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How to get a certain tag name in specific condition?

Question asked by 99anger on Nov 11, 2016
Latest reply on Nov 23, 2016 by Kenji Hashimoto
Here is a work be far beyond my capacity.
Is it possible search a certain tag name in specific condition?

 

I have three value symbols meanig load
And I'm trying to get tagname which is most increased

 

I found increase rate of value using PE :
   PreVal('tagname',"*") - PreVal('tagname', PreEvent('tagname','*')).

 

But I don't know how to compare these and sort according to value.
Finally, hope to display most increasing tagname in textbox
Thanks.

 

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