ChaikinVolatility

Is a market strength indicator.
Was developed by Marc Chaikin.
Is computed using the high and low prices.
Returns one time series, the relative change of a 10-period exponential moving average of the price range from 10 periods ago.
FinancialIndicator["ChaikinVolatility", n₁, n₂] uses period moving averages and compares with the value periods before.
The first value occurs after periods.