On the Geometric Date Calculator the time symmetry of 5/20/13 and 5/24/13 measured from both the low and high of the 1474.51-1343.35 leg used to form the triangle necessary to calculate the time symmetry is highlighted so the probability was strong for a reversal that week, and that is what occurred.
The Fibonacci Time Ratio Calculator chart highlights the 5/20/13 time symmetry which is the 1.50 fib extension of the previous two significant tops at 1422.38 and 1474.51.
The price and time zone had symmetry and that was confirmed by the technical evidence of a very O/B condition, so it was a high probability zone which has resulted in a -5.3% reversal so far from 1687 to 1598 so far.
There is key Pi symmetry in the third week in June and the first week in August which I mentioned in my previous article and I will address in my next commentary.