i found this is it possible to change label?
Changing Chart Axis Titles in CRM 2011
OK, one of my pet hates is seeing beautiful charts (and dashboards) which have “dodgy” axis labels (everyone’s familiar with the CRM standard axis labels like “Count All (Name)” right? And wouldn’t it be easier for our CRM users to understand if the axis label was something like “Number of Contacts”? Well here’s the solution:
Navigate your way to the chart you want to change - Settings - Customizations - Customize the System - [Entity] - Charts
Tick beside the Name of the Chart you want to change
Click the More Actions button - then click Export Chart
Save the chart xml file on your desktop
Open the chart xml file in an editor (Notepad++ is a good option)
Locate the appropriate X or Y axis line (they start with <AxisX… or <AxisY…)
Right up the end of the line, just before the > symbol - enter Title=“Number of Contacts” (or whatever you want the axis label text to be
Save your changes to the chart xml file
Back in CRM click the More Actions button - then click Import Chart
Browse to the chart xml file on your desktop - then click the Open button then the OK button
You should get a warning message saying that “A Duplicate Chart is found” - thats ok because we want to overwrite the chart with our changes - Click the Replace button
You should get a “The chart was successfully imported” message - Click the Close button
Publish your changes (Click the Publish All Customizations button
Check your chart is now showing the new custom axis title