> Execution on RH is already pretty poor, this seems like a recipe for disaster.

Can you explain this? I like Robinhood for the free ETF and index trades. Haven't really noticed any issues in the year I've been using it.

RH needs to make money somehow.

The article recommends only trading after hours with a limit.

Edit: Sorry, I saw that in the help center, https://support.robinhood.com/hc/en-us/articles/214681903-Ex..., "That means your execution price can vary more than during core market hours, so we suggest using limit prices".

From my underatanding, they are using the same exchanges than other low cost brokers. It has been confirmed with my experience using TradeKing in parallel of RobinHood (same spreads and same speed of execution.)

I haven't tried trading after hours yet, but it had happenned to me that I wish I had the option in the past.