What should you record for CLV?
Record the no-vig price when you bet and the no-vig closing price for the same market. Use the same side, same line, and same market type.
The goal is apples to apples. Comparing a juiced open to a listed close can distort the answer, because book margin moved along with the price.
Record the no-vig price you bet and the no-vig closing price; positive average gap across many bets = you're beating the close. A practical workflow keeps the math in one order. Price the market first, convert everything to probability, compare against your projection, and only then think about stake size. Reversing that order is how bettors talk themselves into action before they know whether the number is actually playable.
How do you measure the closing-line gap?
Devig both prices, then calculate the difference between the fair probability you bet and the fair probability at close. Positive average gap means you beat the close.
For spread and total markets, line movement matters too. A better number and a better price both count, but keep the comparison consistent so the tracking does not become a highlight reel.
Record the no-vig price you bet and the no-vig closing price; positive average gap across many bets = you're beating the close. A practical workflow keeps the math in one order. Price the market first, convert everything to probability, compare against your projection, and only then think about stake size. Reversing that order is how bettors talk themselves into action before they know whether the number is actually playable.
For product work, keep the loop explicit: use No-Vig Calculator and Kelly Criterion Calculator for the math, then use CLV Tracking Guide to audit the assumptions behind the number.
Why is CLV stronger evidence than short-term profit?
Profit is noisy. A good bet can lose and a bad bet can cash, because sports outcomes are very committed to being inconvenient.
CLV tells you whether the market later agreed with your side. Across many bets, beating the close is one of the cleanest signals that your edge is real before the profit curve behaves.
For product work, keep the loop explicit: use No-Vig Calculator and Kelly Criterion Calculator for the math, then use CLV Tracking Guide to audit the assumptions behind the number.
Write the inputs down before the bet: market price, fair probability, model probability, edge threshold, stake fraction, and the reason the number could be wrong. That small audit trail makes it much easier to separate a good losing bet from a bad winning one.
How many bets should you evaluate?
Do not overreact to a handful of bets. CLV needs a sample large enough to smooth out market noise, stale closes, and one-off injury moves.
Track it continuously. If your average CLV stays positive while your process remains consistent, that is a strong sign your numbers have bite.
Write the inputs down before the bet: market price, fair probability, model probability, edge threshold, stake fraction, and the reason the number could be wrong. That small audit trail makes it much easier to separate a good losing bet from a bad winning one.
Which tools and guides support this answer?
What else should bettors know?
Should CLV be tracked with listed odds or no-vig odds?
Use no-vig odds when possible. Devigging both the bet price and closing price removes sportsbook margin and gives a cleaner comparison.
Can I have positive CLV and still lose money?
Yes, especially over smaller samples. Positive CLV suggests good prices, but outcomes can lag the edge because variance does not care about your spreadsheet.
Does SharkSnip support CLV tracking?
Yes. SharkSnip includes CLV tracking so bettors can measure whether their bets consistently beat the market close.