“Mercury retrograde happens when the planet Mercury passes between the Earth and the Sun. Because Mercury’s orbit is about 84 days, this happens three times a year. While the retrogrades typically last about 22 days, there is a margin on either side of two to three weeks where the influences can be felt. Mercury is not made of mercury. It has a huge core with a very high density, leading astronomers to believe that it’s made mostly of iron. In fact Mercury is believed to have the highest iron content of any planet in the Solar System.
This is all another way of saying Mercury retrograde means a huge magnet passes between the Earth and the Sun, making its closest pass to our planet at the same time. This may explain why devices act weird, but I think that it also helps explain why the mind gets wonky, such as the tendency to lose things, or to perceive problems as being worse than they are — the nervous system runs on electricity. The mind is a device that is, at least on the physical plane, rooted in electricity and magnetism.”