Arbitrage

Same event priced differently across platforms. Buy YES on the cheaper side, NO on the expensive side. Net profit = spread minus fees.

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Velocity

Markets moving faster than 0.3pp/hour. Fast moves signal new information entering. The market hasn't fully repriced yet.

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Closing urgency

Markets resolving within 7 days where the outcome is still genuinely uncertain (15–85%). Time compression creates opportunity.

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Platform conviction

One platform is pricing 5pp+ above the consensus. The higher-volume platform tends to be right. Follow the smart money.

Arbitrage Signals

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Spread minus estimated 4% round-trip fees (2% each side). Positive net = locked profit if you can position on both sides simultaneously. Not investment advice. Verify fees and liquidity before trading.

No spreads above 3pp right now. Spreads open after breaking news, then close quickly. Check back after major data releases or political events.
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Fast Movers — Last 2 Hours

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Price velocity above 0.3pp/hour. Fast moves almost always mean news — the faster the move, the less repriced the market likely is. Check the underlying news before acting.

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Closing Urgency

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Markets resolving within 7 days where probability is between 15–85% (genuine uncertainty remains). As resolution nears, the remaining uncertainty compresses — the last traders to act take the most risk, and get the best price if they're right.

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Platform Conviction

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One platform is pricing 5pp+ above the volume-weighted consensus. Typically this means one market has sharper, more informed traders. On political and economic markets, Kalshi (CFTC-regulated) and Polymarket (highest volume) tend to lead. Manifold (play money) typically lags.

Kelly Criterion Calculator

Given a market's current price and your own estimated probability, the Kelly Criterion tells you the optimal fraction of your bankroll to bet to maximize long-run growth.

Expected value per $1:
Full Kelly bet size:
Quarter Kelly (recommended):