Bankroll / unit sizing
A unit is one consistent bet size, set as a small percent of your bankroll, so a cold streak cannot wipe you out and a hot one does not get reckless. Most disciplined bettors run 1 to 3 percent per unit. Set your bankroll and unit percent, then enter how many units a play is worth to get the dollar stake and how many losers in a row you could survive.
Unit $ = bankroll × unit % · Stake = unit $ × units · Max losers ≈ bankroll / unit $
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.