Flash/PHP chart tool with minmax line support?

Hi

I'm in need at work of a PHP drivable flash chart generator which can
ploy min/max data as two lines with shaded infill between the lines.

The best charting libs I've come across thus far are:

Fusion Charts http://www.fusioncharts.com/
and
Open Flash Chart http://teethgrinder.co.uk/open-flash-chart/

but neither of these appear to be able to handle min/max data other than by
an errorbar plot. My data is too dense (too many discrete data points) to
look good with an errorbar plot).

My actual problem is plotting time-compressed summary data (eg X/Time data
series that have been compressed to say 1/10 of the original number of
points, thus it is essential that information about any peaks or troughts
is not lost).

Many thanks in advance

Tim