Hello, mind helping? ☺️

Erika • ❤•️14/6/2013•21•❤️
I was just wondering because I'm new to this app, you know how there's those circles that are blue and red and try tell you your risk of pregnancy? On mine on a certain day it says something like 11% high risk what's 11 high risk , I don't get it.. Is 11% higher then 50% or... Soz I'm just confused.. What does it mean?!