> For the complete documentation index, see [llms.txt](https://docs.chartsql.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.chartsql.com/reference/directives/baselines.md).
# @baselines
Horizontal marks added to charts to mark major comparative values of a series like the average, median, min or max.
## Quick Reference
```sql
-- @baselines: Amount, UnitsSold
```
## Valid Values
`List`
Baselines must be a comma separated list of columns that map to the columns used within the @series or @secondary-series
{% hint style="info" %}
See also [@baseline-types](/reference/directives/baseline-types.md) for defining if the baseline is an average, median, min or max
{% endhint %}
## Full Example
```sql
-- @chart: column
-- @title: Baselines - Average Baseline
-- @subtitle: An example column chart showing sales by month
-- @formats: currency
-- @series: Sales
-- @baselines: Sales
SELECT
TRUNC(date_closed, 'MONTH') as Month,
sum(amount) as Sales
FROM sales
GROUP BY TRUNC(date_closed, 'MONTH')
ORDER BY TRUNC(date_closed, 'MONTH') ASC
```
## Use Cases
Baselines are good to show how a series value compares to to the average, min, max or median of the whole set. It helps give some context to the series data.
## Example Charts
