SPX vs George Bayer's Rule #38 - Latitude of Mercury

MERCURY LATITUDE HELIOCENTRIC
In the present rule we shall use the heliocentric Latitude of Mercury ... There are four values in this line which bring forth changes of trend. These values are: 0°00', 3°21, 6°42, and 7°00’. The inside values are effective on either side, on the way up also on the way down. Some mighty fine tops and bottoms are produced when Mercury in this motion passes the above mentioned degrees.

[George Bayer (1940): Stock and Commodity Traders´ Hand-Book of Trend Determination. Carmel, California; p. 41] 

2012-12-04 11:39 (Tue)    MER Lat = 6°42'
2012-12-15 12:07 (Sat)    MER Lat = 3°21'
2012-12-24 13:10 (Mon)    MER Lat = 0
2013-01-03 17:08 (Thu)    MER Lat = -3°21'
2013-01-19 02:39 (Sat)    MER Lat = -6°42'
2013-01-24 03:54 (Thu)    MER Lat = -7°00'
2013-01-28 15:41 (Mon)    MER Lat = -6°42'
2013-02-07 05:49 (Thu)    MER Lat = -3°21'
2013-02-12 05:28 (Tue)    MER Lat = 0
2013-02-16 19:32 (Sat)    MER Lat = 3°21'
2013-02-24 01:29 (Sun)    MER Lat = 6°42'
2013-02-27 02:56 (Wed)    MER Lat = 7°00'
2013-03-02 10:57 (Sat)    MER Lat = 6°42'
2013-03-13 12:23 (Wed)    MER Lat = 3°21'