Is a trend indicator.

Was developed by Donald Dorsey.

Is computed using the high and low prices.

Returns one time series, which is the 20-period linear regression indicator of 14-period relative volatility index.

FinancialIndicator["Inertia",n₁,n₂] uses an n₁-period linear regression and an n₂-period relative volatility index. The first value occurs after n₂ periods.