I used to trade 4 stocks day-in day-out:
GS, AAPL, RIMM, SPY
Now RIMM is dead. GS and AAPL are not moving fast enough.
For the past 3 months I have beeing trading only 1 stock (EFT):
SKF
No you don't need a stop. With its volatility, your stop order would probably get blown as soon as you set them. It can wiggle up and down $1.00 every 20 seconds. You need a lot of screen time and undivided attention.