Some questions about the NetXMS agent - performance tab

When using agent 0.2.19 the CPU utilization was graded from 0..100. Now it is from 0..1? What's the reason?
It would be clean to add the units of the Y axis on CPU utilization, CPU Average load and Disk queue... Those metrics can be measured differently and display many things differently...

Then, are there other metrics a NetXMS Agent can collect (not via SNMP)?
Is there a way to add them on this tab?

Suggestion: have such a performance tab for SNMP agent as well + possibility for user to add his metrics (standard or home-made) so important metrics graphics are quickly available...

Rgds,
Jdamien