This indicator is a ported MQL5 indicator from http://www.mql5.com/ru/code/563 (in Russian).
Formulas:
Bulls - MA of HH, Bears - MA of LL, where
HH(i)=3*(High price(i))-High(x-Min,x)-High(x-Middle,x)-High(x-Max,x),
LL(i)=Low(x-Min,x)+Low(x-Middle,x)+Low(x-Max,x)-3*(Low price(i)).
Download:
For this indicator must be installed AVERAGES indicator (viewtopic.php?f=17&t=2430).