I haven't read the thread but here's the reason.
When uninformed traders buy, they are creating demand so the professional traders can sell to them. When uninformed traders sell, they are creating supply for the professionals, who are buying. The smart money is one step ahead. Uninformed traders to act like sheep, mainly commit to one direction, then get run over.
The best way for pros to create an up move in the market is to have the market go down FIRST so that who ever is willing to sell has done so and is locked in a bad trade, and they can easily move price up now without active selling coming in against them. They understand supply/demand and I don't mean Sam Seiden crap.
oh yea a few more reasons..big stops, small targets, lack of discipline and bad information.
No further posts required here lol.