In Nadi Astrology, Bhrigu Bindu (BB) is believed to be the midpoint between Rahu and Moon, starting from Rahu and not from Moon. It is calculated in birthchart but its fruit is seen in transit. When some planet in current transit comes to or aspects BB, that planet gives good or bad fruits according to its natural (permanent) as well as chart-specific fruits. In chart-specific fruits, transit chart has a vital role. Conjunction with BB has full effect, but full aspect is also powerful. When many planets of similar nature conjoin or aspect BB, then the effect is certain because it overrules contrary effects of other charts based solely on BB or solely on any other tool or technique.
But I oppose this type of lop-sided astrology. Read the first page of my website (http://vedicastrology.wikidot.com/) esp the Systems Approach.