Looks like the 10 week SMA would have been equally useful: <A HREF="http://chart.bigcharts.com/bc3/intchart/frames/chart.asp?symb=spx&compidx=aaaaa%3A0&ma=1&maval=10&uf=0&lf=1&lf2=0&lf3=0&type=4&size=2&state=8&sid=3377&style=320&freq=2&startdate=4%2F1%2F1991&enddate=8%2F1%2F1994&comp=NO%5FSYMBOL%5FCHOSEN&nosettings=1&rand=7630&mocktick=1" target="_new">http://chart.bigcharts.com/bc3/intchart/frames/chart.asp?symb=spx&compidx=aaaaa%3A0&ma=1&...</A>