Could you pull a trick with a offset? calculate the most days negative a data element might be, then add that abs() value to all points...

>I have created a horizontal stacked bar chart using the VFP6
>ChartFX component. The y axis represents different candy a child
>has eaten. The x axis represents the number of days from joining
>my survey. Most children join my survey first, then eat candy. This
>is fine because the duration they are eating candy
>obviously extends from left to right starting from 0.
>The problem is that some children are already eating candy
>before they join my survey.
>
>eg. Fred was eating Snickers from 1/7/1999 to 10/7/1999
>but joined my survey on 3/7/1999. So the x axis must plot from
>-2 number of days from joining.
>
>How do I plot this? Graphics Server manages it fine but I have don't
>want to rely on 3rd parties.
>
>Any ideas fellow troubleshooters?