PredictIt VS outcometick

• Real-money political forecasting
  PredictIt allows users to trade on real-world political and economic events using actual money, providing tangible financial incentives that can lead to more accurate crowd-sourced predictions than traditional polling.
• Academic legitimacy
  Operated in partnership with Victoria University of Wellington, PredictIt has a no-action letter from the CFTC for academic research purposes, giving it a degree of regulatory recognition and legitimacy compared to unregulated prediction markets.
• Diverse market offerings
  The platform covers a wide range of topics beyond just elections, including legislative outcomes, court decisions, economic indicators, and other newsworthy events, giving traders many opportunities to speculate.
• Transparent pricing reflecting probabilities
  Contract prices on PredictIt (ranging from $0.01 to $1.00) directly reflect the market's perceived probability of an event occurring, making it easy to interpret sentiment and track how odds shift over time.
• Low barrier to entry
  Users can start trading with small amounts of money, as low as a few dollars per contract, making it accessible to casual traders and enthusiasts who want to engage with political forecasting without significant capital investment.

Possible disadvantages

• Trading and withdrawal fees
  PredictIt charges a 10% fee on profits from winning trades and a 5% fee on withdrawals, which can significantly cut into overall returns compared to other trading or investment platforms.
• Position limits restrict scalability
  The platform caps the number of shares a single user can hold in any given market (historically around 850 shares per contract), preventing large-scale trading or significant capital deployment even when a trader has high confidence in an outcome.
• Regulatory uncertainty and legal challenges
  PredictIt has faced ongoing regulatory scrutiny, including a CFTC attempt to revoke its no-action letter, creating uncertainty about the platform's long-term legal status and potential for sudden shutdowns or operational disruptions.
• Liquidity issues in niche markets
  While major political markets like presidential elections have good liquidity, many smaller or niche contracts suffer from low trading volume, resulting in wide bid-ask spreads and difficulty executing trades at fair prices.
• Limited to U.S. users primarily
  The platform's terms of service and functionality are primarily designed for U.S.-based users, and non-U.S. residents may face restrictions or complications when trying to deposit, withdraw, or verify their accounts.

• Polymarket coverage
  BNB, BTC, DOGE, ETH, HYPE, SOL, XRP — 5m and 15m Up/Down markets
• Predict.fun coverage
  BTC, ETH, BNB — 5m, 15m, hourly and daily markets
• Settlement feeds
  Chainlink streams the markets settle on, incl. 30s/60s TWAP streams on Polymarket
• Order books
  Full-depth snapshots, updates and top of book on Polymarket; snapshots on Predict.fun
• Strike and outcome
  Per-market strike and settled outcome, so results can be recomputed
• Trade prints
  Polymarket trades plus OHLC candles from 1s to 1mo
• Separate timestamps
  Event, upstream and receive times kept apart
• Self-serve API
  Gzipped CSV/JSONL files, each with its size and SHA-256
• History
  Since 2026-06-08 (Polymarket) and 2026-06-13 (Predict.fun), published T+2
• Hosted backtests
  Python or Node.js strategies against the same archive, fills against real book depth
• SDK and CLI
  Open-source `outcometick` SDK and `ot` CLI on npm and PyPI (MIT)
• Free sample
  One real day per venue on GitHub, Kaggle and Hugging Face