Arena

About Arena

Arena is a paper-trading app for prediction markets. You trade real, live market prices using virtual dollars. There is no real money involved, ever. Think of it as a flight simulator for forecasting: real conditions, real feedback, zero financial risk.

Real prices, fake stakes

Every price you see in Arena comes from real prediction markets, including Kalshi and other public venues. What you trade with is “aura”: virtual dollars, not money. Balances reset on a monthly season. These dollars are not real currency, have no cash value, and can never be deposited, withdrawn, or redeemed for cash or prizes. Nothing you do in Arena moves real funds.

How a paper trade works

  • You choose a market, a side (Yes/No), and a number of contracts. That’s the only thing the app sends. You never set your own price.
  • The trade fills at the live market ask/bid at that moment, priced on our server so the fill is honest and can’t be gamed. One contract settles for $1.00 if your side is correct, $0 if not.
  • When the underlying real-world event resolves, your position settles automatically from that real outcome (the same result the underlying market pays on).

How we score you

Net worth is your spendable balance plus the current value of your open positions. Leaderboards rank net worth for the season. Arena also measures genuine forecasting skill (calibration, Brier-based accuracy, and closing-line value), so being right on purpose is rewarded, not just getting lucky.

About the data and AI picks

Prices are indicative and may be delayed relative to the source exchange. Market data remains the property of its respective owners. Arena’s AI picks are model-generated forecasts published for entertainment and education. They are not financial or investment advice.

Independence and non-affiliation

Arena is an independent product of ZBGC LLC. It is not affiliated with, endorsed by, or partnered with Kalshi, Polymarket, or any exchange. We reference those markets only to attribute the data we display.

The short version

Arena is an entertainment and self-improvement tool for people who love prediction markets. It is not a licensed gambling operator, bookmaker, financial broker, or investment advisor, and it is intended for users 17 and older.

Read the Terms of Use and Privacy Policy, or get in touch.