# Bill Williams. Awesome Oscillator (AC) Strategy

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This indicator plots the oscillator as a histogram where blue denotes
periods suited for buying and red . for selling. If the current value
of AO ( Awesome Oscillator ) is above previous, the period is considered
suited for buying and the period is marked blue. If the AO value is not
above previous, the period is considered suited for selling and the
indicator marks it as red.
```////////////////////////////////////////////////////////////
//  Copyright by HPotter v1.0 15/04/2014
//    This indicator plots the oscillator as a histogram where blue denotes
//    periods suited for buying and red . for selling. If the current value
//    of AO (Awesome Oscillator) is above previous, the period is considered
//    suited for buying and the period is marked blue. If the AO value is not
//    above previous, the period is considered suited for selling and the
//    indicator marks it as red.
////////////////////////////////////////////////////////////
study("Bill Williams. Awesome Oscillator (AC)")
nLengthSlow = input(34, minval=1, title="Length Slow")
nLengthFast = input(5, minval=1, title="Length Fast")
xSMA1_hl2 = sma(hl2, nLengthFast)
xSMA2_hl2 = sma(hl2, nLengthSlow)
xSMA1_SMA2 = xSMA1_hl2 - xSMA2_hl2
xSMA_hl2 = sma(xSMA1_SMA2, nLengthFast)
nRes =  xSMA1_SMA2 - xSMA_hl2
cClr = nRes > nRes[1] ? blue : red
pos =	iff(nRes > nRes[1], 1,
iff(nRes < nRes[1], -1, nz(pos[1], 0)))
barcolor(pos == -1 ? red: pos == 1 ? green : blue )
plot(nRes, style=histogram, linewidth=1, color=cClr)
```