Yes, and sometimes they get up, no matter what!
I've seen a very good commercial on German TV
a year ago: there's a CEo of one of those online-lowcost-banks talking to the audience. He says " if the guys at your bank are as good as they say (talking about stock market performance)...*munchesafewpeanuts*...how come they still have to work?
What I'm trying to say is: No matter what you do, there will always be someone who believes that it is the other way round!
There are just so many aspects one has to take into consideration:
Self-fulfilling prophecies, differing expectations, less-than-efficient capital markets, non-rational behaviour, chart technology...the only thing that soubnds plausible is:
You can't beat the market systematicallyand at will by chosing a strategy...that's a fact...the only one when talking stock markets!