Ok this is what i found if there using aimbot watch there cross from ineyes view u will notice it snapp on opponent and follow them about ,they dont always kill though depends on there ping but u can easy see that.
Tracer bot is a little harder what u have to do is stay ineyes view and watch if they swing there cross past opponents rathere than try and actually aim they will swinng letf right and so on each time the gun will fire maybe it will miss but the shot will be close everytime ,U know to close ,anothere thing u will notice that they make a lot of 1 shot 1 kills and i mean lots.But the main giveaway with Tracer is it has a habbit of firing 1 time after the persons dead if he dident manage to kill him with 1 shot.
To sum it up aimbot snaps on target and follows
Tracer sweeps side to side and makes loads of 1 shot kills and also fires @ nothing just after they kill someone who they maybe missed first time.
hope this helps u and to anyone else please put your input in how u spot cheaters.
1 thing they may turn the bots on and off so be patient normaly if they have flag or opponent has flag they switch it on . in DM on alltime i guess