As shown in the picture, the orange car wishes to move forward in the direction indicated by the black arrow. Does the driver of the orange car need to turn on the signal lights?

As shown in the picture, the orange car wishes to move forward in the direction indicated by the black arrow. Does the driver of the orange car need to turn on the signal lights?undefined
No, the orange car's path is basically a straight line
Turn on the right signal light before entering the roundabout, and turn on the left signal light before preparing to leave the roundabout.

In this type of "asymmetric" roundabout with three exit directions, if you are exiting at the second exit, you must signal right before entering the roundabout to indicate your intention.