# Log return

`log_return`

The natural log of the value over the previous value.

## Inputs

| Name | Type | Default | Range |
| --- | --- | --- | --- |
| source | source | close |  |

## Outputs

| Name | Kind |
| --- | --- |
| log_return | value |

Warm-up: 1 bars (1 at the defaults).

Repaints: No.

## Formula

ln(source[i] / source[i-1]). No value on the first bar, or when either value is missing or not above zero.