Question 1

Does value betting actually work?

Accepted Answer

The arithmetic is sound: a price longer than the true chance justifies has positive expected value, and over a long run of such bets the average outcome is positive. What is not sound is the assumption that a bettor can estimate true chances better than a well-traded market. For most people the estimate is the weak link, and the honest answer is that the method works if and only if the estimate does.

Question 2

What is closing line value in one sentence?

Accepted Answer

Closing line value is the difference between the implied chance of the price you took and the implied chance of the same selection at the moment the market closed, expressed in percentage points. Positive means you took a longer price than the market finally settled on.

Question 3

How long does a sample need to be before I know if I have an edge?

Accepted Answer

To read a signal from win and loss results, you would need hundreds to thousands of bets depending on the size of the edge, which almost no recreational bettor will place. That is precisely why closing line value is used instead: it has far less variance, so a readable signal appears from tens of bets rather than thousands.

Question 4

Is an edge of a few percentage points enough to make money?

Accepted Answer

Only relative to the margin you are paying. A two-point edge at a price inside a 4.7% margin is not enough to break even. The margin is taken from every price, so the edge has to clear the margin before anything is left over — which is why studying expensive markets is a poor use of effort.

Question 5

Why does my record look worse than my reasoning?

Accepted Answer

Almost always because variance dominates a short sample. A bettor winning 55% of even-money bets will still see five-loss runs regularly. The other possibility is that the reasoning is wrong, which is why a record should include the estimated chance and the closing price for every bet — those two fields can be audited; results over a small sample cannot.

Question 6

Can I use a betting record to prove I have an edge?

Accepted Answer

Not from a recreational sample of results. A record can show whether you consistently beat the closing line and whether your process is consistent; it cannot show that you are profitable in expectation. Treating a good month as proof of an edge is the same error as treating a bad month as proof of no edge.

Question 7

What is the single most common mistake in value betting?

Accepted Answer

Treating the market as wrong before checking whether you are the one missing information. A price that looks obviously generous is usually a correct response to something the observer has not seen — a fitness doubt, a rule about settlement, or a change in the event. The second most common is moving the estimate to match a bet you already want to place.

Questions people actually ask about value betting

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