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Middles

Opposite bets that can both win, priced on the fitted fair ladder with pushes included, ranked by EV.

LiveFree with a free account during launch
Open MiddlesHow to use it

What it does

A middle pairs a low side and a high side on the same quantity, such as Over 44.5 at one book and Under 47.5 at another. If the final total lands inside the window (45, 46 or 47), both bets win. Middles lists every such pair across your books, on main and alternate points.

The value of a middle is not the window alone; it's the probability of landing in it against the cost of the two prices. The screen prices each result from the fair ladder fitted across every book's lines (the same ladder the +EV screen uses), so the EV % column is the long-run value of the pair, not a guarantee. Example (normal approximation, centre 46, spread 13.5): Over 44.5 −110 and Under 47.5 −110 land in the middle about 8.8% of the time, and the pair is worth about +3.9% of the total staked. Football key numbers can make the real figure higher or lower than a normal curve.

Each row shows EV %, EVENT, MARKET, BOOKS, BET SIZE and the pair's EV in dollars with its window. Expand a row for OUTCOMES: the chance and profit of each result (below the low line, exactly on it, between the lines, exactly on the high line, above it), plus how often the middle hits and pushes.

Who it's for

  • Spread and total bettors who watch lines move between books.
  • Bettors holding an early position who want to middle it after the line moves.
  • Anyone who wants the honest probability of a middle instead of a hopeful one.

Coverage

The collector is built for four groups of books. Which of them quote a given game depends on what each book posts, so a column can be empty.

GroupBooksHow we use them
Regulated US sportsbooksDraftKings, FanDuel, BetMGM, Caesars, Fanatics, theScore / ESPN BET, BetRivers, Hard Rock, Bally Bet, betPARXPriced and used in the market consensus. Not available in Georgia.
Usable from GeorgiaFliff and Rebet (sweepstakes), plus offshore booksSweepstakes books are priced like any book. Offshore books are shown for price comparison only: never linked or promoted.
Exchanges, prediction markets and sharp referencesKalshi, Polymarket, Novig, ProphetX, BetOpenly, Pinnacle, Betfair Exchange, Matchbook, Smarkets, MarathonbetExchanges and prediction markets are shown at your net price after the venue's published fees. Pinnacle and the exchanges anchor the Sharp preset.
Pick'em appsPrizePicks, Underdog, DK Pick6, DabbleLines only. A pick'em line is never treated as odds; its price comes from the app's payout table.

Middles apply to spreads, totals, team totals, player props with a line, and their alternates.

Sports the collector is built for: NFL, college football, CFL, NBA, WNBA, college basketball, NHL, MLB, KBO, NPB and soccer (Premier League, MLS, La Liga, Bundesliga, Serie A, Ligue 1, Champions League). What you see on a given day depends on what is in season and what the books have posted.

Pregame only. There are no live odds anywhere on the site, and a game drops off every tool at its start time. Refresh speeds up near the start: game lines every minute inside 2 hours, every 5 minutes from 2 to 12 hours, every 15 minutes from 12 to 36 hours and every 3 hours beyond; props every 5, 15 and 60 minutes in the first three windows. A credit budget guard slows the far windows first if credits run low. The ● Live · 12s badge in the top bar shows the true age of the newest collector run and turns amber (Delayed) when it is older than it should be.

What to check before you bet

  • The probability of the middle, not just the window size.
  • Push rules at whole-number lines.
  • Key numbers on football spreads, where the shape of the ladder matters most.
  • Both prices at the book before staking.

How to use it

  1. Open Middles and pick your books with the Book: selector; filter by league, market or a minimum EV (EV ≥ 1% and so on).
  2. Set your Target bet; each pair gets equal-payout stakes.
  3. Expand a row for the outcome table, or click it for the stake calculator with Middle hits, Push and the EV.

Open Middles

Free with a free account during launch: sign in with Discord. Calculators and guides need no account.

Open MiddlesHow to use it

Frequently asked questions

Is a middle free money?
No. Most middles lose a little when they miss and win a lot when they hit. Whether that's positive depends on the probability of landing in the window, which is what the EV column shows.
Where does the middle probability come from?
From the fair ladder fitted across every book's main and alternate lines for that market, the same one the +EV screen uses.
Can a middle also be an arb?
Yes. When the prices are good enough that no result loses, the pair also appears on Arbitrage with a + middle tag.
Is it free?
During launch the market tools are free with a free account: sign in with Discord. The calculators and the Learning Center are always free and need no account.

Free calculators for this

Arbitrage calculatorLocked return and stake split for 2- or 3-way arbs, net of exchange fees.Hedge calculatorStake to lock equal profit or break even on an open bet.No-vig fair odds calculatorFair odds with five devig methods side by side, 2- to 6-way markets.

Other tools

Odds Screen LiveEvery book's price on one row, the best one marked, and the no-vig fair line beside it.Sportsbook Props LiveEvery player prop and alternate line at your books, priced against a fair line built without that book.Game Lines LiveMoneylines, spreads, totals, team totals and alternates priced against the market's fair line.+EV Sniper LiveEvery market at every book on one board, ranked by expected value.Fantasy Props LiveEvery pick'em leg priced against the sportsbook market and the app's real break-even, with a slip builder and the best slips by EV.Parlay builder LiveThe best 2- to 6-leg parlays at one book, built from legs that are each +EV against the market, with same-game pairs checked.