There is now link between two tables and more over we are generating Indicatior exp in chart. Why can't you hard code it.
If that is in the case you can use below code in corresponding level expression in chart
=if(column(4)>=0 AND column(4)<0.4,'Unacceptable',
if(column(4)>=0.4 AND column(4)<0.6,'Bad',
if(column(4)>=0.6 AND column(4)<0.8,'Good',
if(column(4)>=0.8 AND column(4)<1,'Excelent'))))
Be careful of expressions that use fields from two (or more) unconnected tables. If the dataset is small, they will perform OK, but if it is larger, you will run into "out of memory" errors when QV tries to create a cross join to perform the calculations.
You are better off using intervalmatch when reloading. From your second post, that would seem to be the correct way. Search the forum for intervalmatch, there are many postings on the topic, and check out intervalmatch in the manual.
Hope that helps