Not much history on it but if one were to put a qualifier as to say highs above 490 issues then counting today it has only happened 3 times over the past 13 years. In october 1997 it was followed by a small correction lasting 21 days then a move higher over the next few weeks to months. In early september 2003 it was followed by a smaller correction lasting approximately 14 days followed by a higher high. If we follow trend the correction would last from 7 to 21 days and then a higher high would be made over time????????? Open to wait -n - see category there. The third time could be the charm........