@makarkin.dv.1990 We are working on this feature, it’s still in progress, let me share Andrew’s post on the topic (JavaScript API updates) and an example (https://dev.datagrok.ai/js/samples/data-frame/events/events). To make it work, run the script and change color-coding for a numeric column to ‘Conditional’ from the property panel. It should work with other tags, too, I’m testing it for DG.TAGS.FORMULA, so that you can listen to formula changes and re-calculate the values according to the new expression.