Prop Bet Tracker
Log every prop with the price you took and the price at the close, and the tracker shows your record, profit in units, ROI and closing line value, split by league, market, side and book. Results take hundreds of bets to mean much; beating the closing price shows an edge far sooner.
Your prop bets, the record and the close
Log each bet with the price you took and, before the game, the closing price. The tracker keeps them in this browser only: nothing is sent anywhere, so export a copy now and then.
| League | Bets | W-L-P | Profit | ROI | CLV |
|---|
The bets
| Date | Bet | Odds | Stake | Close | CLV | Result | Profit |
|---|
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CLV is the price you took against the closing price on the same side: −110 taken and −125 at the close is +6.1%. Profit counts settled bets only. The luck test treats every bet as winning exactly as often as its own price implies and asks how often that would leave you this far up; it is an approximation, and needs a few hundred bets to say much.
Why track every prop bet?
Because memory keeps the wins. A written record of every bet, at the price you actually got, is the only way to know whether you beat the books or only remember the nights you did. It also shows where any edge lives: a bettor who is up on NBA unders and down on NFL overs should bet more of one and less of the other, and only a record split that way can show it. The tracker splits by league, market, over or under, and book.
Log the bet when you place it, at the price you were filled at, not the one you saw first. Settle it when the game ends. Keep pushes: they leave the money where it was but still count as bets.
What is closing line value?
The closing line is the last price before the game starts, after the market has taken in the injury news, the lineups and the bets of the sharpest players. Closing line value is how much better your price was than that one. The tracker works it as the payout at your price over the payout at the close, less one: an over taken at −110 that closes at −125 is +6.1%, because −110 pays $1.909 for each $1 and −125 pays $1.800.
CLV matters because the result of one prop is mostly noise and the close is mostly signal. A bettor who regularly gets better prices than the close is betting into numbers the market later agrees were wrong, and over enough bets that turns into profit. One who regularly gets worse prices is usually losing, whatever the record says this month. Note the closing price from the same book and the same line you bet, just before the start.
How many bets until the record means something?
More than most people think. Under the stats boxes, the tracker asks how often a bettor with no edge, at the same prices and stakes, would be up as much as you are. Each bet is treated as winning exactly as often as its own price implies, which gives every bet an average profit of zero; the spread of the total over all your bets then gives the chance. Up 10 units after 100 bets at −110 and $1 units still happens to a bettor with no edge about 15% of the time. The same 10% ROI after 1,000 bets happens to one less than 0.1% of the time.
That is the case for logging CLV next to every bet: it says something within a few dozen bets that results need several hundred to say. The bet sizing calculator shows how far a real edge can still run below zero over a season, and how to survive a losing streak covers keeping your head while it does.
Where is the data kept?
In this browser only, in its local storage. Nothing is sent to Wager Wisdom or anyone else, and nobody here can see your bets. That also means clearing the browser's data deletes the record, and another browser or phone starts empty. Export a CSV now and then: it opens in any spreadsheet and imports back in, here or on another device. The tracker reads any CSV whose first row names the columns, as long as odds and stake are among them.
To check a price before you bet it, use the player prop odds calculator. More on finding the props worth logging: sharp NBA player prop strategy, NFL strategy for prop bettors and line shopping.
Sources: closing line value as explained by VSiN, Closing Line Value (CLV) in Sports Betting; the record, ROI, CLV and the luck test are arithmetic on the bets typed in (the luck test uses the normal approximation). Sports betting is for adults where it is legal in your state; a tracker that shows steady losses is worth listening to. If gambling stops being fun, call or text 1-800-MY-RESET.