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CLV measures whether the line moved in your favor between the time you bet and the time the game started. Beating the close consistently is the single most respected long-run signal among professionals because it is far less noisy than short-term win rate.

CLV_bps = ((closing_decimal / opening_decimal) - 1) * 10,000

American odds convert to decimal as: positive odds give 1 + odds/100, negative odds give 1 - 100/odds. A pick at +110 (decimal 2.10) closing at +100 (decimal 2.00) loses roughly 476 basis points of CLV.

The book bakes a margin (vig or juice) into both sides of the line. Strip it out before deciding whether the price is worth taking. The no-vig fair probability is a much better baseline than the raw implied probability of the market.

p_a = imp_a / (imp_a + imp_b)
fair_decimal_a = 1 / p_a

Where imp is the implied probability of each side. At -110 / -110, raw implied is 52.4% on each side and the no-vig fair is 50% / 50%.

Full Kelly assumes you know your true probability with certainty. You do not. Quarter Kelly gives up about 25 percent of theoretical growth in exchange for dramatically lower variance and much better behavior when your probability estimate is wrong.

full_kelly = (p * (b + 1) - 1) / b
recommended_bet = bankroll * (full_kelly * 0.25)

Where p is your estimated win probability and b is decimal odds minus 1. Most professional bankroll managers run between quarter Kelly and half Kelly in practice.

A +110 vs +105 difference is worth roughly 50 units of ROI per year if you bet 10 times a week. Open accounts at multiple books and always check the spread before locking. Suggested priority order:

• 1. Sharp price source: Pinnacle for closing-line truth (international), Circa for U.S. retail size.
• 2. Two retail majors: DraftKings + FanDuel cover 95% of U.S. markets.
• 3. One promo book: BetMGM, Caesars, or Fanatics for boosts and rewards.
• 4. One props specialist: DraftKings has the deepest player-prop menu.

One unit equals 1% of bankroll for most recreational bettors and 0.5% for sharp accounts that take larger drawdowns into account. A 10-unit position at 1% means 10% of your bankroll on a single bet, which is aggressive even if you are CLV-positive.

Confidence-tier sizing example used by NuroPicks Pro:

Five books cover almost every realistic U.S. bettor's needs. Open all of them, line shop daily, and keep tier credit / loyalty programs in mind on the second-tier books.