Order book walls: what they are and how to read them
A wall is a very large order at one price. Sometimes price turns around at it, and sometimes it goes straight through. Here's why.
What a wall is
A wall is a limit order many times larger than its neighbors on that coin. The comparison is what counts: a size that's huge for an illiquid coin is invisible on Bitcoin.
These orders often sit at round prices and near important levels, where other participants' stops and pending orders gather.
Why price reacts
To pass a wall, the market has to fill its entire size, so price often slows down there. Many traders also see the wall: some place orders in front of it, others close positions, and that reaction strengthens the effect.
Three scenarios at a wall
| What happens | What it looks like | What it suggests |
|---|---|---|
| It holds | The order stays, gets hit, price doesn't pass | A buyer or seller is willing to fill at that price |
| It's eaten | The size melts along with trades in the tape | The other side is stronger, price may pass |
| It's pulled | The order vanishes with no trades | It may have been there just for show |
Size alone isn't enough. What matters more is how the order behaves when price reaches it.
What else to look at
- How long it's been there. An order that's been standing a while usually deserves more attention than one that appeared a second ago.
- Whether it refills. If the size comes back after trades, that often points to a large participant.
- Where it sits. A wall at a notable level usually means more than one in empty space.
- Which exchange. An order on a low-volume exchange decides little for the whole market.
Common mistakes
- Entering only because a wall appeared. It can be pulled at any moment.
- Placing a stop right behind it. If it's eaten, price often passes the zone quickly and slippage will be larger than usual.
- Forgetting position size. A wall doesn't cancel the rules of risk management.
How to find walls
Doing it by hand takes too long: there are hundreds of coins and orders live for minutes. That's why traders use wall screeners. In MAMAY the Level Bounce screener watches large orders, and MAMAY Breakout takes walls into account when looking for active coins. More on the crypto screener page.
FAQ
What is a wall in simple terms?
A very large order in the book at one price, many times bigger than its neighbors. It often acts as an obstacle for price until it's eaten or pulled.
Why was the wall pulled just before price reached it?
The owner may have changed their mind, or it may have been placed for show from the start. That's why traders watch how an order behaves, not just its size.
Do stocks have walls too?
Yes. In MAMAY the order book and tape also work for Moscow Exchange stocks, but liquidity is different there, so what counts as "large" differs too.