Auto Size Shape?

[Endlessknight]

Greetings All,

I was wondering if there was a way to auto size a shape that's overlayed on a graph. I have a series of graphs like the type shown below.

The data that drives the charts changes often and thus the middle bar resizes itself but the arrow has to be manually changed each time.

Is there any way to get the arrow to auto resize to the top of the bar whenever the bar changes?

Thanks in advance for any input/help.

 

[Endlessknight]

I'm sorry but I didn't explain that very well. What I'm looking for is a way to set the height of the arrow graphic to always but equal to the height of the middle bar, such that when the bar changes size the arrow would also.

Thanks.