How to get value from a bar chart on oracle apex when clicking a specific bar?

I have a bar chart on an oracle-apex page, I want to get the value from a bar when I click on it. How can this be done?

You can create a new Modal Page with one Item to receive the value.
On you Barchart page go to Series -> Link -> select Redirect Page in This aplication-> and choose the target.

In the Link Builder set Page field as your Modal Page Number and Set Items filed name = item in your modal page to receive the value