Where on the net can I find a chart of the Dow and s&p 500 that will show something close to this.. a weekly 1 year chart based on the average of the last 10,20 or even 50 years. I just want to see the average yearly seasonality of the major indexes. I would also like to see the same for VIX I really needs to go back at least 10 - 20 years if possible. Thanks for any suggestions.