Enhance your chart label

By default Tableau gives you some options to decide when to show the mark label: All, Min/Max, Selected, Highlighted or Line Ends (for the line chart).

What if you want to have different options, such as "Max & Line Start" or "Min & Line Ends"?

To achieve that you need to create a calculated field to be used in the mark label:

IF 
     <CONDIDITON>
THEN
     <VALUE TO SHOW>
END

The <CONDITION> will depends of what you wanna show:

//SHOW MAX VALUE
(WINDOW_MAX(SUM([Sales])) = SUM([Sales]))

//SHOW MIN VALUE
(WINDOW_MIN(SUM([Sales])) = SUM([Sales]))

//SHOW LINE STARTS
FIRST() = 0

//SHOW LINE ENDS
LAST() = 0

You can also mix those conditions.
For instance, you wanna show the Max & Line Starts as we said before:
IF 
     //SHOW MAX VALUE
     (WINDOW_MAX(SUM([Sales])) = SUM([Sales]))

     //SHOW LINE STARTS
     OR FIRST() = 0

THEN
     SUM([Sales])

END

You can also use that logic to color your chart. Just need to change the calculation to boolean.
For instance, you wanna color with orange the Min & Line Ends:

     //SHOW MAX VALUE
     (WINDOW_MIN(SUM([Sales])) = SUM([Sales]))

     //SHOW LINE ENDS
     OR LAST() = 0

You may use parameters to add interactivity (click on the image to be directed to Tableau Public):