Middling

Middling is a sports betting strategy where you bet both sides of a game at different point spreads, creating a window where both bets can win. For example, you bet Team A -3 early, and later the line moves to -6, so you bet Team B +6. If Team A wins by 4 or 5, both bets win.

Successful middling requires tracking line movement to identify games where the spread has shifted significantly. The middle window depends on the size of the movement. A 3-point middle (covering 3 possible outcomes where both bets win) is more valuable than a 1-point middle.

Middling carries a cost: if the result falls outside the middle (which happens most of the time), you lose the vigorish on one bet while winning the other, resulting in a small net loss. The expected value depends on the size of the middle window and the probability of the result landing within it.