Definition
What is a sharp line?
Last updated
Definition
A sharp line is a market price that reflects efficient information — typically posted by a low-vig book that accepts large sharp money (Pinnacle, Cloudbet, Sportmarket). Sharp lines tend to be the reference point against which other books' lines are evaluated.
Sharp lines come from books that don't limit winners. When a sharp puts $50K on the over and the line moves, that move is informational; when a recreational book limits a sharp at $500, the recreational line doesn't move from sharp money. Sharp operators measure CLV against sharp closes, not recreational closes, because that's where the actual price-discovery happens.
Why the close matters
The closing line is the market’s final aggregate guess at true probability. It incorporates every sharp’s placement, every model’s output, every late information leak. A sharp closing line is the best public estimate of true probability you’ll find.
Where sharp lines live
Pinnacle has been the canonical sharp book for two decades — they advertise “we don’t limit winners” and the line behaves accordingly. Cloudbet is competitive on many markets, especially crypto-deposit accepting jurisdictions. Sportmarket and a handful of exchanges also count as sharp price-discovery surfaces.