Pretty easy to create: Crystal Reports line chart with banded background, indicating good, average and bad:
For this example I used the noordenwind database, the Dutch equivalent of the Northwind database. For the bands I used three formula fields:
I created a stacked bar chart based on the three formula fields.
The line chart presents the total sales volume per customer, limited to the country Germany.
You can download the file Graphbands.rpt through