A buy wall occurs when a large buy order, or multiple buy orders at the same price, appears in a crypto exchange’s order book. These walls, often created by whales or institutions, act as strong support levels because the market must absorb significant capital to push prices lower.

Buy walls are frequently used as a market manipulation tool, giving the illusion of strong demand and influencing other traders to place their orders just above the wall. While they can stabilize prices temporarily, buy walls often disappear quickly, move with market shifts, or get completely filled during strong bearish trends.

In short: Buy walls can signal demand but are also strategies used by whales and bots to control price movements.