Measured, not modelled
No projections, no "AI picks". We count. For every pair and stack of legs — a QB's passing-TD over and his WR1's anytime TD, two running backs from the same backfield, a receiver's yards and the game total — we count how often they hit together in real games, and compare it to how often they would if they were independent.
QB pass-TD over + WR1 anytime TD
Hit together 51% more often than the book's independent price assumes. The book knows the legs are related; it does not know by how much.
RB1 carries over + RB2 anytime TD
The "whole backfield" slip casual bettors build every Sunday. One back's workload comes out of the other's: they hit together 20–25% less often than independence says. FADE.
Five-leg stacks, out of sample
Median lift of the measured 5-leg stacks in the 2024 holdout season — tables are fit on 2016–2023 and checked on 2024. Stacks that didn't hold up aren't in the product.
Works where you already bet
You don't rebuild your parlay in another app. You bring it from the book, or let the Chrome extension read it off the page.
Paste, link or screenshot
Copy the slip from DraftKings or FanDuel, drop a share link, or screenshot a "popular SGPs" page with ten parlays on it — every one gets priced and ranked.
Chrome extension
A LegLens bar appears on the bet slip and every pre-built parlay card on DraftKings and FanDuel: fair price, the book's quote, EV, stamp.
The daily card
Every morning, every correlated stack on the slate priced across books with the real quote next to our fair line — plus the stacks to fade.
Track record
Every bet we log is settled automatically from box scores. Here is how the stamps have done, live, since we started logging. We publish the misses too.
| Stamp | Settled | Hit rate | We said | P&L |
|---|---|---|---|---|
| Loading… | ||||
Cumulative P&L (units)
A track record under a few hundred settled bets is still mostly noise. We say so, and we show it anyway: the backtest is the claim, the record is the receipt.
Plans
Annual is one month free. Cancel any time. Apps on iOS and Android included on every plan.
Pro
- Full daily card, every league, per-book quotes
- Unlimited slip checks: paste, link, screenshot
- Chrome extension on DraftKings & FanDuel
- Bet record with automatic settling
- 3–6 leg stacks priced from measured history
Sharp
- Everything in Pro
- Same-player stacks (yards + own TD)
- Alt-line tables (60th / 70th percentile lines)
- Game-context and usage-share correlation
- Quarter-Kelly stake sizing, book-shade model
Straight answers
Is this a picks service?
No. We don't predict who wins. We price what you're already looking at and tell you whether the book's number is longer or shorter than history says it should be.
Does every BET win?
No. A BET is a bet with positive expected value — paid more than it's worth. Most parlays still lose. The edge shows up over many small bets, not one.
Why do long parlays rate PASS so often?
Books shade 5-leg stacks hard — a slip worth +6600 gets quoted +2700. The edge is in 2–3 leg stacks the book prices as independent. LegLens tells you which.