This sign from the ground-to-air emergency code means I/we proceed
in this direction. According to some sources
(above in this group) is a synonym.
is also a British hobo sign that tells the passing tramp here they sometimes give you food.
In astrology the sign represents one of the so-called weak aspects: the inconjunct or quincunx, meaning that the planets involved are positioned 150 degrees from each other in the zodiac.