Nature of Turn Dates

The Bradley Siderograph indicator is intended to reflect the overall level of market psychology.  Therefore, one might expect that high and low points in the Bradley Siderograph would typically be expected to take place when investors’ have an optimistic or a pessimistic outlook on the market, respectively.  However, rather than focusing on high and low points in the Bradley Siderograph, instead there is typically a focus on “turns” in the Bradley Siderograph.  Why is there a focus on Turn Dates instead of a focus on the overall level of the Bradley Siderograph?  Find out why below:


What is a Turn Date?

A Turn Date takes place is when the Bradley Siderograph indicator changes in direction from an upturn to a downturn or vice versa.  The Bradley Bars are a refinement of the Turn Date concept as they are intended to more precisely quantify the magnitude of Turn Dates rather than judgmentally estimating when the Turn Dates take place.


Interpretation of Turn Dates

As mentioned above there is typically a focus on “turns” in the Bradley Siderograph indicator as compared to whether the turn is taking place when the Bradley Siderograph is at a high or a low point.  I believe this is the case because the Bradley Siderograph makes the simplifying assumption that some planetary aspects are always good (i.e., sextile and trine aspects) whereas other aspects are always bad (i.e., squares and oppositions).  However, in reality it’s not so simple that all trine aspects are good and all square aspects are bad.

For example, the formula for the Bradley Siderograph in Donald Bradley’s book “Stock Market Prediction” assigns a positive weight for a trine aspect between Mercury and Mars.  However, based on my calculations this aspect has historically had a strong negative correlation with the S&P 500 (See below).



What would Donald Bradley think about this interpretation?  In his book “SoIar and Lunar Returns” Donald Bradley wrote the following:

“Inasmuch as the ‘planetary natures’ are held to be inviolably fixed, their inherent influences are not in any way qualified by the ‘nature’ of the aspect…The natures of the planets involved determine the meaning of the configuration, and not the popularly assumed ‘nature’ of the aspect concerned.  In other words, any aspect involving Mars, Saturn, or Neptune, trines and sextiles included, is read as an adverse indication.  Any aspect between the Luminaries [i.e., the Sun and the Moon] and Venus, Jupiter or Uranus, squares and oppositions included, are taken as favorable auguries.  The truth of this will descend with an impact upon the newcomer conditioned to thinking ‘all squares are bad and all trines are good, etc.'”

Therefore, it appears that Donald Bradley was familiar with the concept that the “natures” of the planets involved in a planetary aspect are an important determinant of the actual impact of the planetary aspect.  However, given the limited technology available in the middle of the 20th century Donald Bradley used a simplifying assumption when he assigned a positive weight to all “good” planets and a negative weight to all “bad” planets.

Advanced Astro Indicator

In contrast to the Bradley Siderograph, which assigns positive and negative weights to “good” and “bad” planetary aspects, respectively, the Advanced Astro Indicator does not presuppose that any particular aspect between any pair of planets is good or bad.  Instead, it looks to see what the actual historical correlation was between that aspect and the security in question.  If a particular aspect between two planets historically took place when the security was at a high or a low point, the weight for that aspect would be positive or negative, respectively.  This is especially useful when we consider that some securities typically move inversely with one another (e.g., the S&P 500 and the VIX).  This is why there is not a focus on “Turn Dates” for the Advanced Astro Indicator (i.e., because this indicator has already taken into account whether a planetary aspect has historically been associated with an upturn or downturn in the price of a security, respectively).  Instead, the Advanced Astro Indicator is intended to correlate as much as possible with the actual price performance of a particular security.


Advanced Astro Indicator Financial Astrology Software