To work properly, the compass of your AlpinerX must be calibrated once.
To do so, go to "my watch" page, "calibration", "compass calibration" and follow the procedure. You must turn the watch horizontally a full turn.
For a successful calibration, follow the good practice rules:
Tip: You can keep your watch on your wrist (horizontal - as if you were watching the time) and make one full turn on yourself. You can sit down on a rotating chair as it helps.