Arrow in the compass: what's this ?

Goodmorning everyone,

I received my first Instinct yesterday, I understood almost everything but one thing. I apologize for the banality of the question:

in ABC there are in the order Altimeter - expressed as the trend of the altitude - in the last 4 hours , Barometer, Compass, and a second compass with display of the altitude and an arrow which in my current case is oriented to the right.

What does this arrow indicate? What does his verse indicate?

Sorry . . .