The Trotters were unable to fill their bench for much of January and took only one point from their previous five games to drop away from the European places.
Coyle recruited defender David Wheater and Chelsea loanee Daniel Sturridge to boost the numbers and the latter proved the match-winner with an injury-time strike after a terrible back pass from Wolves defender Ronald Zubar.
Coyle felt it was just desserts for his side, saying: "We haven't had any luck in the last month. Probably everything that could conspire against us has gone against us.
"We've worked very hard in the January window, I think it's been a very good window for us. We've kept the group together, as I stressed all season we would, and we've added to that.
"It wasn't easy to leave David Wheater out given he had a quality debut in the FA Cup on Saturday against Wigan. It wasn't easy to leave Robbie Blake out of the 18 but that's because we've built up the squad. That gives me some selection dilemmas but as a manager I've shown all throughout my career I'm not afraid to make big decisions."