Look at ARNA
Was supposed to be a dead drug but it was brought back to life and ARNA went from $2 to $13.
You are looking to take profits on good news or stock popups or short the opposite.
Today was a nice quick buy at 5.85 where it sat for a while before it popped to 6.35.
I was in at 5.85 and out at 6.25 for a nice $500 for the day.