Mississippi Code Title 63. Motor Vehicles and Traffic Regulations § 63-3-1311

(1) A bicyclist shall indicate a right turn by extending the left arm upward, by raising the left arm to the square, or by extending the right arm horizontally to the right.

(2) A bicyclist shall indicate a left turn by extending the left arm horizontally.

(3) A bicyclist shall indicate stopping or decreasing speed by extending the left arm or the right arm downward.

(4) A bicyclist is not required to give the signals continuously, if the hand or arm is needed to control the bicycle.