TIP:
You can use modified SWQL query and use only one Y-axis.
SELECT ID, CAPTION, DATETIME, UTIL
FROM
(
SELECT NodeID AS ID, N.Node.Caption AS CAPTION, DateTime, AvgLoad AS UTIL
FROM Orion.CPULoad N
WHERE NodeID = 737 -- set yours nodeId
UNION ALL
(
SELECT InterfaceID AS ID, I.Interface.Caption AS CAPTION, DateTime, PercentUtil AS UTIL
FROM Orion.NPM.InterfaceTraffic I
WHERE InterfaceID = 16 -- set yours interfaceId
))
