Moyes is confident that the former Olympiakos man will influence more matches in the Blues' favour during the run-in.
"Sometimes it can take a little bit of time for players like that to settle and I think there has been a little bit of time with him," Moyes told evertonfc.com.
"The opening games he did very well but got injured. He's just beginning to find a little bit of form and look like the player he was at the beginning of the season.
"When he joined he looked as though he settled in quickly, and against Manchester City and today he showed signs that he is getting back to the way he was.
"He's been out a long time with injury and he is just beginning to regain a bit of confidence.
"He's different because he's a sort of wide striker and bits of his game are different than what we've been used to."