LH surge from dollar store?

Question

They said if there was only one line I wasn't ovulating in the next 24/48hrs but if there was within 3 min I should bm within the time span I'm asking if this is one cause I know on some this isn't Considered  one. I have water like cm I'm on cycle day 8. Day two of potential ovulation per glows terms.

Answer

The test line must be as dark or darker then the control line to be positive ovulation