Prediction
Based integrates PolyMarket prediction markets directly alongside perpetuals and spot trading on Hyperliquid — all within a single app. Move seamlessly between trading and predictions without worrying about bridging, deposits, or withdrawals.
Explore hundreds of markets across categories including Crypto, Sports, Finance, Elections, Politics, Geopolitics, Tech, Culture, and more.
You can access the prediction interface at: https://app.based.one/predict
Web Features
Market Views
Browse markets in list view for a detailed table with probability, volume, 24h price change, liquidity, and closing time — or switch to card view for a visual overview of top outcomes with quick Yes/No trading.
A calendar view is also available, showing markets organized by their event dates for easy planning.
Filters & Sorting
Use the advanced filter panel to narrow down markets by status, volume, liquidity, date ranges, and sort order — making it easy to find the most opportune markets.
Top Traders
View the leaderboard of top prediction market traders ranked by profit and volume. Analyze the biggest wins of all time and study top traders' strategies to inform your own positions.
Trader Analysis
Dive into any trader's portfolio to see their portfolio value, biggest win, total trades, profit/loss chart, and active or closed positions.
Mobile App
Prediction markets are fully available on the Based mobile app. Browse trending markets, manage your portfolio, and trade Yes/No contracts on the go.
Trading Fees
Trading fees are calculated as a variable percentage of the expected payout for each contract. This expected payout is determined by taking the maximum possible earnings and multiplying it by the implied probability of achieving those earnings (which is simply the contract price divided by $1). Fees are applied for buys / opening of positions. Sells/closing of positions do not incur fees as of 12 Dec 2025.
The fee you pay for a trade, in dollars, follows this formula:
fee = round up (0.07 × C × P × (1 – P))
Where:
P is the contract price in dollars (e.g., 50 cents = 0.5)
C is the number of contracts being traded
round up means the amount is rounded up to the nearest cent
$0.01
$0.01
$1.00
$0.07
$0.05
$0.01
$5.00
$0.34
$0.10
$0.01
$10.00
$0.63
$0.15
$0.01
$15.00
$0.90
$0.20
$0.02
$20.00
$1.12
$0.25
$0.02
$25.00
$1.32
$0.30
$0.02
$30.00
$1.47
$0.35
$0.02
$35.00
$1.60
$0.40
$0.02
$40.00
$1.68
$0.45
$0.02
$45.00
$1.74
$0.50
$0.02
$50.00
$1.75
$0.55
$0.02
$55.00
$1.74
$0.60
$0.02
$60.00
$1.68
$0.65
$0.02
$65.00
$1.60
$0.70
$0.02
$70.00
$1.47
$0.75
$0.02
$75.00
$1.32
$0.80
$0.02
$80.00
$1.12
$0.85
$0.01
$85.00
$0.90
$0.90
$0.01
$90.00
$0.63
$0.95
$0.01
$95.00
$0.34
$0.99
$0.01
$99.00
$0.07
Access Restrictions
Prediction market features may not be available in certain jurisdictions due to regulatory requirements.
Last updated