When I add a CandlestickRenderer or a HighLowRenderer
to a chart the boundaries for the range axis are not
correctly determined. Part of the stick may be clipped.
I think that only the 'close' values are considered for
the range of the axis.
The solution is to look at the 'low' values to find the
lower bound and to look at the 'high' values to find
the upper bound.