• 0.5 baseline — 0.6 × season 0.5 (4 gm) + 0.4 × last 10 0.5
• −0.0 opponent leak — they concede 9.3/game vs a 9.7 league average
• −0.1 at this ground — averages 0.4 there (9 gm)

Most signals here point under while you're on the over — worth reading the working above before you commit.

Derived, not measured — plain arithmetic over his real games, shown in full. Adjustments can overlap (a game at this ground can also be a wet one); they add simply, and this note is the admission.