What levels are afraid of the crowd
Most of all the "crowd" is afraid that the price will reach the levels where it is installed (crowds) of stop loss. This is obvious, because in this case a loss will be received. It is natural that in most cases the price works out such levels. Let me demonstrate this "working out" in the screenshot. We can see how each cluster closest to the price is "punctured by quotations." This is explained by the fact that clusters of stop-loss are a zone with liquidity, allowing a large player to open a deal at the best price.