Or build one tap + to add a leg · enter the book's price first
Roles are by usage: WR1 = most targets, RB1 = most carries, P1 = most minutes. Enter the odds exactly as your book shows them.
Today's stacks
Cheat sheet
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Track record phone, desktop and extension share it
Place the bet on your book, then screenshot the confirmation — Snipping Tool and Ctrl+V anywhere on this tab, drag the image in, or use the button — or copy its text. LegLens reads the legs, the odds you got, your stake and payout, prices it, and files it. NFL/CFB player legs and totals settle themselves after the games.
How it works
Books price a same-game parlay as if the legs were independent, then shade it. We measured, from every box score (NFL since 2016, CFB since 2021, NBA since 2019, NHL, CBB and MLB since 2021–22), how often each combination of legs actually hits together. A QB's passing-TD over and his WR1's anytime TD hit together 51% more often than independence says. Three legs with the over compound to +120%; five correlated legs to +500%.
Fair price is the payout at which the slip breaks even given the measured correlation. Get the book's SGP quote for the same legs. Longer than fair: +EV. Shorter: pass.
Measured vs modelled
2 legs: the exact pair rate from history. 3–6 legs: the historical rate of that exact stack when we have it (basis "measured-Nleg"), otherwise a copula built from the measured pairs. We never credit a stack more lift than history showed for it. Unmeasured pairs count as independent.
Sharp (owner tier)
With SHARP on, four extra measured tables replace the base pair where they apply: same-player (a player's yards + his own TD), alt lines (pairs measured at the 60th/70th-percentile line the books push), game context (the pair's correlation in this game's total bucket), and usage share (a QB→receiver yards correlation scaled by the receiver's trailing target share: WR1 yards track the QB ~+9% at under 18% share and ~+30% at 30%+; TD pairs show no share effect and are left alone). Every table was fit on seasons before 2024 and checked on 2024. The basis line under a price names which ones were used.
Stamps
BET — positive correlation; +EV if the book's quote beats our fair price. PASS — no measurable edge; the shade wins. FADE — negative correlation; the legs hit together less often than the book assumes. Don't build it.
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