SPX weekly, simple markers - <a href="http://stockcharts.com/h-sc/ui?s=$SPX&p=W&yr=3&mn=0&dy=0&id=p18300699982" target="_blank">http://stockcharts.com/h-sc/ui?s=$SPX&p=W&yr=3&mn=0&dy=0&id=p18300699982</a>