How can a floating bar chart be produced that spans across the zero X (category) axis? I can simulate a single series spanning the x axis by stacking a negative and positive bar. However, the borders (necessary) around these two series points will always show a line on the x axis. As it is important that no line is visible on the x axis, I need to find a new method. I have tried to combine stock charts with bar charts, but the two types appear slightly out of alignment?