Has anyone had experience or does anyone have any ideas about trading a basket of stocks with Robinhood? Like all of the CANSLIM Stocks or some of the AAII screens https://www.aaii.com/stockideas?a=menubarHome&expirecache (click on "10 year performance" or on "Since inception").
What would happen if I had been daytrading and short on SPY on DEC 18 2014 when there was a relatively quick spike? Lets say I had margined my account 3x (as it was daytrading). I don't have the daily data on this computer, but I imagine it was a very quick (seconds?) spike? What would happen if...