The Pentacle in Wicca is traced by witches during the rites, and it make a protective function; in some tradition, the witches and wizards reaching a second level of illumination bring the pentacle reversed, with the top down, but this not has bad meaning, only symbolizes a particular spiritual evolution. Essentially the two tips pointing upward is a reminder of the horns of the ram, the Baphomet and thus the Triple Goddess, i.e. Isis with the horns and sun disk, protective Mother Earth. But this symbol has been looted from Satanism, which obviously incapable of having an autonomous symbolic tradition is forced to plunder their symbol from Celtic tradition, from the Egyptian etc.. The meaning for them is simple: you put materialism above all things, spirituality and the evolution of are discarded. Satanists often reversed over the pentacle take a cross upside down in it. But it is precisely modern traditions that do not have much credit, although in the eyes of the public opinion dirty the positive image of the benevolent and powerful pentacle.