Possibility to get y position of a point/value at an index?

With a points array as usual, (how) is it possible to get the y position of a point (for example points[1]) on the linegraph?
I'm trying to draw a line on max and min similar to the Top and BottomAxisLabels examples, but they are (obviously?) just on the top and bottom of the graph "frame".

• And something additional; there seems to be some padding visible however as far as I understood, there should be no padding if Top/BottomAxisLabel is not set?

const points = [
    {
       value: 100,
       date: new Date('2020-01-01')
    },
    {
       value: 200,
       date: new Date('2020-01-01')
    },
    {
       value: 300,
       date: new Date('2020-01-01')
    },
    ...
 ]

Start by tracing how the line graph consumes the points array and positions its rendered line, then inspect how TopAxisLabel and BottomAxisLabel affect the graph frame. Define whether the component should expose each point's y position and how the apparent padding should behave when those labels are absent; no test or file is named in the issue.