Dynamic Momentum Oscillator (Dynamo)

Hi,
In July 1996 Futures magazine, E. Marshall Wall introduces the
Dynamic Momentum Oscillator (Dynamo). Please refer to this article
for interpretation.
The Dynamo oscillator is a normalizing function which adjusts the
values of a standard oscillator for trendiness by taking the difference
between the value of the oscillator and a moving average of the oscillator
and then subtracting that value from the oscillator midpoint.