A little knowledge. A better bet.

Choose the sportsbooks you actually use. Record your current cash balance at each book as a deposit in the tracker. Start with an amount you can afford to lose, and keep money for living expenses separate. Your selected state is context, not a guarantee of platform or promotion eligibility.

A $200 bonus at +250 returns $500 in winnings if it wins, when the bonus stake is not returned. Hedging the opposite outcome at -300 requires $375 cash. Under normal matching win/loss settlement, the net result is $125 either way. Check eligible markets, expiry, minimum odds, whether the stake is returned, and any further wagering requirement.

Arbitrage exists mathematically when the implied probabilities across all exhaustive outcomes sum to less than 100%. A low-hold pair can still cost money. Different lines, periods, void rules or hockey overtime treatment can invalidate a pair. Confirm both accepted stakes and prices; a quote on our screen is not an accepted ticket.

BookNemesis removes the overround from paired reference prices, then takes the median probability from at least three other sportsbooks at the same line. That is a market-derived estimate, not independent proof of the true chance. Reference books may share pricing inputs. Positive expected value does not imply a particular bet will win.

A more favorable line is a useful research clue. It does not establish the value of a multi-pick entry. Review the exact entry type, payout table, special multipliers, tie and DNP rules, and correlations between picks. Our beta compares lines and publishes human-reviewed entries; it does not calculate automated entry EV.

Log every leg, including losses. Use a shared group name for hedges, but settle each ticket separately. Deposits are cash movements, not profit. A bonus loss does not subtract its face value from cash. If a book reissues a voided bonus, record the replacement only when you use it.