If you have done this, it means bubble size is set to the same value for all items; and hence, it means you are not using the variable "item" in your graph, hence; it means you have reduced the number of variables to three, as I have suggested in the first place.
Since you want to organize the graph this way, you need to select the data range for each series individually.
However, if updating the chart range manually everyday is a trouble that you want to eliminate, you can use "dynamic named ranges" .
See the following link:
http://office.microsoft.com/en-us/ex...001109801.aspx
P.S: To use the "dynamic named ranges" as described in the link, you should reorganize your data, such data each company data is on a different column.
You'll understand what I'm talking about when you read it.
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