Help on a Combination chart (area portion)

[adpruett]

I am creating a chart that uses target ranges to, in turn, create different areas. However, what I want it to do is always fill up the last target range's color to the top of the graph, but it is still leaving a jagged look. I've tried using the property of stacked 100%, but it does not seem to serve my purpose. 

I posted an example of what I am trying to mimic.

Thanks! 

[DustPanMan]

Can you screenshot what you are getting now?