What are some good ETF for long term DCA with good returns, with low expense ratio? Either world indices etf or s&p500 etf. Not by roboadvisor, but manually dca ourself.

I would think SPY seems to be good enough

I do CSPX + EIMI in

If you're planning to invest a large amount of money ($500) regularly over time, CSPX may be the most affordable option to consider. On the other hand, for smaller amounts, VOO may be more suitable.

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When it comes to selecting a broker, you can use Interactive Broker for CSPX and Syfe for VOO, which provides two free trades per month.

Good read on s&p500 ETF by Syfe and Dr Wealth.

https://www.syfe.com/magazine/voo-vs-spy-vs-ivv...

https://www.drwealth.com/spy-vs-voo-vs-ivv/

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Syfe Trade give you 2 free trade each month where you can dca to the US domiciled ETF.