Looking for a free service where I can view past 1 minute charts for the purposes of backtesting. The best I have right now is Tradingview.com but the 1 minute charts only go back about 2 weeks. Any ideas?
try marketvolume.com. It is paid service, but they have 1-month free trial. See below the S&P 500 chart that I scrolled back to Dec 2014. I do not know how for the history goes I just got tired to scroll.