OPK test, is this + or -???

Victoria • My partner and I have been TTC for many years with no luck. We`ve had 4 Miscarriages and 1 Ectopic pregnancy. It`s been a stuggle to get pregnant and stay pregnant.
I literally just took this OPK about 10 minutes ago. Is this a positive LH surge or should it be even darker than the first line? Glow says my expected ovulation date is July 29th and Feryility Friend says 30th.