My current theory for flipping AAPL is to focus on the first 30-60 minutes of trading using the 1min chart with RSI
Many days, because of premarket activity, you have a possible long and/or short position within the first 60 minutes.
For yesterday (below), you would go long by 9:45am (as indicated by the RSI) and then be out by 10am, then you can do a quick short position (again, as indicated by the RSI) until the RSI hits 50.
Use 250 shares and you can make $500-1000 within the first hour on AAPL alone.
I've tried to trade after the first 60 minutes, but my success rate dropped dramatically.