Paper trading prediction markets
Updated
Paper trading a prediction market means taking a position on a real-world question — an election, a rate decision, a title race — at the price real traders are paying, with money that is not real. You get the market’s discipline and none of its downside.
Papermarkets is a prediction market simulator built on live Polymarket and Kalshi prices. Every account starts the monthly season with $10,000 in play money across thousands of live markets. There is nothing to deposit, nothing to withdraw, and no way to lose anything but position on the leaderboard.
Can you practice on Polymarket or Kalshi without real money?
Not with live prices. Polymarket has no practice mode, and every position there is funded. Kalshi runs a separate demo site with mock funds you add yourself, but its prices, in Kalshi’s own words, may not reflect the real markets. What you can do is trade the same markets at the same prices with play money. Papermarkets mirrors Polymarket’s live markets, shows Kalshi’s price beside them wherever Kalshi lists the same event, and settles every position on the real market’s outcome. Each account starts the monthly season with $10,000 of play money, ranked on a public leaderboard, and you can run private games against friends from any balance you choose. Two things do not carry over: a paper order fills at the last quoted price rather than walking the order book, and losing play money does not test your nerve the way losing real money does. Papermarkets is free and not affiliated with either venue.
Why paper trade a prediction market?
The odds are real, the money is not
Prices come straight from Polymarket and Kalshi, so a contract at 32¢ means real traders are pricing that outcome near 32%. What changes is your balance: it is play money, funded on signup, with nothing to deposit and nothing to withdraw.
Being wrong is the point
Most people find out their forecasting is worse than they thought, and the cheapest place to find that out is a paper account. You keep the full record — entry price, size, timing — without paying tuition to learn that you sized a 6% market like a coin flip.
Sizing and timing are separate skills
Reading a market correctly and trading it well are different problems. Paper trading isolates the second one: you already know your thesis, so what you are testing is whether you enter too early, hold too long, or stake too much on a position you only half believe.
How it works
1. Pick a question
Every market is a real-world question with a resolution date attached. Browse by category or go straight to whatever you already have an opinion about.
2. Read the price as odds
A market at 32¢ is the crowd saying it happens about 32% of the time. Your edge, if you have one, is disagreeing with that number for a reason.
3. Take the other side
Buy the side you think is mispriced. The position moves with the live market until the event resolves, exactly as a funded one would.
4. Check your record
Your portfolio tracks every fill and the leaderboard scores you against everyone else trading the same markets. That record is the whole product.
What you can paper trade
Every category below is a live feed of markets, priced continuously.
Paper trading questions
- What is paper trading?
- Paper trading means placing trades with simulated money against real market prices. Your positions, entry prices and profit and loss are tracked exactly as they would be with real capital — nothing is at stake except your record.
- What is a prediction market?
- A prediction market prices the probability of a real-world event. Each contract pays out if the event happens, so its price — between 0 and 100 cents — reads directly as the market's estimate of the odds. Traders who disagree buy the side they think is cheap, which is what keeps the price honest.
- Is Papermarkets free?
- Yes. Papermarkets is paper trading only, so there is nothing to fund. Every account starts the monthly season with $10,000 in play money, and the markets are the same live ones either way.
- Is Papermarkets part of Polymarket or Kalshi?
- No. Papermarkets is independent and not affiliated with either. It reads their public prices; your trades here never reach them.
- Which markets can I paper trade?
- Politics and elections, the Fed and rate decisions, NBA, NFL, MLB and college football, soccer, tennis, UFC and esports, crypto and Bitcoin, tech, AI and culture — thousands of live questions, all priced continuously.
- Can I paper trade against friends?
- Yes. Create a private game, choose which categories it carries and what everyone starts with, then share the link. Each player gets their own balance and a leaderboard scored against the same live markets.
- Does paper trading actually make you better?
- It makes you measurable, which is the prerequisite. A paper record shows whether your calls beat the market's price rather than whether they felt right — and it does so without the position sizing errors of a first real account being expensive.