Oh the walls? You can always break them if you have pockets filled with some BTC. Im not sure what you talking about as I can't can see the image either on my monitor but one thing is sure that the specified coin might not be having much of the market cap. In such instances people might be buying and selling at the price with little differences and thus creating a wall which is almost similar at buy and sell point. That's just speculation and I have seen many coins like that.

Usually this picture can also be seen when the coin hits the exchanger and the trades are not in run yet.