Gann's history will repeat itself. What history will repeat itself?

The core content of Gann's theory is astrology, and most of its cycles come from astrology. Let me give you an example I used: the dollar index made a head in the summer of 2065438+July 2005, and the price was around 97; In the summer of July 2065438+2006, 97 yuan made another head price, which is a repeat of history. Needless to say, 97, summer is one of 24 solar terms, and 24 solar terms refers to the longitude of the sun.