True, but I think Dave has still pointed you in the right
direction.

To get a bar  chart, you need at least hi/lo/close (if you
want to use an Excel chart) -- so just set close to the HI
or LO.

And there is certainly a horizontal axis to your chart.. it
does not measure time, it measures bars. Your subroutine
will need to do the math to figure out when a new bar is
called for. Nonetheless, it would still be bar 1, bar 2,
etc in the data  series.