# 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: *** ## 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 | Price of 1 Contract | Fee for 1 Contract | Price of 100 Contract | Fee for 100 Contract | | ------------------- | ------------------ | --------------------- | -------------------- | | $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 {% hint style="warning" %} Prediction market features may not be available in certain jurisdictions due to regulatory requirements. {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://basedapp.gitbook.io/docs/based/prediction.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.