Combining East and West

https://i.thehoroscope.co/chinese-western-zodiac-combinations/

https://www.astrologyanswers.com/article/chinese-zodiac-western-equivalent-signs/

Harmonics

 https://www.astro.com/astrology/aa_article220307_e.htm

Aspects geometrically

https://en.wikipedia.org/wiki/Astrological_aspect

Noviles

 https://aliceportman.com/noviles/

Advanced Astrology Concepts

 https://advanced-astrology.com/mercury-in-aquarius/