for the past two weeks I have noticed that huge stacked sizes will shift from bid to offer on many NYSE stocks. For example, CVX and other stocks on New York, there would be relatively huge sizes stacked (3 or 4, right after one another) on offer, then they all walk, and appear on the bid. They would repeatedly do this and on the chart is will have a zig-zag range motion... I guess they show the huge sizes to make the stock look weak and at the same time buy some stocks for themselves, then pulls the size, appear on the bid, prices go up, and they make a profit. Anyone else noticing this?