Surface water movement takes place in the form of currents. Currents move ocean water horizontally at the ocean's surface. Surface currents are driven mainly by the wind. Other forces such as the Coriolis effect and the location of landmasses do affect surface current patterns.
If the line is darker I would assume a BFP. Normally as Ovidrel leaves your system the line will get lighter. I was told by my doc that it could take at least 10 days to leave your system...which is why we're not suppose to test before day 14 (like any of us can wait that long). Congrats and best wishes to you!
The 12 to 36 hours between the beginning of the LH surge and the moment when your egg is released is the most fertile part of your cycle and the most likely time for conception. Saliva-based OPKs test for rising oestrogen levels as you near ovulation, not the hormone that triggers it.