What type of site do you have? Show Us URL.
Just in case if you want to test your site, to see the ratio you site will have, you can try to buy some high quality ad traffic for test purposes. If you want to do so, I would recomend traffic from
Ero Advertising. They have really good traffic in all niches, with really good GEOIP filtration and anti-cheat system built-in.
But I recomend you to work on buildind SE traffic, or traffic from other sources.