Momentum Indicator avg short return minus avg long return

Average daily return over the period 2-12 months ago minus the average daily return over the period 1-5 years ago
=> a higher return 2-12 months ago indicates a higher return in coming months according to research, because of the momentum risk factor premium
=> a higher return 1-5 years ago indicates a lower return in coming months according to research, because of the momentum risk factor premium