The Bradley Siderograph is one of the most valuable tools of stock market prediction in the field of financial astrology, and I’m excited you’re here to learn more about it.  This site provides a general overview of this stock market turning point indicator as well as advanced applications that go beyond the scope contemplated by Bradley’s book.

Origins of the Donald Bradley Siderograph

In 1948 Donald Bradley wrote a book called “Stock Market Prediction: The Planetary Barometer and How to Use It.”  This book presented a tool known as the Donald Bradley Siderograph, which is intended to leverage “the potency of major planetary aspects…to prove the correspondence between planetary operations and market responses.”  The term “siderograph” means star graph.  The ancients saw planets as “wandering stars,” which is how they developed the predecessor word for “planet” in ancient Greek (i.e., “astēr planētēs”).

The Bradley Siderograph is one of the most interesting and popular forecasting methodologies in the field of Financial Astrology.  This field involves leveraging astronomical and astrological data to understand and forecast activity in the financial markets.  However, Financial Astrology is far broader and richer than this methodology alone, and its origins date back several thousand years.

How to Use the Donald Bradley Siderograph

The siderograph is typically used to identify turning points (i.e., trend reversals) in the market over the medium- to long-term rather than predicting the exact movement of the market across time.  Turning points include inversions, which occur when the stock market bottoms when the siderograph tops, or vice versa.  Therefore, turning points in the siderograph can indicate both tops and bottoms in the stock market.  It is important to not place undue influence on the amplitude of the siderograph.  Turning points taking place at the top or bottom of a large crest do not necessarily imply a more significant market turning point.  Also, siderograph turning points typically indicate market turning points within 4-7 calendar days rather than being exact to the day of the turning point.  Sophisticated market professionals use the Bradley siderograph in conjunction with other fundamental and technical market factors rather than using it alone to inform their trading decisions

The Calculations Behind the Donald Bradley Siderograph

Donald Bradley’s siderograph is based on major planetary aspects and the declinations of Mars and Venus.  The siderograph assigns varying weights to each planetary aspect depending on its exactness.  For example, if two planets are 90 degrees apart they will receive the full weight for a square aspect (i.e., an aspect of 90 degrees).  The siderograph allocates a lower weight to aspects that are close but not exact (e.g., an aspect of 88 degrees, which is close to a square aspect but is not exact).  Also, if you’re interested in learning about the mathematical formula underlying the Bradley Siderograph, visit our page that provides an overview of the Donald Bradley Siderograph Formula.

Bradley Siderograph 2016 Turn Dates Graph

Are you looking for the turn dates for this year?  If so check out our graph of the 2016 Bradley Turn Dates.  If you want to see how effective the Turn Dates were last couple of years in predicting turns in the S&P 500, click here for 2015 and here for 2014.

Video Overview of Financial Astrology and the Bradley Siderograph 

The video below provides an overview of:

  • What is Financial Astrology and why is it something we would want to consider.
  • The Bradley Siderograph including what goes into it and how it works
  • The new Bradley Bars Dashboard 2.0, which is an Excel-based tool that makes it easy to graph the Bradley Siderograph against various securities.

Click here to learn more about the Bradley Bars Dashboard 2.0


NEW as of December 20, 2016!  PDF Version of All Advanced Astro Dashboards for 2015-2017

Would you prefer to leverage a much easier to use PDF version of the Advanced Astro Indicator instead of the Excel version?

This PDF version comes with screen shots of a graph of the Advanced Astro Indicator for each of the available securities for 2015, 2016, and 2017.  Note that there are various versions of the Advanced Astro Indicator that use different weights, and the specific Advanced Astro Indicator selected for this file were chosen based on the extent to which they appear to be closely matching the security’s historical price movements.

Click here to see an example of what the screen shots look like for one of the 97 securities.

Click here to learn more about the Advanced Astro Indicator or click here to learn more about the historical correlation analysis for the Advanced Astro Indicator.