While tempting, it's just not rational to think that there is a big conspiracy out there. In the past, I would find myself thinking that the "powers that be" were buying stock just to get prices high enough so they could short them, or vice-versa. It's a crazy thought just trying to reason out why a stock was going against me. While it does seem that there are those with more money than God that can move the markets at will, it just doesn't make sense. There are many forces out there and markets are moved by everyone's collective self-interest.
And, if there is a conspiracy, learn to trade with it! Take the recent rally as an example. As a technical trader (of course with some fundamental incling), can I figure out why the market has been racing and continues to advance without much positive new on the economic or earnings front? No, I just follow the prevailing trends and even the micro movements. I learn to trade the markets regardless of where they go. Like the little birds that pick the bugs off the water buffalo in Africa. They have to go where the buffalo are and where the bugs are. It is the stubborn, hungry bird that insists that the bison shouldn't be over there by the watering hole but rather over here under the trees. Trade the conspiracy!