Looking into a question from user Alex100, i realized many people do want some kind of values displayed on chart when they hover the mouse over different bars.
As pinescript does not have any feature like pop up box, the only way is to plot a line and than see indicator values at top left. So when mouse is moved around the value displayed changes. As we just need the value, we do not want to clutter the chart with another line.
Using display.none will hide the value from indicator value also
Using color.white will also color the indicator value to white, making it invisible
So the solution is very simple, and requires a bit of creativity. We create an invisible line, in any color we like :)
This indicator is a tutorial on how to display indicator values without the line showing up and also this can be implemented as displaying data for each bar on mouse hover.