Miss. Code Ann. § 63-3-711: Miss. Code Ann. § 63-3-711

All signals given by hand and arm shall be given from the left side of the vehicle in the following manner and such signals shall indicate as follows:

1. Left turn--hand and arm extended horizontally.

2. Right turn--hand and arm extended upward or moved with a sweeping motion from the rear to the front.

3. Stop or decrease speed--hand and arm extended downward.