Does this look like a positive OPK Wondfo test??

I can't tell if March 8th was a positive day or not. The rest of the week had a very faint test line (I don't have a more recent picture). 
This is my first time using Wondfo so I'm not sure what exactly I'm looking for! 
What do y'all think? 

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors