Track your bets and measure whether your edge is real

A sports betting bet tracker should tell you two things: what you won or lost, and whether the prices you took were any good. The first is your profit and ROI. The second is closing line value (CLV), and it's the one that tells you whether results will last. The quant+ bet journal records both. Log a bet with one click from any price, or import a spreadsheet, and the journal grades it automatically, captures the fair price when you bet, and measures CLV against the de-vigged closing line.

Most trackers stop at win-loss and units. That's like judging a trader only by last month's P&L.

What the journal records for each bet

Every bet row shows:

• Placed (date and time), Selection, Book, Odds and Stake.
• Result and P/L: won, lost, push, void, half won, half lost or cashed out.
• EV: the expected value at the moment you bet, measured against the fair price.
• CLV: how your price compares with the fair closing price.

Above the table, tiles show open bets, profit, ROI, win rate, average CLV and average EV at bet time.

Three ways to get bets in

1. One click from any price. On the odds board, the +EV scanner or the props board, click a price and the bet is logged with the book, odds and the fair probability at that exact moment.
2. The "Log a bet" form for singles or parlays, with tags and notes ("live", "model", "steam", whatever you want to slice by later).
3. CSV import. Bring the history you already keep in a spreadsheet. Map your columns (placed date, selection, stake, odds, sportsbook, result, payout or cash-out, bet ID) once, and the journal reads the rest.

quant+ never connects to your sportsbook accounts. You record the bets you placed elsewhere; nothing is pulled from or sent to a book.

Automatic grading

Bets are settled automatically from game results, so you don't have to come back on Monday and mark forty rows. If you settle a bet by hand (a cash-out, a void the book applied), the journal leaves your result alone.

How closing line value is measured

CLV compares the price you got with what the market thought the bet was worth at the close. quant+ calculates it as:

CLV = closing fair probability × your decimal odds − 1

The closing fair probability comes from removing the margin from the closing line, using sharp books first and the consensus of the board otherwise. quant+ uses the power method for this; a study in the American Journal of Sports Science found the power method beat simple normalization and matched or beat the Shin method across three large datasets.

Three examples (illustrations, our arithmetic):

Your bet	Decimal odds	Closing fair probability	CLV
+120	2.200	50.0%	0.500 × 2.200 − 1 = +10.0%
-110	1.909	54.0%	0.540 × 1.909 − 1 = +3.1%
-110	1.909	50.0%	0.500 × 1.909 − 1 = −4.5%

CLV is calculated for single bets. Parlays get a result and P/L but no CLV, because there's no clean closing price for a combination.

Why CLV matters more than your record

Closing prices are good forecasts. A PLOS ONE study found that betting odds predicted results better than various quantitative models. If you regularly get better prices than the close, you're beating a strong forecaster at the moment you bet, whatever happened in the game.

Your win-loss record is noisy for a long time. Fifty bets at around even money can easily run several games above or below expectation by chance. Streaks are also harder to judge than they feel: Miller and Sanjurjo showed in Econometrica that the usual way of measuring what follows a streak carries a subtle but substantial bias. A hot week tells you very little. Average CLV over a few hundred bets tells you much more.

Find out where your edge actually is

The performance page breaks everything down so you can stop doing what doesn't work:

• Cumulative profit over time.
• Rolling CLV across your most recent graded bets, so you see if your price quality is slipping.
• Breakdowns by book, league, market, bet type, tag and workspace member.

Common things people find: their props have positive CLV but their parlays don't; one book keeps giving them stale prices; their "gut" tag trails their "scanner" tag. You can only see that with the data in one place.

Privacy

Bets belong to your workspace and are visible only to its members. The quant+ Copilot answers questions from public market data only, so your journal is never sent to the model.

Use it to set limits, not only to measure edge

A tracker is also the simplest responsible-gambling tool there is. The National Council on Problem Gambling recommends that you determine a budget before placing any bets and set a time limit, and never chase losses. With every bet in the journal, you can see your total staked this week next to the budget you set. Americans bet $166.94 billion with regulated sportsbooks in 2025, according to the American Gaming Association. At that scale, a written record of your own share is the least you should keep.

If you notice you're betting more than you planned, stop. The National Problem Gambling Helpline is available around the clock.

Start tracking

Import last season's spreadsheet, or start logging from the board today. After a month, check your average CLV before you look at profit. The +EV scanner and the quant+ guides explain fair prices if you're new to them, and the risk disclosure covers what analytics can and can't do.

Start free to open the bet journal, or see the terminal on the home page.

Quant+ is analytics for informational purposes. 21+. If you or someone you know has a gambling problem, call 1-800-GAMBLER.