Historic Charts

I am looking for a site that gives historic charts of cotton, corn, S&P's etc.. going back more than 10 years.

I have found a bunch of sites that give free charts going two years back but anything past that is tough to find.

Any suggestions?

Thanks

 

25 years: http://www.barchart.com/futures/

 

Thanks

 

If you are looking for daily data, you could use Kinetick EOD with NinjaTrader for free.

http://www.kinetick.com/end-of-day