Coyle is keen to bring in a new striker and a winger before the current transfer window closes at the end of this month.
“People lined up to tell us there was no Jack Wilshere, we’ll struggle, now they’re saying there’s no Daniel Sturridge or Johan Elmander,” Coyle told the Bolton News.
“We have to make sure we evolve, and if that means we have to change a few things, then that’s what we’ll do.
“People have seen we’re up against the champions of the Championship and then five of the top six in our next seven games and written us off.
“You’ve seen a great performance from a group of players we’ve still got to add a couple of names to, and a couple of injuries to come back in.
“We need strength in depth. I’d like to add another striker and a winger. You probably know who they are but finances will play a part in all that.”