Well, if you are bullish, a wall like that means you don't get much price slippage when you buy.
Many people have given this same slippage explaination over and over again since I joined this forum.
The reason I don't believe it is that I've always found it quite odd that someone would sometimes wait for the price to increase by as much as a dollar or two per Bitcoin until we hit a wall only to then buy it all to avoid slippage
