Do you refer to metrics similar to the image below?

If so, this is obtained through 2 ways:
1st When placing the order, if you select one of the 3 options displayed the advanced monitoring will be installed and started when provision is completed.

Basic option selected above has at least: Cpu, Disk (if you refer to metrics related to this) and Memory, Monitoring Agent, etc.
2nd If you navigate to https://control.softlayer.com/devices/monitoring
and click on "Add Monitoring" on Advanced column, then you could order this but you will have to install manually the Nimsoft monitoring app. (http://knowledgelayer.softlayer.com/procedure/install-nimsoft-monitoring-robot)
Or if it´s nothing related to what´s above, please update the question with an image attachment of what do you require specifically on the Portal UI.