Most chart views are hard to use unless you set the detail level on the original report to obscure most items. With all, you have enough accounts that the legend is only partially visible. Likewise, a linear chart frequently crowds a great many values into a small space.
It might be nice if there was a separate option on the chart page to change the detail level without altering the basic report configuration in the process (or remember the chart detail level separately from the report detail level).
How about pop-up tool tips that identify the account and amount under the cursor for bar or pie charts, and a logarithmic option help uncompress the charts.