How to make a smart text tag in a line chart in Calc?

I would like to make max and min tags with data values on line charts to highlight the those chart points.
I am not sure what to call them but I am desiring a bubble or box or tag that will automatically move to a point near a maximum or minimum data point and display the exact data value in the bubble or tag. An alternative would be that the cursor would display data value when hovered over a chart line.

@Otetiana, If you select Edit in the context menu of a graph, hovering with the cursor will show serie and values of each point.

Also can insert data labels for all the data points (or insert a single data label, that is not the idea here).

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