As the inventor/developer — Igor Livshin, in his article "Balance of Market Power" — describes it :
He uses simple moving average for smoothing the values. This version uses improved Jurik filter instead. Bands are calculated using something that could be called "Jurik deviation" instead of using standard deviation and that way this becomes much faster in response. Except for smoothing and bands periods there are no other parameters, so it is a rather simple to use indicator (parameters wise) but, as usual, some experimenting is advised.

PDFma
PDFma — average using probability density function for average calculation.
Elliot oscillator
Elliot oscillator indicator.