Finite Volume Elements (FVE)

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//  Copyright by HPotter v1.0 30/05/2014
// The FVE is a pure volume indicator. Unlike most of the other indicators 
// (except OBV), price change doesn?t come into the equation for the FVE (price 
// is not multiplied by volume), but is only used to determine whether money is 
// flowing in or out of the stock. This is contrary to the current trend in the 
// design of modern money flow indicators. The author decided against a price-volume 
// indicator for the following reasons:
// - A pure volume indicator has more power to contradict.
// - The number of buyers or sellers (which is assessed by volume) will be the same, 
//     regardless of the price fluctuation.
// - Price-volume indicators tend to spike excessively at breakouts or breakdowns.
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study(title="Finite Volume Elements (FVE)", shorttitle="FVE")
Period = input(22, minval=1)
Factor = input(0.3, minval=1)
xhl2 = hl2
xhlc3 = hlc3
xClose = close
xVolume = volume
xSMAV = sma(xVolume, Period)
nMF = xClose - xhl2 + xhlc3 - xhlc3[1]
nVlm = iff(nMF > Factor * xClose / 100,  xVolume, 
        iff(nMF < -Factor * xClose / 100, -xVolume, 0))
nRes = nz(nRes[1],0) + ((nVlm / xSMAV) / Period) * 100
plot(nRes, color=red, title="FVE")