Tracking Your Picks: Closing Line Value and Grading

By ArchivePicks · Published 2026-10-28

Research is easier to trust when you keep a record of it. If you look at a player prop and form a view, writing down what you saw and then checking what happened is the only way to find out whether your method is doing anything. This article covers what to record when you track a line, how to grade the result, what closing line value means, and why a short record tells you much less than it feels like it does.

None of this requires special software. A spreadsheet works. ArchivePicks is a research tool and does not make selections for you, so the record you keep is about your own process.

What it means to track a line

Tracking a line means saving the facts about a prop at the moment you looked at it, so you can compare them with the outcome later. At minimum, record:

• The player, stat and game. For example, Player X, receiving yards, Sunday.
• The line. 64.5 yards.
• Your side. Over or under.
• The price, if there was one. Over -115, under -105.
• The time and source. Lines move, so "64.5 at 9 a.m. at Book A" is a different fact than "64.5."
• The reason in a sentence. For example, "L10 hit rate 7 of 10, opponent allows above-average receiving yards to the position."

The reason matters more than people expect. Months later it lets you ask whether a type of reasoning, such as leaning on L5 form, actually held up. The line and time matter because the same player can have different numbers at different books and times, as covered in comparing player props across books.

Grading a result: hit, miss or push

After the game, compare the player's actual stat with the line and your side.

• Hit. Your side was right. Over 64.5, player finished with 70.
• Miss. Your side was wrong. Over 64.5, player finished with 58.
• Push. The stat landed exactly on a whole-number line. Over 65, player finished with 65. Nobody wins, and a bet stake is normally returned. Half-point lines cannot push. See player prop lines explained.
• Void or no action. The player did not play, or the stat was not recorded. Operators have their own rules about this, so check them. In your own record, leave the entry out of your hit rate rather than counting it as a miss. This follows the same logic as the hit rate on ArchivePicks, which leaves unrecorded games out instead of treating them as zeros.

Decide in advance how you will count pushes and write the rule down. Suppose you have 10 graded entries: 5 hits, 4 misses and 1 push. If pushes are excluded, your record is 5 of 9, or 55.6%. If pushes count as non-hits, it is 5 of 10, or 50%. Neither is wrong, but switching between them as you go would make your record look better or worse than it is.

Closing line value

The closing line is the last number and price before the game starts. Closing line value (CLV) compares what you saw earlier with that closing market. The idea is that the closing line usually reflects the most information, including news, injuries and betting volume, so if you tend to see numbers that the market later moves toward, you may be reading information faster than the average.

There are two common ways to measure it.

By the line. You noted the over at 64.5. The line closed at 66.5. The market moved toward the over by two yards, which is favorable for an over. If it closed at 62.5, it moved against you.

By the price. The number stayed the same but the price moved. Suppose you saw the over at 64.5 with a market of -105 / -115 (over / under), and it closed with the over at -125 and the under at +105.

1. Your entry: over -105 implies 105 / 205 = 51.22%, and under -115 implies 115 / 215 = 53.49%. Total 104.71%. Fair over = 51.22 / 104.71 = 48.92%.
2. Closing: over -125 implies 125 / 225 = 55.56%; under +105 implies 100 / 205 = 48.78%. Total 104.34%. Fair over = 55.56 / 104.34 = 53.25%.
3. The market's fair chance of the over rose from 48.92% to 53.25%, a move of about 4.3 percentage points in the direction of your side.

That is positive CLV on the price. It says the market later agreed with the side more than it did when you looked. The no-vig step is explained in what is a no-vig price, and the conversions in implied probability explained.

What CLV does not tell you

• It is not a result. A positive CLV entry can still lose, and a negative CLV entry can win. CLV is a statement about the market, not about the single game.
• Prop closing lines are rougher than main markets. Prop markets are thinner and often have lower limits, so the closing prop line may reflect less information than a point spread does.
• It needs data you may not have. To compute it you need the closing numbers, which means saving them at close or finding a reliable archive. See line movement: what it can and cannot tell you.

Why small samples mislead

This is the most important section. A record of 12 hits from 20 entries feels like 60%, and 60% feels like a skill. The numbers do not support that yet.

If every entry were a pure coin flip, the chance of getting 12 or more hits in 20 is 263,950 in 1,048,576, about 25%. That is roughly one run in four from luck alone. A 12-8 record is entirely ordinary for a person with no edge at all.

Another way to see the width of the uncertainty: for a 50% process, the standard deviation of the hit rate over n entries is the square root of 0.25 / n. For 20 entries that is about 11 percentage points. For 100 entries it is 5 points. For 400 entries it is 2.5 points. Ordinary variation is about two standard deviations either way, so with 20 entries, anything from roughly 28% to 72% fits a coin flip. Only after hundreds of entries does a record start to narrow down.

The break-even point matters too. If you take -110 prices, you need above 52.38% just to break even, a margin of 2.4 points over a coin flip. To see something that small against 2.5-point noise, you would need on the order of several hundred entries and even then it would be uncertain.

Practical consequences:

• Do not change your method after a bad week. Ten entries cannot tell you much.
• Do not trust a good week either. Same reason.
• Do not cherry-pick. Track every entry you considered, including the ones you skipped for no recorded reason, or your record will quietly reflect only the stories you liked.

A simple tracking routine

1. Before the game, log the player, stat, line, side, price, time and a one-sentence reason.
2. After the game, enter the actual stat and grade it as hit, miss, push or void.
3. If you can, add the closing line and price.
4. Review in batches of at least 50 to 100 entries, not after each game.
5. Compare your hit rate with the break-even point for the prices you saw, not with 50%.

ArchivePicks gives you lines, hit rates and game logs to inform your own research. It does not take bets, give picks or guarantee results, and past results do not predict future ones. If you bet, do so only if you are of legal age where you live (18+ in some places, 21+ in most US states), keep it within a budget you can afford to lose, and never chase losses. In the US, free and confidential help is available at 1-800-GAMBLER; see the responsible gambling page for more.