I had a stock that I thought was a sure fire winner, Baker Bros., nice chart set-up I thought, good pipe line, etc, CHTP :here are the details, bought 200 shares @ 3.20 on 1/8/14, and immediately put in a "hard stop" at 2.26; or 29%, it was meant to be a starter position so relatively small. Just 2 days later on 1/10/14 the stock tanked to guess, yep, 2.26 - hit my stop to the fr'kn penny. Then a day or two later price was over 5.50, I tried to explain to a so called buddy and he thought I was so crazy he hung up on me. here's a link if anyone wants to see the chart (no longer available), just ignore Clay if he bothers you LOL. 2nd link gives the why "twist" to the charade.
(look for the extreme low then the gap to the extreme High immediately following)