Hello everyone,
For my first post I would like to expose my blueprint target compass implementation
The first idea is to reference the North Pole as a target asset and create reference to his position during initialisation:
Then I process the angle between the target and the front direction:
Because the dot product with front direction don’t represente the left/right looking, I used the right direction to branch the radius and apply rotation condition to my Arrow compass:
Here’s the result:
[video]https://drive.google.com/file/d/0B0iUyhErgTtQcjNYYXBUcW9xSU0/view[/video]
If you have questions or commentaries, please feel free to provide me your feedback to accurate it 
Thanks!