In a roundabout, the one who comes from the left always has priority, ie the one who is already in the roundabout. Roundabouts do not need to be signaled, but it is not forbidden to help other road users. However, when exiting the roundabout, it is always mandatory to indicate to the right by indexing. Many people incorrectly index to the right when entering a roundabout, even though this is completely incorrect, it is misleading, as other road users may think we are driving out of the roundabout immediately. If you want to signal very much when folding, do it by indexing to the left, which you change to indexing to the right when folding.