In response to dbphoenix question, because of BIDU. I placed a market order on BIDU that one morning when it was $347. The price then climbed to $350 and I did not put a stop on time. It then plummetted to $300 within 45minutes and my market orders did not execute.
It's not so much that BIDU was dropping. The drop of BIDU caused a ripple effect throughout the whole market. Everything that I was holding was dropping along with it. I had to sell off most of my holdings that very day. the drop was took out 1/2 of my porfolio. Everything that i held was sold off immediately because of the stops. I bought back most of the stocks that were doing well. the very next day, most of the stocks recovered but by late afternoon, everything started falling. And the day after. I was on a business trip and did not have a chance to monitor my account and so, i was left with $50000 left in my account. With that $50000, I wanted soooo much to get it all back so I took revenge on the market. I overtraded and overbought. Thus, now, I'm left with nothing.
I hope that helps.
I'm writing this story not because I want to tell you how stupid i was. I tell you that the market is a pretty mean and nasty place. I remember that very day when BIDU dropped. there was no news on it. In fact, everything was very bullish as the news were comparing them to GOOG and how much stronger BIDU is... blah blah blah. After the drop, their CFO was questioned as to what happened. The only answer they got from them was, "I don't know". how convenient...