Custom Tags is it possible to customize them?

Hello. Is there a way, perhaps with a custom tags, to get the average on solar radiation?

Don’t think so, with current WD tags: a quick check of tagslist.txt doesn’t mention any solar averages.

But why would you want average solar? And over what period? An hour? A day? A month? A year?

Yes, I would like a day-month-year average and also other values such as ET and UV. Surely they are exaggerated and technically perhaps they have no value. I found these functions only on html pages like Meteotemplate for example. WD of the software I know is the most complete, as a database or historical use sins a bit 'just on solar values. My personal and questionable opinion.