuses values as rounds complete, so the same market_id will refer to a different round later. It is the parameter that order and orderbook endpoints take, but it is not an identity.Key your own state — open orders, positions, PnL history — on round_number, which is monotonic and never reused. Re-read the round before acting on a cached market_id, or you will eventually place an order on the wrong round.

​
Prices

strike and settle_price are integers in units of 1e-8 USD. A strike of 6399240000000 is $63,992.40. Contract prices are different: integer ticks from 1 to 99, in cents, representing implied probability. See Placing orders.

​
Settlement

At freeze, the round settles against the oracle’s BTC price. winner becomes "yes" if the settle price is above the strike, "no" otherwise. Winning contracts pay 100¢, losing ones 0¢. fresh_source_count_at_freeze reports how many independent price sources were live at that moment — useful if you want to weight your confidence in a settlement.

​
Reading rounds

GET /v1/rounds?limit=1 returning status: "trading" is the normal way to find what to trade right now.

​
Categories

category groups rounds into series. Today the BTC 60-second series is category 1. Filter on it if you only care about one series.