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PIVOTS and data for PIT traded S&P500

Hi again guys:

Do any of you know where to get free/cheap RTH session only Open, High, Low, Settle historical data, and/or daily PIVOTS calculated for the Pit traded S&P500?.

Thanks for any responses.

ThinkorSwim has a free platform I believe with all the bells and whistles. Download the software and then register.
The data is wrong on trademarkets, but thanks anyway.

ThinkorSwim looks like another broker trading platform. No SP RTH data there either, but thanks anyway.

This place seems OK: