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+EV Scanner · 2 opportunities

Positive EV Bets — Updated Every Visit

Every Kalshi market priced cheaper than the no-vig sportsbook consensus, ranked by edge. Hidden: markets under 4% or over 96% (settled), markets backed by fewer than 2 books (noise), and edges under 1.5pp.

Opportunities
2
Leagues active
2
Avg edge
+3.3%
Biggest edge
+3.9%
San Antonio
All (2)NBA (1)MLS (1)
Edge = books_median − Kalshi. Top 2 rows. Sorted by edge DESC.
MarketKalshiBooks fairEdgevs BestBest priceLeagueStartBooks
San Antonio
2027 Pro Basketball Champion
19.5%23.4%+3.9%+2.5%Other +260NBA—3
Kansas City
Saint Louis vs Kansas City
12.5%15.3%+2.8%+1.3%BetRivers +575MLSJul 16, 11:00 PM9

How this works

SportsBookISH ingests Kalshi event-contract prices every 5 minutes from the official Kalshi API, sportsbook consensus from 14+ regulated US books every 15-30 minutes via The Odds API, and Polymarket prices every 15 minutes. Every quote is timestamped and stored.

For each market we compute the no-vig implied probability per book (stripping the bookmaker margin), take the median across books, and compare it to the Kalshi YES mid-price. If books say it should be 52% and Kalshi has it at 47%, you have +5pp expected value buying YES on Kalshi.

We hide markets at extremes (under 4%, over 96%) because their movement is settlement not signal, and markets backed by fewer than 2 books because a single quote is noise. The table refreshes on every page load.

FAQ

What is +EV betting?
Positive expected value (+EV) betting means consistently placing wagers where the offered price is better than the true probability of the outcome. Over many bets, mathematically, profitable. SportsBookISH derives 'true probability' from the no-vig sportsbook consensus and the Kalshi exchange mid-price.
How is the edge calculated?
Edge = (no-vig books median implied probability) − (Kalshi mid implied probability). A +5pp edge on a Kalshi YES contract means books fair-value the outcome at 5 percentage points higher probability than Kalshi is pricing it — so Kalshi is the cheaper buy.
How fresh is this data?
Kalshi quotes refresh every 5 minutes. Sportsbook quotes every 15-30 minutes. Polymarket every 15 minutes. The page rerenders on every visit so the table is never older than your most recent page load.
Why are settled markets filtered out?
Markets with implied probability under 4% or above 96% have effectively resolved (the favored side has won or the underdog can no longer win). We hide those because their 'edge' is misleading — it's settlement, not opportunity.