What evaluation bars? I've never seen them in live games. I saw them on "Watch" and after match analysises. How can i turn them on?
Engine Evaluations (Not Cheating)

You can turn them on/off by your settings. They are those little black and white bars that show up when you're playing a live game.
Again, im not sure they are supposed to be there in live games. They should appear while watching other games and in analyses.. here my settings and testing.

Found 'em. They've been there sinice the beginning of ti-- since I joined up. They're fine, really. They're more about learning the game, than anything else.

Those are playtimes They show how much time did it take to make you move.
I might be wrong, but I'm quite sure those are engine evaluations, and they essentially work just how the accuracy score does in analysis.
I've been using engine evaluations since the day I began playing on chess.com.
At first I found those computer evaluation bars - to the right of every live game - to be very distracting. I'd even lost a few games because of it and I'd been planning to go onto my settings page and turning the thing off, but I never got around to it.
Times are changing, and that little fella is becoming my best friend.
As I forge on into the positional dimension of chess, those evaluation bars are slowly becoming a central tool in my games. I find I'm now advanced enough as a player to use my opponent's low scoring against him by scrutinizing his move (knowing full well his move is flawed because of its score). Even better, I can now trust my moves a little more if they've scored high, and find the certified positional strengths in that move. Conversely, if I scored low, I know I could've done better. I spend a few minutes trying to understand what is it I've missed and how I can make up for it.