Linevigil: sportsbook vs Kalshi odds tracker

Linevigil is for people who follow both sportsbooks and prediction markets and want a disciplined record of the gap between them: the retail trader who has noticed that DraftKings and Kalshi sometimes move in opposite directions on the same game and wants to know whether that gap is a real edge or a story they tell themselves. It is not a sportsbook and not an exchange; it places no bets and touches no money.

How it works: tonight's NBA, NFL or MLB games go on a watchlist. For each one you log the sportsbook moneyline, the Kalshi implied probability and your own perceived true probability, and Linevigil computes the implied edge per side. As lines move you tap the game and log each movement (opened at −110, −125 by tipoff) and it charts the path. A library of fourteen hand-written line-movement patterns (public reverse, sharp move, steam play, air ball) explains what each signal usually means. Because it depends on you entering odds, it needs no book integration and no account; the journal is the product.