[heckingoodtimes]

Fidelity and Vanguard for best execution—which is the most important aspect for me. Self-clearing, sufficiently capitalized and don’t accept PFOF. They are improving their trading UI and I think they’re definitely headed in the right direction on that front. I don’t yet trade options on either, so no comment on that.

[mcny]

Vanguard index funds are pretty much anyone who isn’t wealthy needs.

The only think I can’t figure out is why isn’t it possible to park USD 5k in cash in my Roth IRA at Vanguard every April and have them buy VTSAX if it goes below some threshold automatically say USD 60.

[PascLeRasc]

You're hoping to "buy the dip" here, right? You can set up a stop order to do that. It'll just have to be for the ETF version of a fund.

[matt_s]

I would second this answer. These two are big enough to have solid support paths should you have questions and want to talk to a human. I don't find UI to be important because I'm not in the apps or web sites often enough and I don't do options.

[Hedgemaster]

Thank you. Fidelity doesn't charge PFOF on stocks but they do accept PFOF on options. The bid-ask spreads for most stocks in negligible so PFOF-related damage wouldn't matter that much anyway, what cannot be said about options..