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Search the guides below. If something is still unclear, the contact page lists how to reach us.
Getting started
What this is and how the first five minutes work.
What is a prediction market?
A market where each share pays 1 USDC if an outcome happens and nothing if it doesn't. The price is the market's estimate of the probability.
Read more →How the platform works end to end
Create or find a market, buy YES or NO with USDC, the outcome resolves on chain, then claim what your winning shares are worth.
Read more →Is this real money?
The platform runs on Arc Testnet with testnet USDC, which has no monetary value. Everything is a real on-chain transaction, but not a real financial position.
Read more →
Wallets, network and USDC
Connecting, switching network and funding.
Connecting a wallet
Use any EVM wallet. The platform is non-custodial: it never holds your keys and cannot move your funds.
Switching to Arc
If your wallet is on another network, the app prompts you to switch. Transactions cannot be sent until the correct network is selected.
Getting testnet USDC
Request testnet USDC from the Circle faucet. On Arc, USDC also pays the transaction cost, so keep a small buffer.
Why do I need to approve USDC?
ERC-20 tokens require an allowance before a contract can move them. Approval is a separate one-off transaction per spending contract.
Trading
Buying, cashing out, fees and slippage.
Buying YES or NO
Enter an amount, review the shares, fee and price impact, then sign. Orders execute immediately against the market maker.
Read more →Cashing out before resolution
Sell your shares back to the market at the current price at any time while the market is open.
Read more →Fees
1.50% total on applicable trades: 1.00% protocol, 0.25% creator, 0.25% liquidity.
Read more →Slippage and price impact
Large trades move the price. Set a slippage tolerance so a trade reverts instead of filling at a worse price than you accept.
Read more →Are there limit orders?
No. This is an automated market maker, so all trades are market orders. No order book or limit order is simulated.
Read more →
Creating markets
Writing a resolvable question and earning fees.
How to create a market
Write an unambiguous question, pick a topic, set the close time, seed initial liquidity and post the creation bond.
Read more →Rules your question must follow
Questions must be objectively resolvable from a stated source and must not fall into prohibited categories.
Read more →What creators earn
0.25% of applicable trading volume accrues to the creator wallet and is claimed from the portfolio page.
Read more →Prohibited markets
Certain question types are not allowed on this interface, including those targeting individuals' harm.
Read more →
Resolution and claims
How outcomes are decided and paid.
How resolution works
After a market closes, anyone can propose an outcome with a bond. If unchallenged through the window, it finalises on chain.
Read more →Challenging a proposal
During the challenge window, anyone can challenge a proposed outcome by posting a bond.
Read more →Invalid markets
If a question cannot be resolved fairly, it can settle as invalid and positions are handled accordingly.
Read more →Claiming winnings
Open the portfolio page and redeem winning positions. Claiming is a separate on-chain transaction and has no platform fee.
Read more →
Troubleshooting
When something fails.
My transaction failed
Common causes: insufficient USDC for the transaction cost, expired allowance, slippage tolerance exceeded, or the market closed between quote and signature.
Prices or balances look stale
Data is read straight from an Arc node with no hosted indexer. If the node is slow, values refresh on the next successful read, check system status.
Read more →A market looks misleading
Use the report action on the market page. Reports affect interface presentation only; on-chain markets cannot be deleted.
Read more →