LINEGREPPER.COM
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If you're gonna do it, do it right.

Providing players with professional data science tools for line shopping and betting.
• Aggregating sports odds and formatting them in an efficient view.
• Building a consensus price from institutions and highlighting outliers.

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The EV board

For big fans of big outliers.

Biggest outliers against a consensus are highlighted for you.
Sizing is suggested from your bankroll and the consensus odds of winning.

Pre-game +EV · highest edge first illustrative feed
#EVEventBetBookPrice TrueStakeAgeTools
[1]+7.00% Seattle Mariners @ Houston AstrosMariners −1.5 +15042.8% $23.3318s
[2]+5.19% Las Vegas Aces @ Minnesota LynxAces −4.5 −11055.1% $28.5523s
[3]+3.18% Chicago Cubs @ St. Louis CardinalsRuns U7.5 +12046.9% $13.2531s
[4]+1.72% Las Vegas Aces @ Minnesota LynxLynx +6.5 −10552.1% $9.0344s

The odds view

Multiple prices for a market, in your face.

Sportsbook and prediction-market prices, presented in one clear view.
Searchable games and simple navigation break down main lines and props.
Each market shows the combined hold, or house edge.
Everything is designed to make line shopping easier.

Line inspector · Mariners @ Astros · Run line illustrative feed
BookMariners −1.5Astros +1.5Hold
█████+142−168+4.0%
████+138−162+3.8%
███████+150−175+3.6%
███+145−170+3.8%
██████+134−158+4.0%
Best-price synthetic market hold +1.2%
Best available
Mariners −1.5 +150 ███████ Astros +1.5 −158 ██████
Best prices are highlighted as they move. Hold combines the best opposing prices, even when they come from different books.
Odds history · Mariners −1.5 illustrative · 4 anonymous books
Representative cross-book line movement Four anonymous sportsbook prices shown as verified implied-probability steps over two hours. A dashed tail marks a last-known price.

Four buttons. Four actions. O opens the odds. G graphs the line. P builds a parlay. M builds a middle.

Your workspace

Set the board up your way.

Open only the tools you need. Move, resize, minimise or close each panel.
Your layout is saved to your account and restored when you sign back in.

Move it. Resize it. Save it. The workspace adapts to the way you shop.

Two keys, two builders

Press P for a parlay. Press M for a middle.

Each builder uses your bankroll and Kelly setting.
See the price, risk and suggested size before placing a bet.

Pre-game +EV building parlay
BetBookPriceTrue%*
Mariners ML +150 42.8%
Aces −4.5 −110 55.1%
Under 7.5 runs −105 51.4%
Parlay builder · $1,000 bankroll · 0.50 Kelly
Press +P on any two bets.
Offered+377
True price+324
True chance23.6%
Edge+12.5%
Stake$16.63
Returns$79.37

One ticket means one book. The builder compares the offered parlay with the consensus price, then applies your Kelly setting.

P builds a parlay. Add the legs, compare the offered and consensus prices, and size the ticket from your bankroll.

Line inspector pairing a middle
SideBookPrice
Home −7.5 █████ −165
Home −8.5 ███ −135
Away +9.5 ████ −105
Middle builder · risking $5
Press M on two opposing sides.
Stake on Home −7.5$23.07
Stake on Away +9.5$18.98
Total on the table$42.05
Cost of the window13.5%
Home by 8 or 9 — both win+$32.06
Home by 10+−$5.00
Home by 7 or less−$5.00

Equal risk does not mean equal stakes. Choose the intended loss or a cash cap. The calculator balances both sides for you.

Different books can create the window. This example risks $5.00 to win $32.06 when the result lands in the middle.

M builds a middle. Pair opposing sides to see the winning window, its cost and the balanced stake for each book.

What it does

The tools, without the clutter.

Pre-game +EV

Outlying prices ranked by edge, with confidence adjusted for the evidence behind them.

Arbitrage

Opposing prices that lock a return. Both legs must be available and executable.

Middles

Spread and total pairs with room for both bets to win. See the window, cost and payout.

Line inspector

Main lines, alternates and props across every available book, side by side.

Odds history graphs

Price movement by book over time, with last-known prices clearly marked.

Futures

Outright markets across books, with prediction-market depth checked for fillable prices.

Calculators

Kelly, arbitrage and middle sizing using your private bankroll settings.

Private beta

Built carefully. Opened gradually.

LineGrepper is onboarding a small group of beta users. Have an invitation and active licence? Sign in. Otherwise, join the release list.

What this is not

LineGrepper is an analysis tool. It is not betting advice or a promise of profit. Prices move. Data can be incomplete. An estimated edge does not guarantee availability or a win. You are responsible for your wagers and local laws. Gamble responsibly. In the US, call or text 1-800-GAMBLER.