Data for Websites ranking for pages over 100,000

This is probably in the wrong thread (sorry) thought there may be a blackhat site, as ie website a) ranks 353,000 or so in US. However any site ranked greater than 100,000 has no data (referring to Alexa). I found a niche which I know well, and good CPA, but need to know if this keyword actually brings in traffic

i read it 3 times, and yet , makes no sense to me.

I need to know a website that will return information on pageviews, traffic rank, daily pageviews, average time on site, etc, similar to alexa.com, which only shows data for the top 100,000 websites.

There's not he that's more accurate than the other, you'll need to
use a variety of tools to achieve your goal. You can use sites similar
to Alexa, like complete.com. The use tools like Googles keyword tool
to get keyword traffic estimates and SEMrush for additional data.

At the end of the day, none of the tools are perfect. I have one website
that gets ~5k uniques a day but ranks 300k in Alexa. Then I have other
sites that get only 50 visits a day that has a sub 100k Alexa rank.

Essentially there's no tool that will give you perfect details on the info
you are looking for, not even Alexa.