Mercury Harmonics indicator represent the tropical zodiac energy forces that develop through the course of Mercury in the zodiac wheel. The waves indicates the strength of cardinal energy (initiator) and this forces seems to correlate well with the most relevant pivot points. Consider that Mercury represents the commerce, negotiations, transactions and trading. Determining how this forces act to produce negotiation of short/long positions is the financial astrologers researchers homework. I'm not going to disclose my conclusions except for the serious researchers that leave a comment with their own observations in regard to this forces.
Note: The Mercury Harmonics indicator is based on an ephemeris array that covers years 2010 to 2030, prior or after this years the data is not available, this daily ephemeris are based on UTC time so in order to align properly with the price bars times you should set UTC as your chart timezone.