The volume weighted mean absolute deviation is a dispersion measure of a set of data points. The volume weighted mean absolute deviation is the mean absolute deviation applied to weighted data set.

### Indicator Description

Calculation: The mean absolute deviation of the selected data set is the volume weighted arithmetic mean of the absolute deviations from the volume weighted arithmetic mean of the data set.

The indicator values are calculated from the price data over the selected lookback period.

- We start with the calculation of the volume weighted mean of the selected input data.
- Next we find out how much the data points deviate from the volume weighted mean and calculate the absolute differences dropping any negative signs.
- We take the absolute values of the differences and calculate the volume weighted arithmetic mean of the absolute values.

#### Other Library indicators

Other indicators from the statistical analysis category include the Interquartile Range, Mean Absolute Deviation (Around the Median), Median Absolute Deviation (Around the Median), Moving Mean TPO, Moving MedianTPO, Moving Mode TPO, Moving Mean VWTPO, Moving MedianVWTPO, Moving Mode VWTPO, Moving Median, Standard Deviation, Volume Weighted Standard Deviation and the Modified Z Score. You may furthermore review the Raff Channel, Daily Regression Channel and Indicator Spotlight newsletter post on the Linear Regression Channel.

The indicator is available for NinjaTrader 8.