Sum the values in a moving window.

## Usage

MovingSum(number field, above, below)

**number field** (required) The column of numbers to be summed.

**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

MovingSum([Population 2010], 10)

- Calculate the total for each row and the 10 above it.