Are lightweight charts viable for me?

[gryffus]

Hello, here is my goal:

I have a JavaFX GUI standalone application (GPLv3).
I want to display a simple candlestick to the user and let the user draw a fibonacci retracement.
I want to get the coordinates of the fib and use it in the application.

I was thinking about using JavaFX WebView for displaying the chart but I don't know if the lightweight charts let the user draw fib and most importantly if it's possible to get somehow values of the fibonacci in Java/JavaFX WebView (or actually any element that the user draws) .

Is this possible at all, with the lightweight charts preferably (GPLv3)? If not, is it possible with the advanced charts?

Thanks for any explanation.