A single considerably large buy order or a collection of buy orders fixed at a price level.
A buy wall consists of a noticeably large buy order or collection of buy orders at a specific price level. These are price points characterized by unusually voluminous buy orders, often leading to voluminous trading activities that might eventually influence the perceived value of an asset when the order is filled.
Buy walls can be driven by traders with a lot of cryptocurrencies and therefore effective trading power. These traders can establish buy walls to drive up the price or perceived value of a crypto asset, thereby disrupting market sentiment and provoking a lot of trading activities within a markedly brief period.