The volatility cycle indicator measure differences between current standard deviation of the price and its highest and lowest within the last “InpBandsPeriod” bars. It results of a bounded oscillator that can be read as:

• oscillator is low, expect a volatility explosion in the next periods or the end of the current trend
• oscillator is high, a trend is currently forming

The curve can be smooth much more to avoid false signals but with more lag.

This technical indicator should  be used with other ones to confirm its information.

//PRC_Volatility Cycle | indicator
//02.12.2016
//Nicolas @ www.prorealcode.com
//Sharing ProRealTime knowledge
//converted and adapted from Metatrader4 version

InpBandsPeriod=18      // Period
Smooth=2               // Smoothness

StdDev = std[InpBandsPeriod](close)
highindex = highest[InpBandsPeriod](StdDev)[1]
lowindex = lowest[InpBandsPeriod](StdDev)[1]

if barindex>InpBandsPeriod then
VolDer = (StdDev-highindex)/(highindex-lowindex)
VolSmooth = average[Smooth](VolDer)

if VolSmooth>0 then
 VolSmooth = 0
elsif VolSmooth<-1.0 then
 VolSmooth = -1.0
endif

endif

RETURN VolSmooth as "Volatility Cycle"