Ok - I note if one went back one week in time, you'd find an additional three instances of market rally signals being generated:

5/25/04 - (1.40%)
5/30/00 - 5.90%
5/31/88 - 3.10%
6/17/76 - (0.10%)
6/4/84 - (0.90%)

To me, a bit inconclusive.