To use the add ADD Function
ADD(TagTag1,TagTag2,TagTag3)
Tag1 + Tag2 + Tag3
ADD(Demo-influxdb/DEMO_01TI031.PV,Demo-influxdb/DEMO_01TI032.PV,Demo-influxdb/DEMO_01TI021.PV)
-The Trends to the right of the tags display the live data of the tag
Examples
Creating totals to be used calculate averages using the DIV operation
DIV(ADD(Tag,Tag,Tag),Tag)If your tag is invalad it will display