What the display contains
A depth of market ladder, usually shortened to DOM, is a vertical list of prices. Beside each price on one side sits the total quantity of resting buy orders at that price. On the other side sits the total quantity of resting sell orders. The last traded price is marked, and the whole thing refreshes as orders arrive, are cancelled, or get filled.
Everything on it is a limit order that has not happened yet. That is the single most important property. A ladder is a queue of conditional intentions: each number says somebody is willing to transact at that price if the market comes to them. Nothing on the ladder is a completed trade, which is why traders who use one keep a trade record open beside it. The ladder tells you what is waiting. The trade record tells you what actually got done, and only the second of those is a fact about the past.
Why this is a futures market display
A ladder requires a single place where all the orders are. A futures exchange provides exactly that: one matching engine, one queue per price, and a published feed of the aggregated resting quantities. Spot gold has no equivalent. Price is quoted bilaterally by dealers, each running its own book, and there is no consolidated order queue to publish.
So a spot gold trading screen typically shows no depth at all, and where something resembling depth is shown it is a partial or aggregated construction covering one slice of the market, not the market. The chart volume figure on spot is tick count, the number of quote updates, so it cannot substitute either. What a spot trader can honestly use is data about unusually large resting orders and clustered client positioning where a venue publishes it, which is what the Whale walls reading on the live chart is built from, with the stated limit that a resting order can be withdrawn before price arrives. The underlying market difference is described in spot gold against gold futures.
The three things people look for
Experienced ladder readers watch a small number of properties. Stacked size means several consecutive prices each carrying large quantities, which suggests a region rather than a single level. Thinness means the opposite: prices with little resting behind them, where a modest order can travel several levels because there is nothing in the way. Rate of change is the most informative and the hardest to describe, because it is about how quickly quantities appear and vanish as price approaches.
Of the three, thinness tends to be the most actionable, since it explains why a move accelerates through certain regions and stalls in others. Stacked size is the most over interpreted. Large resting quantity looks like a wall, and the word itself encourages the assumption that it will hold. The honest version is that it shows where someone currently wants to transact, at a size they have chosen to display.
Resting size is intent, not commitment
A limit order can be cancelled at any time before it is filled, instantly and at no cost. That single fact limits everything a ladder can tell you. A large quantity sitting three levels above the market is a statement about where somebody wants to deal right now. If price approaches and the order vanishes, nothing was defended and no information about the level was ever confirmed.
There is also the deliberate case. Placing size with no intention of trading it, in order to influence how others read the book, is prohibited market conduct on regulated venues and is nonetheless attempted. From the outside a pulled genuine order and a pulled artificial one look identical. The practical conclusion is that a visible wall should change what you watch for, not what you conclude. The question becomes whether the size is still there when price gets close, and whether trades print into it rather than around it.
Speed, and the moments the ladder is unreadable
In quiet conditions a ladder updates at a pace a person can follow. Around a scheduled release it does not. Quantities appear and disappear faster than the eye can track, the book thins as participants withdraw ahead of the number, and the levels nearest the market can empty entirely for a moment. Any read taken from the display in those seconds is a read of a snapshot that has already been replaced.
This is worth knowing even for a spot trader, because the thinning explains something visible on any chart: why price travels so far so fast around releases and why execution costs jump at the same time. There is less resting opposition in the way, so a given order moves price further. The chart side of that behaviour is in reading a fast market. The conclusion most ladder traders reach is to stop reading the book across the release entirely and wait for it to repopulate.
Depth plus the trade record
A ladder on its own is half the picture, because intentions only matter once they meet aggression. Pairing depth with the record of executed trades is what turns the display into a read. Large resting size that trades heavily and holds says something. The same size withdrawn before any trade reaches it says nothing. Size that is consumed and immediately replaced says something different again, and that signature is what people are looking for when they suspect hidden quantity behind a displayed order.
This pairing is the foundation of footprint style displays, which arrange executed quantity by price and period so the interaction becomes visible after the fact rather than in real time. What those displays contain and what they do not is covered in what a footprint actually shows. On spot gold neither half of the pairing exists in authoritative form, which is the honest position to hold rather than an obstacle to engineer around.
What to take from it as a spot trader
Understanding the book is worth the effort even if you will never read one, because it supplies the mechanism behind things a chart trader sees constantly. Levels hold because resting size sits there. Moves accelerate because a region was thin. A sweep reverses hard because the orders that were run were resting stops and the aggression ended once they were taken. That last pattern is set out in liquidity sweeps on gold.
What does not transfer is a ladder based method. You cannot run depth strategies on a feed with no depth, and any pressure style reading built from a spot feed inherits exactly the same limitation. The workable position is to use the book as explanation and price as evidence: structure, levels and how price behaves on the return are what a spot trader actually has, and they are enough to work with as long as nothing more is claimed for them.
FAQ
Can I get a DOM ladder for spot gold?
Not a real one. A ladder requires a single central order queue, which a futures exchange provides and spot gold does not, since each dealer runs its own book. Anything resembling depth on a spot platform covers one slice of the market, so it cannot be read as the market overall.
Does a large resting order mean the level will hold?
No. A limit order can be cancelled instantly and at no cost, so large size is evidence of where somebody currently wants to deal, not a commitment to defend. The useful question is whether the size is still present when price arrives and whether trades print into it rather than around it.
What is the difference between depth and the trade record?
Depth shows orders that have not happened yet, so it is a queue of conditional intentions. The trade record shows executions, which are facts about the past. Reading one without the other is how people mistake displayed intent for participation, which is why ladder traders keep both open.
Why does the ladder become unreadable around news?
Participants withdraw orders ahead of a scheduled number, so the book thins, and the remaining quantities change faster than a person can follow. The display is still accurate, but any snapshot you manage to read has already been replaced. The usual response is to stop reading it until the book repopulates.
Is spoofing the same as a large resting order?
No. Most large resting orders are genuine. Placing size with no intention of trading it, purely to influence how others read the book, is prohibited conduct on regulated venues. The difficulty is that from outside the book a pulled genuine order and a pulled artificial one look identical.
ⓘ See these ideas on real price: open the free XAUUSD live chart.