The indicator looks like traditional stochastic.
Formulas:
Line[i]=K*(St-Line[i-1])+Line[i-1],
Signal[i]=K2*(St2-Signal[i-1])+Signal[i-1], where
K=2/(1+[Slowing]),
K2=2/(1+[SignalSlowing]),
St=100*(close[i]-LowPrice)/(HighPrice-LowPrice),
LowPrice and HighPrice is a minimum and maximum prices at range from i-Period to i,
S2=100*(Line[i]-LowPrice2)/(HighPrice2-LowPrice2),
LowPrice2 and HighPrice2 is a minimum and maximum of Line at range from i-Period to i.
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