# Derivative

The Derivative plot shows the rate of change at each given point in the selected input series.

* The default is to calculate the rate of change per second. This can be changed to several other options, which affect only the y-axis units and not the shape of the curve.
* Derivatives are useful for identifying when the slope of a series is flat (that is, not changing.) To find periods where a series is not changing, you can do a [Time Series Search](../card-time-series-search/index.md) for periods when the derivative of the series is close to zero.

## Input type

Time series

## Output type

Time series

### Example

![Derivative example](../../../assets/4f081a8c92c6549756089d2d9bc23c539449a1f18e585db435e8819a228bed04.webp)

## Usage information

| Functionality | Availability |
| --- | --- |
| [Standard Quiver card](../core-concepts/index.md#cards) | Supported |
| [Transform table transform](../cards-transform-table/index.md) | Supported |