**lika para��:**
How the bookies calculate the odds.

Understanding how bookmaker odds are formed is necessary for any bettor, even if the bets in the bookmaker are not considered as a source of income.

How the bookies calculate the odds

Some bookmakers build their own line, some take someone else's and then adjust it at their discretion. Most Russian bookmakers have a purchase line, because it is very expensive to maintain analytical departments.

The General formula is the same for all bookmakers. First, the probability of an outcome is assessed. For example, in the match" Juventus " — " Sampdoria "bookmaker believes that the chances of" Juve "to win 50%," Sampdoria " will win with a probability of 20%, another 30% remain in a draw.

Then convert the percentages to fractional values: 50%=0,5, 20%=0,2, 30%=0,3

To get the coefficients, divide one by the obtained values:

1/0.5=2

1/0.2=5

1/0.3=3.33

These are pure odds without betting margin, you will not find them in any office. Otherwise, the betting business wouldn't make any sense. Betting margin-the percentage by which the bookmaker

Pin-Up reduces the coefficient and its risk, gaining an advantage over the player. You can check the betting margin in the line by the formula:

Betting margin = (100/K1+100/K2)-100

K1 and K2 are coefficients for the first and second teams. For events with three outcomes, another term 100/K3 is added.

A fair margin percentage is 2-5% (odds on equally probable outcomes 1.9-1.9), all that is above 10% — this is a form of robbery.

What affects the coefficients of sports events

After the publication of the line, the odds for sports events may vary depending on the volume of bets on a particular outcome. This process is called line motion. Changes in quotations of bookmakers compensate for the imbalance in betting on one outcome, protecting yourself.

If the coefficient decreases gradually, it means that the bettors who choose bets on big names and favorites "load" the victory of one of the teams or another outcome.

But if the quotes fall sharply, just a few tenths, we are talking about a large rate from professionals who are looking for errors in the line. A sharp drop in the coefficient can be caused by unfair play, for example, suspicions of the contractual nature of the match.