Most people loose if they cost avg. down , not a good practice in trading, buy your first 1/3 of shares , set your mental stop loss and stick to it , if you are wrong take the small loss, but if you are right buy your next 1/3 once you get green and stick to your sell target or if while watching level 2 you start to see lots of shares on the ask show up , take profits , you cant loose taking profits.