Elder impulse system with double exponential moving average dema

This version of impulse uses the double exponential moving average instead of the typical ema both to calculate macd and the moving slow and fast moving average that are plotted.
The impulse system :
The Impulse System combines two simple but powerful indicators.
One measures market inertia, the other its momentum. When both
point in the same direction, they identify an impulse worth following.
We get an entry signal when both indicators get in gear.
The Impulse System uses an exponential moving average to find
uptrends and downtrends. When the EMA rises, it shows that inertia
favors the bulls. When EMA falls, inertia works for the bears. The sec-
ond component is MACD-Histogram, an oscillator whose slope reflects
changes of power among bulls or bears. When MACD-Histogram rises,
it shows that bulls are becoming stronger. When it falls, it shows that
bears are growing stronger.
The Impulse System flags those bars where both the inertia and the
momentum point in the same direction. When both the EMA and
MACD-Histogram rise, they show that bulls are roaring and the uptrend
is accelerating.