Here are the limitations for Robinhood on TradersPost:

Trader to trader... you should consider transferring your assets to a more robust brokerage. Robinhood was designed for casual investors to throw money into a volcano. Other brokerages are more suitable for high-volume traders with automated strategies.

Robinhood's commission-free trades are not free! Definitely shop around.

Hope this helps. It could be a while before they add the features you need, but at least you've got some options :)