Calculation
The calculating method is deviation when compared to usual momentum calculation. Momentum is calculated as a sum of absolute differences of current price to the price 1 period ago and then compared to the ratio of current price to the price several (N) periods ago.
ABS MOMENTUM = SUM(ABS(CLOSE(i)-CLOSE(i-1))
MOMENTUM = CLOSE(i)>CLOSE(i-N) ? ABS MOMENTUM : - ABS MOMENTUM
where:
This version :

PS: the "big picture" comparison of this momentum and the regular momentum and the comparison of the decision points
Volatility adjusted WPR
Volatility adjusted WPR (Williams Percent Range)
Volatility adjusted RSI
Volatility adjusted RSI