Dynamic Line Graph, Multiple Series

[SvelteRose]

Hello,

I am trying to created a line graph with 12-13 series that you can interact with. Like this graph below:

http://img59.imageshack.us/img59/5582/excelhelp.jpg

I would like to be able to created a line graph where you can zoom in 5 yrs, 10 yrs, etc. Everything I choose from a drop down menu, I would like it to show the years interval. There are 2 viewing types:

Actual (1981-1985)
Actual (1981-1990)
Comparable (-2 to 3)
Comparable (-2 to 8)

The comparable shows the year starting at the first year when a company made their initial public offering (IPO). Negative numbers indicate years prior to IPO.

I thought a macro would help but apparently, dynamic charts are also feasible? Unfortunately, the dynamic chart option did not seem to work so I am at a loss.

First off, these are my named formulas:

StartYr: =MID(SummaryDB!$B$5,FIND("(",SummaryDB!$B$5)+1,FIND("-",SummaryDB!$B$5)-FIND("(",SummaryDB!$B$5)-1)

EndYr: =MID(SummaryDB!$B$5,FIND("-",SummaryDB!$B$5)+1,FIND(")",SummaryDB!$B$5)-FIND("-",SummaryDB!$B$5)-1)

B5 is where the drop down menu shows the values. (IE: Actual (1981-1985), Comparable (-2 to 3))

Now I am trying to point out what array the chart should look for depending on the interval chosen:

XValues: =SummaryDB!$C$8:INDEX(SummaryDB!$8:$8,MATCH(EndYr,SummaryDB!$8:$8,0))

Wherein Row 8 is part of a chart data that the line graph is reading off of. Row 8 specifies the years, Row 9 and on is the data per company. Row 8 is driven by a formula. C8 says 1981 while D8 has a formula C8+1 and shows the value 1982 in the cell. That's when you choose the "Actual" intervals. If you choose any of the "Comparable" intervals, it will read -2, -1, 1, 2, 3...etc. Again, the cells are formula-drive except for C8.

Unfortunately, every time I go to the chart, right click, and try to edit the horizontal axis, my "=XValues" keeps giving me an error message. I cannot fathom what the issue is with the darn formula and it's driving me crazy. Is there an alternative?

I have added the worksheet: http://www.mediafire.com/?mmaw2mtzvg3