This is a variation of a digital filter using Hann windowing for filtering
with "speed up" factor set to 0, it is the same as original filter
any speed up factor > 0 makes it a bit more responsive
The difference between the default (the green/red line) and the same period but with "speed up" factor set to 5
*Use it as any digital filter / average
*When using speed up factor, the greater the speed up factor the "faster" the filter will be but you might lose the smoothness. Some balance in this has to be found by experimenting with the speed up factor
