How to make a static bar move dynamically?

[KalebeRS]

Hello,

I have this bar graph with a static bar to show a deadline. Needed to change the little bar position dynamically when the dates changes.

Is that possible?

[ITWhisperer]

The closest you might get is to have a line graph overlay at that point, however, the data point for that day would align with the middle of the column for that day, not to the left of the columns. Note this works with _time not a string value in the x-axis

[richgalloway]

Please share the code you use to create the bar.