Kelly stake
Kelly sizes a bet in proportion to the edge you actually have, so it grows the bankroll fastest over time without risking ruin. Enter your honest win probability (your read, not the book's), the price, and your bankroll. Full Kelly is the theoretical optimum but swings hard, so most bettors stake a fraction of it. If there is no edge at the price, Kelly says pass.
b = decimal − 1 · f* = (b·p − q) / b · stake = bankroll × fraction × max(0, f*)
Kelly is only as good as your probability estimate. Overstate your edge and you over-bet toward ruin. Full Kelly is volatile; many bettors use a quarter to a half. Never stake money you cannot afford to lose. 21+. Not financial advice.
Market-neutral utility. It computes numbers you supply, it does not predict outcomes or guarantee profit. Compare lines across books and make the call yourself. 21+ · research, not advice.