> For the complete documentation index, see [llms.txt](https://help.edgetracker.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.edgetracker.com/advanced-scanner/creating-filters-and-columns-using-formulas/examples/filter-pre-market-7-am-high-greater-than-20.md).
# Filter: Pre-Market 7 AM High > 20%
This example creates a filter that returns securities whose highest pre-market price between 7:00 AM and 9:29 AM was at least 20% above the previous day's close.
To add this filter, open an existing scan and follow the steps below. If you don't have a scan yet, see this [article](/advanced-scanner/readme.md) to create one first.
Add a new filter by clicking on the new filter icon as shown below.
Use the following formula and click "Add".
{% code overflow="wrap" %}
```
[INTRADAY_MAX(price_high_adj, 0, 7:00, 9:29, 30)] / [DAILY_PRICE_CLOSE_ADJ(-1)] > 1.2
```
{% endcode %}