The youngster has joined Championship side Brentford on a one-month loan deal, which has the potential to be extended should it prove to be successful for the 19-year-old.
Long is reported to have a bright future at Goodison Park, and made his first-team debut as a late sub in the Europa League tie with Krasnodar in December.
Now manager Martinez has admitted that he is confident there will be plenty more to see once he returns from his loan spell at Griffin Park.
"It's an important period, I think Chris is ready for that role," he said.
“I always felt, in pre-season when he came and joined the first team, that he has something special; that knack of making the right run and decision and scoring goals out of nothing.”
Brentford have been the surprise package of the Championship this season, currently sitting in fifth place, just four points from league leaders Bournemouth.
Catalan Martinez has obviously taken note of this success, and is hoping that the Bees will help his young striker develop as they push for as high a finish as possible.
"Brentford do things right and are very structured and are having a good season and it will benefit both, from an experience point of view it is as good as it gets,” he said.
“They look after young players and that is what we are looking for in this relationship."