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Regression to the Mean

A statistical phenomenon where extreme results tend to move closer to the average over time. In betting, a team on a long winning streak is likely to see their performance normalize. Understanding regression helps bettors avoid overreacting to short-term results and identify value where the market has overcorrected.

Related Strategies Terms

Return on Investment (ROI)
A percentage that measures the profitability of your betting relative to the total amount wagered. Formula: ROI = (Total Profit / Total Staked) x 100. For example, if you bet $10,000 total and made $500 profit, your ROI is 5%. A positive ROI indicates long-term profitability. Professional bettors typically achieve 2-10% ROI.
Fading
A contrarian strategy of betting against the public or popular opinion. The theory is that bookmakers shade their lines toward the popular side, creating value on the less popular outcome. Fading works best in high-profile events where public money heavily influences the line in one direction.
Unit Size (Unit)
A standardized bet amount used to measure and compare betting performance. One unit typically represents 1-2% of your total bankroll. Using units allows bettors to track performance consistently regardless of the absolute amounts wagered. For example, being up 50 units conveys a clear picture of profitability.
Yield
Another term for ROI in betting, representing the average percentage return per bet. Calculated as (Total Profit / Total Staked) x 100. A 5% yield means you return an average of $0.05 for every $1.00 wagered. Yield is the standard measure used to evaluate and compare tipster performance.
Value Betting
A strategy where the bettor identifies and bets on outcomes where the bookmaker's odds are higher than the true probability warrants. A value bet exists whenever the offered odds exceed the fair odds. Over time, consistently placing value bets leads to profit regardless of individual results. This is the core principle behind professional sports betting.
Line Shopping
The practice of comparing odds across multiple bookmakers before placing a bet to find the best available price. Even small differences in odds compound into significant profit over time. For example, getting 2.10 instead of 2.00 on hundreds of bets dramatically improves your long-term return. Line shopping is one of the simplest edges available.
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