SP500 data sets

1. Histdata

https://www.histdata.com/download-free-forex-data/
S&P500 M1 since November 2011 No volume Forex

2. DukaScopy

https://www.dukascopy.com/swiss/english/marketwatch/historical/?fbclid=IwAR1OYTjXJi-gAhgyPzdXKArpYz3NaFPP-wGX_S8bdCRrI_Bpqqty75q3iRM
S&P500 Weird volume idk what is going on there, good in the actual time of markets 9:30-16:00 but in pre-market and after-market some weird stuff is going on Tick data ! can be very useful + M1 Since 2012

3. Tick data

https://www.tickdata.com/

4. Tickstory

https://tickstory.com/back-testing-in-metatrader-5-with-99-modelling-quality/
S&P500 Volume Since at least 2013 Slow download but w/e

5. Yahoo finance

https://finance.yahoo.com/quote/%5EGSPC?p=%5EGSPC
Daily?

6. MT5 platform