Try DCA into endowus fundsmart - Amundi Prime USA fund @ 0.35% per annum. It is the S&P500 equivalent. In terms of fees for robo, I don't find any that others that can beat this. I basically set it on recurring basis and has been doing it for 3years now.
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I recommend IBKR as it has one of the cheapest fee and have Ireland-Domiciled S&P 500 ETFs (Withholding Tax 15%). Syfe trade does not seem to have Ireland-Domiciled S&P 500 ETFs thus withholding tax will be 30%.

For DCA into index fund, the cost of commission and platform fee could eat into the capital. How about ownself dca into s&p etf every month using brokerage with no commission fee such as Td ameritrade or webull?

• It can be fuss free if you set Gtc order to buy at a specifc price, or even use enhanced dca method.

Alternatively,

• One can set a specifc date each month or each quarter to buy the s&p etf, though this method require the person To be emotionless and disciplined.

Would be grateful for comments on above suggestions!

Agree Syfe trade