Every board lets you move the number in your favour for a price. Whether that is a good deal is arithmetic, and mostly it is not.
Every board lets you move the number in your favour for a price. A -6.5 favourite can become -5.5 if you accept worse odds; an over of 47.5 can become 44.5. Whether that is a good deal is arithmetic, and mostly the answer is no.
Buying points means paying extra juice to shift a spread or total. An alternate line is the same idea offered as its own market rather than as an adjustment.
The half point costs about 4 percentage points of break-even rate. It is worth it only if an exact 6-point margin happens more often than that.
It does not. Six-point NFL margins occur in roughly 3-4% of games. Paying four points of break-even for a three-point gain is a losing trade.
Key numbers are the exception, and they are the whole reason this market exists. NFL margins cluster hard on 3 and 7 because of how scoring works.
| Margin | Approximate share of games | Buying across it |
|---|---|---|
| 3 | ~9-10% | Genuinely valuable |
| 7 | ~6-7% | Often worth it |
| 6 | ~3-4% | Usually not |
| 10 | ~3-4% | Usually not |
| 4, 5, 8, 9 | ~2-3% each | No |
Buying from -3.5 to -3 buys the most common margin in football. Buying from -4.5 to -4 buys almost nothing. Books know this, and they charge accordingly — which is why a half point off 3 often costs -135 or worse while other half points cost -120.
If the extra half point does not cross 3 or 7, you are almost certainly overpaying. Test it the same way every time: how often does the game land exactly on the number you are buying, and how much break-even rate did the price cost you?
A teaser is buying points on several bets at once, packaged as a parlay. A standard six-point NFL teaser moves every leg six points in your favour, at a reduced payout, and all legs must still win.
The well-known version takes favourites of -7.5 to -8.5 down through both 7 and 3, or underdogs of +1.5 to +2.5 up through both. Crossing two key numbers is what makes those specific legs different from every other teaser leg.
That does not make teasers automatically good. It makes the *specific legs that cross both key numbers* less bad than the rest, and it is a well-documented idea that books have priced against for years.
Selling points — taking a worse number for a better price — is the same calculation in reverse and is offered far less often, which tells you something about who the market is designed for.
Before buying anything, check whether another book already offers the number you want at standard juice. Moving from -6.5 to -6 for free by shopping beats paying -130 for it every single time.
Compare the alternate number's cost against the main line on the same board. Price an alternate line.