Independent prediction market guide
MarketAtlas helps you see how platforms like Kalshi and Polymarket differ, what market prices actually mean, and how to trade on real-world events with clear eyes.
Featured platforms
Start with the platforms most people ask about. Facts are checked against official documentation; anything we could not confirm is clearly marked.
Event contract exchange
An exchange where traders buy and sell event contracts — financial derivatives that pay out based on the outcome of real-world events.
Peer-to-peer prediction market
A prediction market where users trade outcome shares priced between $0 and $1 against each other, settled in the USDC stablecoin.
Featured promotions
Each offer below has been checked against the platform’s official terms. Eligibility, requirements and expiry are shown on every card.
OG.com Prediction Markets
Signup bonus
$10
OG.com advertises a $10 reward for new accounts that complete identity verification and place a qualifying $10 trade.
Reward type: Reward issued after qualifying settlement; the reward type varies by jurisdiction and is not confirmed as withdrawable cash.
To qualify
Terms checked October 9, 2026
Terms, eligibility restrictions, and trading risks apply.
Trending markets
Active markets from Kalshi and Polymarket, ranked by each platform's own 24-hour activity.
Cached snapshot from official APIs, . Prices are indicative, not advice.
Leading outcomes by Yes price
Price basis: Midpoint of best bid and ask.
Total volume: 5.5M contracts
Open contracts: 2
Kalshi ID: KXNFLGAME-26OCT12BUFLAR
Read the full rules on Kalshi before trading. Prices are indicative and can change quickly.
Most active contracts — separate questions, so prices need not add up to 100%
+309 more open contracts on Polymarket
In the upcoming NFL football game between Bills and Rams, scheduled for October 12 at 8:15PM ET: This market will resolve to "Bills" if Bills win the game. This market will resolve to "Rams" if Rams win the game. Overtime is included if played. If the game ends in a tie, this market will resolve 50-50. If the game is postponed, this market will remain open…
Price basis: Price shown by the platform.
Total volume: $2M
Liquidity: $14.3M
Open contracts: 312
Polymarket ID: 947407
Read the full rules on Polymarket before trading. Prices are indicative and can change quickly.
Leading outcomes by Yes price
Price basis: Midpoint of best bid and ask.
Total volume: 2M contracts
Open contracts: 2
Kalshi ID: KXMLBGAME-26OCT122000LADMIL
Read the full rules on Kalshi before trading. Prices are indicative and can change quickly.
Leading outcomes by Yes price
+2 more open contracts on Polymarket
The FED interest rates are defined in this market by the upper bound of the target federal funds range. The decisions on the target federal funds range are made by the Federal Open Market Committee (FOMC) meetings. This market will resolve to the amount of basis points the upper bound of the target federal funds rate is changed by versus the level it was…
Price basis: Price shown by the platform.
Total volume: $33.1M
Liquidity: $3.1M
Open contracts: 5
Polymarket ID: 606422
Read the full rules on Polymarket before trading. Prices are indicative and can change quickly.
Most active contracts — separate questions, so prices need not add up to 100%
+77 more open contracts on Kalshi
Price basis: Midpoint of best bid and ask; Last traded price.
Total volume: 1.4M contracts
Open contracts: 80
Kalshi ID: KXBTCD-26OCT1217
Read the full rules on Kalshi before trading. Prices are indicative and can change quickly.
Leading outcomes by Yes price
+2 more open contracts on Polymarket
This market will resolve according to the party that wins control of the United States Senate and the party that wins control of the United States House of Representatives in the 2026 United States midterm election. A party wins control of the United States Senate if it wins a majority of the chamber’s voting seats. If no party wins a majority of voting…
Price basis: Price shown by the platform.
Total volume: $22.4M
Liquidity: $6.8M
Open contracts: 5
Polymarket ID: 32228
Read the full rules on Polymarket before trading. Prices are indicative and can change quickly.
Compare
Our comparison tool will line up fees, funding, market selection and availability. Here’s a preview of the format — values marked unverified are still being checked.
| Feature | Kalshi | Polymarket |
|---|---|---|
| Market format | Event contracts | Outcome shares |
| Platform type | Event contract exchange | Peer-to-peer prediction market |
| Fee model | Transaction fee charged on the expected earnings of a contract; exact rates are set out in Kalshi’s Fee Schedule. | Takers pay a category-based fee; makers pay nothing. Geopolitics markets and USDC deposits/withdrawals carry no Polymarket fee. |
| Deposits | Not yet verifiedUnverified | USDC. No Polymarket deposit fee; third-party on-ramps may charge. |
| Availability | Accessible internationally, with some jurisdictions restricted under Section VI of the Kalshi Member Agreement. | Restricted in a published list of jurisdictions. The United States, United Kingdom, France, Germany, Australia and four Canadian provinces are close-only on the international platform. |
Latest news
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Learn
Short, practical guides that build from the basics to confident comparison. Full guides are being written now.
How trading on real-world events works, from contracts to settlement.
Turn a market price into an implied probability and understand the spread.
Fees, liquidity, market selection and funding methods, side by side.
Position sizing, limits and recognising when to step back.
Trust & methodology
Prediction markets move fast and terms change often. Our editorial standards are designed to keep what you read accurate, current and free from undisclosed influence.
Read our methodologyFees, rules and availability are checked against each platform’s own documentation before we publish.
Demonstration data, sample content and unverified facts are always marked as such.
If we ever earn from a link, we say so on the page. Commercial ties never decide a ranking.
Reviews and offers carry a “last verified” date so you know how current they are.