How to notification which item have discount

Hi everyone,
I have some item want buy, I want to know, how to I know when item have discount (I had add in cart)
because I had miss discount in August, I want wait blackfriday, but may have some discount I don’t know
Thank you

Discounts are applied by, or with the permission of the author - there’s no way of getting automatic updates for the status or price of individual items.

Also, while there will most likely be Black Friday offers, do not assume that this will apply to every item. Individual authors may well decide that they do not want to discount their items.