Algoritme in Pine (tradingview)

I would like to have a algoritme in Pine language for tradingview, where you can see when the stock is in green, yellow og redzone for buying. I need assistance for understand it clearly and develop it myself.

When applying for the job please briefly give an introduction of the uploaded file, so I know that you have fully understood the task.
Thanks in advance?
Please like at the upload file.
Contact med for further questions.