Closing line value: compare the same contract at two times
Closing line value compares the price or line you recorded with a defined closing benchmark. A useful comparison needs matching contracts, timestamps and a declared formula.
Define the close before inspecting the result
Choose the reference venue, market, closing cutoff and margin-removal method in advance. For example, use the last available pre-event quote from one named source, with its timestamp and age. Record missing or suspended markets as missing. Do not quietly replace them with whichever later quote makes the original selection look best.
A displayed quote, an accepted ticket and a public recommendation are different records. Preserve the time and price for each relevant step. A favorable price visible before posting does not prove that members could obtain it afterward.
Separate a raw price ratio from a probability benchmark
| Comparison | Calculation | Result |
|---|---|---|
| Recorded decimal price | Accepted ticket | 2.20 |
| Closing quoted price | Same outcome, same rules | 2.00 |
| Raw price ratio | 2.20 ÷ 2.00 − 1 | 10% |
| Model return at a 50% benchmark | 0.50 × 2.20 − 1 | 10% |
The raw ratio is a descriptive comparison, not a measured investment return. The last row interprets the closing benchmark as a 50% probability. That interpretation needs justification: a quote of 2.00 alone does not establish a margin-free probability of 50%.
If both sides close at 1.91, proportional normalization of the complete two-way market gives 50% each, while either raw implied chance is about 52.36%. Label which method you use. The linked EV example uses the hypothetical 50% benchmark and a $10 stake, producing +$1.00 model EV; it does not retrieve closing data.
A changed line is a changed contract
Team A −2.5 and Team A −3.5 differ when the final margin is exactly three. You cannot convert that one-point difference into a percentage edge using decimal-price division alone. You need a distribution over margins or a comparable quote for the original threshold, with the same settlement rules.
At identical odds, −2.5 wins in all the cases where −3.5 wins, plus the three-point margin. That ordering is clear; the probability mass at three is not supplied by the point difference. The same issue applies to a player prop moving from 24.5 to 25.5.
Use a series, not a victory label
A ticket can beat the closing quote and lose. Another can receive a worse price and win. Record both price comparisons and settlements across the entire declared sample. Report how many picks lack valid closing data and whether those omissions concentrate in a sport or market.
Closing prices are benchmarks, not guaranteed truth. Changes in available information, margin, liquidity or market definition can undermine an easy interpretation. This guide specifies an audit procedure; CashCord does not currently publish a measured CLV record.
Try the numbers yourself.
Open the calculator with this guide’s example inputs. Change one assumption at a time and see what changes.
Open expected value calculatorCommon questions
Does positive CLV guarantee long-term profit?
No. The benchmark can be imperfect, the sample incomplete, and the measured contracts mismatched. Realized outcomes and uncertainty require separate reporting.
Does CashCord collect the closing line automatically?
Not in the current public preview. No closing-price feed or measured CLV dataset is connected.
Sources and example scope
The benchmark definition and numerical cases are original illustrations. The operator source supports the distinction between displayed and accepted prices in its live-bet workflow; it does not validate a CashCord CLV model.