This indicator has been described in the Stock&Commodities (October 2015).
Formula:
MFO = Sum(MFV)/Sum(Volume) with [Period] number of periods, where
MFV = Multiplier*Volume,
Multiplier[i] = [(High[i]-Low[i-1])-(High[i-1]-Low[i])]/[(High[i]-Low[i-1])+(High[i-1]-Low[i])].
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