Ovulation

I think he might be a bit darker. But your ovulation is definitely going to be this week. Probably between Wednesday and Friday. A bit dependent on whether your test is still thicker tomorrow or if it's fading.

It varies from woman to woman and from test to test. With one, the line from Action is dark, and with another, it's light. You could try a different brand and see how it reacts to your urine With me, the Action ones weren't very dark either, but they did go up and down. That way, I also knew when my ovulation had been.

Once they're done, you're at ovulation. You've had an LH peak followed by ovulation. This measures the peak.

Are you sure you've already ovulated? Maybe the earlier tests were just faint.
Another possibility is that you're pregnant. Ovulation tests can also react to the pregnancy hormone. I once held a positive ovulation test myself. (I did it just because I only had one pregnancy test at home and didn't want to use it since I didn't want to be disappointed if it was negative. So I did an ovulation test just for fun, which also turned positive. Then I took a pregnancy test, which was also positive..) Maybe you should try a pregnancy test too? When is your period due?