When an offset is set to the yAxis (and some more customisation), I can't manage to set the range selector to align with right side of the rendering div instead of the plot area.
Highcharts documentation "The navigator is a small series below the main series, displaying a view of the entire data set". So navigator is just an additional series, that's why it's placed in the plot area. Unfortunately, there is no property to align it to the right side of rendering div.
These settings could do the trick if I had a fix width for my yAxis.
But this chart is a template for my website. So I can't know how much place will the labels take within the yAxis, depending on the values of the series displayed.
So, now the x value for input position is updating and depending on the values of the series.
In chart object you can find values of marginRight and spacing (used in demo below) .