Arbitrage
Backing every outcome of a match at different books when the inverse odds add up to less than 1, so every result returns the same payout. Odds of 2.12 and 2.08 sum to 0.9525, a 4.75% margin before stake limits and settlement differences.
CS2 betting definitions
CS2 betting glossary for safer research
Definitions used across SkinBetHub guides, tools, partner checks, and daily CS2 pick notes. Each term links to the guide or calculator that covers it in depth.
Bankroll
The amount of money or skin value a bettor sets aside for betting. SkinBetHub treats bankroll as risk capital, not money needed for bills or savings.
BO1 and BO3
A BO1 (best of one) is a single map. A BO3 (best of three) goes to the first team to win two maps. A team that wins 60% of individual maps wins a BO3 about 64.8% of the time, so favorites are more reliable in longer series.
Bookmaker margin
The edge a bookmaker builds into its prices, also called overround or vig. Add the implied probabilities of every outcome: the amount above 100% is the overround. Odds of 1.83 and 2.05 add up to 103.43%, a 3.43% overround.
Closing line value
A comparison between the price taken and the final market price before the match starts. It can show whether the bettor regularly beats market movement, but it does not guarantee profit.
Decimal odds
The total return for every 1 unit staked, including the stake. Odds of 1.80 return 1.80 per 1 staked, which is 0.80 of profit. Divide 1 by the odds to get the implied probability.
Expected value
The average profit per unit staked if the same bet were repeated many times: p x (odds - 1) - (1 - p). At odds of 1.85, a 56% win chance gives +0.036 units per unit staked. A bet with negative expected value loses money over time.
Hit rate
The share of settled picks that won, with voids excluded. Hit rate means little without the odds: at average odds of 1.50, a 66.7% hit rate only breaks even.
Implied probability
The win chance a price implies, calculated as 1 divided by the decimal odds. Odds of 2.00 imply 50% and odds of 1.50 imply 66.7%. Because of the bookmaker margin, the implied probabilities of all outcomes add up to more than 100%.
Map veto
The process teams use to remove and select maps before a CS2 match. Veto context can change a pick because teams have different strengths across maps.
No-edge skip
A decision to avoid betting when price, team context, data quality, or risk is not strong enough. SkinBetHub treats skip calls as part of the research process.
No-vig probability
An estimated fair probability after removing bookmaker margin from the market. It helps compare a quoted price against a cleaner baseline.
Prediction market price
A market-implied probability from a contract price. CS2 prediction-market prices can be useful research signals, but liquidity, spread, and settlement rules matter.
Provably fair
A system where a site publishes a hashed server seed before a roll, so the player can later check with the server seed, client seed, and nonce that the result was not changed. It proves the roll was not altered after the fact, not that the odds or house edge are fair.
ROI
Return on investment: total profit divided by total amount staked. 7.5 units of profit on 60 units staked is a 12.5% ROI. ROI is a better measure of a betting record than hit rate because it accounts for the odds.
Rollover
The amount of wagering required before a bonus or promo balance can become withdrawable. Rollover terms should be checked before claiming any offer.
Skin value risk
The risk that CS2 skins used for deposits, wagers, or withdrawals may change in market value, carry trade friction, or become difficult to liquidate.
Tipster record
A public history of picks, odds, stakes, confidence notes, and results. A useful record includes losses and skipped bets, not only wins.
Unit
A fixed stake size used to record betting results independently of bankroll size. SkinBetHub scores every pick at a flat 1 unit, so a win at odds of 1.60 adds 0.60 units and a loss subtracts 1.
Withdrawal friction
Anything that makes withdrawing funds or skins harder, including KYC delays, unclear limits, excluded payment rails, country restrictions, or bonus lockups.