That is precisely why I pay attention to the Gann Angle points (based on data, not voodoo).
But, as logical as the presentation in your first link (I read it in its entirety), he comes to the same conclusion as the traders... read this from the link:
Useful Application Of The Siderograph
Just because rising lines of the Siderograph do not necessarily reflect rising prices in the DJIA, there is one very important benefit in the Siderograph that still remains effective. When the Siderograph makes a change in direction, however minor, it appears that the DJIA also sometimes changes direction exactly at the same moment (+/- 1 or 2 days in most cases). One very good recent example was the mini-crash on October 28, 1997 -- the siderograph correctly predicted the bottom of the sell-off, exactly to-the-day.
Maybe this is why the Bradley is placed into trading models? That brokers use it? I don't know, but when a computer program has instructions to 'sell at EOD' because the core 'modeling' in its program says to sell, then we have to pay attention.
And, from your second link, this is precisely why I pay attention to Bradley:
As Crawford and Eliades' returns indicate, most astrology is of little utility except for the effect it has on others. If you can predict how some will react to what the astrological cycles, perhaps say they will go long on this or that date, then you might be able to get in front of their recommended trades. I study this stuff hoping to find a way to get in front of trades
Thanks for both links!