The truth is, it's nothing more than trading. We all try to get the best price for our USD/BTC trades. Why it's called manipulation when I trade thousands at a time vs hundreds I don't know. Maybe it's the fact that the market really isn't that big and feels like it's being "controlled" by these large transactions. Should I not trade anymore? If you played with the same volume I do, you'd see that building a "wall" to add support allows you to pick up or sell more coins at a better price. It's really that simple.
So tell me, is it REALLY manipulation?
One strategy is where a trader buys some shares then put a limit buy order for a lot more shares a little above the market price. Let the algo wars begin.