RE:RE:RE:RE:RE:RE:WallThe way I understand it is that a wall is the bid/ask that keeps the price from budging a certain direction. For example, when the 4.7 million dump at 55 happened here, the stock didn't drop lower than five because a wall was set at 5 by an ask volume of about 9 million daily. So it just went back and forth until the ask was depleted and now the stock can rise again