if u connect 9/1/88 and 10/1/02 spx on a monthly ,supp comes in around 1209,so that dip could have been it for the next 4 years,,on the flipside if this economy is the beginning of armageddon ,the way the technical economic math wizards with all there statistics are pontificating,(that should be a buy signal in itself),if u connect the year 1937 low of 18,and the 1968 low of 108,the trendline comes in at 1074,for a yearly low in 2008