I had this as one of my saved queries for a couple years and saw it showed up in the SportsBook Breakers Friday Football Tipsheet this week.
Pretty simple really, play the UNDER anytime the Steelers are on the road and facing a team that passes a lot (at least 34.7 passes attempted/game). The only added parameter is that they are not huge favorites (line is less than -13). I am positive I posted this here at some point in the past, pretty sure it was last season. I Can't post a link to the SDQL, but it is 0-26 O/U! My favorite part of this query is they are all with the same head coach.
Pittsburgh/Chargers UNDER is the play.