Hi all, I post it here because actually I am simultaneously looking for data for both $SPX and the option on that... I signed up for Opentick today. And I used its sample CSV Historical data downloader to download historical data. I am surprised to find that OpenTick does not have S&P500 index data back into 2005 or earlier. HistCsv data.csv feed1.opentick.com 10010 MyUserName MyPassWord /e CO /s $SPX 05/1/2005 16:00 06/1/2005 17:00 /tm /o daily 1 Connected to feed1.opentick.com Historical data for 05/1/2005-16:00 - 06/1/2005-17:00 was requested. Downloading data... Progress: 100% Data was successfully downloaded. And then the CSV file was empty. What was the problem? Any other better reliable data source? I am willing to pay a fee if there is a hassle-free solution in the long run for reliable and good quality data sources...