That's bad advice. period!!! Countless of times I've witnessed a drop right before a spike up. To sell your position at a lost only to miss out on a 20 to 4000% increase minutes later is asinine and foolish. By no means I'm I predicting that this company is going up 4000% it's just an example. My advice is to Read up on how to invest and trade in the market. There is a lot of good free information out there, look for it, find it and learn.... Good Day to you...