What is the maximum allowable degree of ascending constellation?

The maximum compatibility tolerance is 4 degrees.

1, the traditional astrological tolerance is based on the different starlight range of each star, so the tolerance is based on the stars that make up the phase.

2. Modern astrology pays more attention to psychological feelings, and tolerance depends on different phases. For example, the combined phase is sometimes larger than the Liuhe phase. Moreover, astrologers set different tolerances according to their own experiences and feelings.