The ancient movement of the Microcosmic Star is a symbolic gesture to invoke protection and energy from the universal source of life. It is used as part of spiritual practices and rituals.
The five-pointed star, the Pentagram, is a symbol of the perfect human being and the Christ. As is says in the Bible:
"I am the root and the offspring of David, and the bright and morning star." — Rev 22:16
Christ, being a universal intelligence, is represented in all religions, such as by Vishnu, Avalokitesvara, Quetzalcoatl, etc.
About the Pentagram, Samael Aun Weor said in The Pistis Sophia Unveiled: "The sign of the Pentagram is also called the sign of the Microcosm. It represents what the Kabbalist Rabbis of the book Zohar call the Microprosopos. When the superior point of the Pentagram is aiming upwards towards the sky, it represents the Savior of the world [Christ]. When the two inferior points of the Pentagram are aiming upwards towards the sky, it represents the male goat of the Witches' Sabbath. A human figure with the head aiming downwards obviously represents a demon, that is to say, an intellectual subversion, disorder, or madness."
To learn more, study this lecture: The Microcosmic Star
For questions, ask an instructor.