The striker has been a revelation since joining the Saddlers from Boreham Wood for £35,000 in the summer.
But the 23-year-old's career has not always been straight forward.
After 10-years at Arsenal, Ferrier had spells at Watford and Nottingham Forest before dropping into non-league.
And that's why he is so grateful to manager Dean Keates for giving him a shot in League One.
"I made a few mistakes when I was younger so that’s why I’m so grateful to the gaffer for giving me this opportunity," Ferrier said.
"Every day, whether it’s out to train or playing games, I want to repay him because he has shown so much faith me in.
"And he has given me the licence to go out and be the person I want to be and the player I want to be.
"I'm quite a fiery character and at times that can misunderstood. A lot of times people look at that in the wrong way.
"But I’m getting older, I’m becoming more mature and I want to be a positive influence instead of a negative one.
"Those I’m the things I am working on and the gaffer helps me a lot with that.
"I’m eternally grateful to him. I just want to work hard for him and do the best I can for myself and everyone connected with the club."
Ferrier admits it was hard being released by Arsenal as a youngster.
But he feels the experience helped him realise what he had to do to make it as a professional.
"It was hard – I had been at Arsenal for 10-years and it was all I knew," he continued.
"But leaving there helped me to open my eyes and realise, this can all go so quick.
"One of the best things I did was going non-league because a lot of players get wrapped up in a bubble of playing under-23s football.
"But it’s not realistic. In non-league, you’ll get fouled 10 times and the ref will only give you one or two.
"It toughened me up. Everyone’s pathway is different but mine has been good for me."