What do decimal odds mean?
Decimal odds are the European standard. A €100 bet on 2.10 odds returns €210 if it wins (€110 profit + €100 stake). A €100 bet on 1.40 returns €140 (€40 profit). Implied probability is 1 ÷ odds: 1.40 odds imply ~71% probability; 2.10 odds imply ~48%.
What does +150 / -200 mean (American odds)?
American (moneyline) odds: positive numbers show the profit on a $100 bet (+150 = $150 profit on $100 stake), negative numbers show how much you must stake to profit $100 (-200 = bet $200 to profit $100). Decimal equivalents: +150 ≈ 2.50 decimal; -200 ≈ 1.50 decimal.
How does the bookmaker margin (vig) work?
Bookmakers price both sides of a bet so the implied probabilities sum to >100%. The excess is their margin. CS2 match odds typically have 4-6% margin (so two-way implied probability sums to 104-106%). Compare odds across multiple licensed sportsbooks — line differences of 5-10% are common and compound across a season.
