Barry drew a blank in defeat at home to Manchester United on Monday night and Ball says he needs to be smarter on and off the ball.
He wrote for the Liverpool Echo: "Thierno Barry needs to start getting more shots on goal for Everton. Every time a look at him, he’s got two or three players around him.
"He needs to find space and be aware of his surroundings a bit more. The service to him is not always the best and there were some hopeful long balls on Monday, but when Manchester United's midfielders get possession, I’ve seen their strikers turn and sprint, showing some dynamic runs.
"I didn’t see one from Barry. He’s waiting for someone to find him, but you need to make their mind up for them by making a clever run – give Kiernan Dewsbury-Hall no choice but to play you in.
"I know he’s got a certain body language that looks laid back and lethargic, so when things don’t come off it perhaps looks worse than it probably is. He works hard at times, but I sometimes feel like they’re the wrong moments.
"It feels like he’s not looking at the ball a lot and when he does, it’s at the last minute and it all seems rather frantic or off the cuff. You can’t sprint for every ball, you’ve got to pick your moments."