OPK Positive or Negative?

Hello Ladies!
I am new to using Ovulation Predictor Kits (OPKs) and I am not sure if this is positive or negative. I've been using them the past week and have had a faint line all week and then today it got much darker. I would appreciate all of your honest opinions! :) 
Thanks in advance! 
Barbara 

Vote below to see results!