According to MRCI the correlation between the SPX 1967 and 2012 has now risen to 90%. From a major low on Nov 20, 1967 @ 90.09 to the major high @ 97.84 on Jan 9, 1968 the SPX had gained +6.75%.
The time and price correlations point to a major high on Jan 7, 2013 @ 1.454 - slightly exceeding the 0.786 retrace of the Sep 14, 2012 high @ 1.446. See also HERE