Does P4 maintain the same altitude during the Active Track or will it go up and down?  
Would want it to hit a power line if I have it set to follow me down a curvey road.

A video in another post showed it did NOT adjust for altitude per se.  Though the obstacle avoidance should prevent it from crashing into the ground or a low object as your elevation rises, though personally I would not want to be dependent on this.  So the real answer is no, apparently, if the goal is to have it remain at a fixed relative altitude to your subject that you put it in when you started.

Thank you!

Hi, the tracking function will not change the altitude of the aircraft unless you move the throttle stick. Please watch out for the power line cause the aircraft can't detect that small size obstacle.