Hi, I am using Libre spreadsheet to monitor my health during this pandemic due to my disabilities. I was wondering if there is a way to set up automatic style fills within the spread sheet when it goes above and below certain numbers. It would make my life easier.
May I assume you enter the cell contents manually (or probably importing from a csv), but want to automatically get shown cell attributes (colors?) like alarm signals?
If so, ConditionalFormatting is what you need to apply.
You may start reading https://nextcloud.documentfoundation.org/s/CLxoM7m9pS64LYA#pdfviewer, and then come back with your more specific questions.
Hello,
i thinks you are looking for the Conditional Formating Feature:
And add one or more conditions with corresponding styles. (This one makes the Cell Red, when the values in the cells are greater or equals 25)
Hope that helps.
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Thank you for this, it is exactly what I needed as it takes the guess work out of scanning the ideal rates for me.
Happy to help.
Have an awesome day. 
Thanks again because of my health concerns I wanted to start monitoring my health more during this pandemic after I had COVID back in March April to try and take some of the weight from my GPs this helps give me something visual to see when I know I need external help