Calculates the numerical average in a moving window.

## Usage

MovingAvg(numbers, average, below)

**numbers** (required) The column of numbers to average.

**above** (required) The number of rows above the current to include.

**below** (optional) The number of rows below the current to include. Defaults to 0.

## Example

MovingAvg([Population 2010], 4, 0)

- For each value in [Population 2010] and the 4 values above it, calculate the average.