A widget, app or website (in those order of preference) where I could enter a date range and it would tell me what
the lowest and
highest point of the coin was during those times.
So let's say I want to know what the lowest point and the highest point of Bitcoin was between May 6, 2021 - May 12, 2021. Or at least between the tool's predetermined times that I could select (1 day, 7 days, a month...etc).
I'm aware that almost every wallet or bitcoin tool does this...but actually, not really. See my very brief post
here which shows screenshots of how they don't.