setting a starting point on a chart when x-axis scrollbar is enabled

[#1]

Hi

I have a document with charts where the x axis is the financial week. the graphs are restricted to show 10 values at a time (using a slider).

Is it possible (and how would I do it) to set the charts to display 10 steps back from the current week?

At present on opening they shown weeks 1 -10, where as today i'd like them to present weeks 6-15.

Many thanks in advance

Heather