Of course, that is not the only factor in Rangers’ turnaround, but the appointment of Scott Fry as set-piece coach in November was a shrewd one.
His previous club Lincoln City scored 30 goals from set-pieces last season, the most in League One, and his expertise has also been evident since his move north of the border.
When Rangers win a free-kick or corner, Rohl withdraws from the touchline, Fry emerges and takes charge to increasing effect.
In a league where many teams often sit in against the bigger clubs, small margins are vital and Rangers have scored seven league goals from corners in 10 games since Fry was appointed.
Towering defender Emmanuel Fernandez – a bit-part player in the early stages of the season – has been used to great effect, scoring four times in the league, three of those in games won by a single goal.
Only Dundee United and Hearts have scored more set-piece goals than Rangers (12) this term and no team top the Ibrox outfit in that statistic since Fry’s arrival.
Indeed, they are now only one shy of the set-piece goals tally they registered in both of the previous two season.
Aberdeen would have travelled down to Glasgow on Tuesday well aware of the dangers Rangers now pose, but Emmanuel Fernandez and Nicolas Raskin nodded home two in-swinging Connor Barron corners and Rohl’s side claimed three more valuable points.
It seems an obvious way to get an edge on the competition, but Rangers are doing it better than anyone else right now.