Chaikin Volatility — Indicator by HPotter

Chaikin's Volatility indicator compares the spread between a security's
high and low prices. It quantifies volatility as a widening of the range
between the high and the low price.
You can use in the xPrice1 and xPrice2 any series: Open, High, Low, Close, HL2,
HLC3, OHLC4 and ect...

Open-source script

In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in a publication is governed by House Rules. You can favorite it to use it on a chart.

Disclaimer

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////////////////////////////////////////////////////////////
//  Copyright by HPotter v1.0 13/08/2014
// Chaikin's Volatility indicator compares the spread between a security's
// high and low prices. It quantifies volatility as a widening of the range
// between the high and the low price.
// You can use in the xPrice1 and xPrice2 any series: Open, High, Low, Close, HL2, 
// HLC3, OHLC4 and ect...
///////////////////////////////////////////////////////////
study(title="Chaikin Volatility")
Length = input(10, minval=1)
ROCLength = input(12, minval=1)
hline(0, color=purple, linestyle=line)
xPrice1 = high
xPrice2 = low
xPrice = xPrice1 - xPrice2
xROC_EMA = roc(ema(xPrice, Length), ROCLength)
plot(xROC_EMA, color=blue, title="Chaikin Volatility")