A ladder is a vertical column of prices, one per row, with the market sitting somewhere in the middle. To the left of each price sits the quantity bid there. To the right, the quantity offered. Your own working orders occupy their own columns, so you can see your limit resting three ticks below alongside everyone else's.
That layout has been the professional order entry surface for two decades, and it exists because it collapses two jobs into one gesture: seeing where liquidity is, and putting an order exactly there.
What the columns are telling you
The size columns show displayed resting orders at each level, aggregated across the participants sitting there. On a futures exchange this is the real book, ten or twenty levels deep, updating many times a second. The numbers rise and fall as participants join and pull.
Read three things. Where the size is concentrated, since a level holding several times the surrounding quantity is a place where the market has to do work. How fast a level refills after it is hit, which separates a wall that is genuinely defended from one that was never there. And the trade column, which prints the size that actually crossed at each price, because resting orders are intentions and prints are facts. The distinction between resting and traded is the same one that separates a heatmap from a footprint in order flow tools.
Order entry is the actual product
Most of the value in a ladder is not analysis, it is execution. A left click in the bid column places a working buy limit at that price. Dragging the order to another row moves it. A right click in the same area often places a stop instead. Cancelling is one click on the order itself, and most platforms have a single control that pulls every working order at once.
Two behaviours follow from that. You place limits where the size is rather than where the mouse happened to land on a chart, and you get out fast, because the flatten button is a fixed target that does not move when price does. For anyone trading intraday with tight stops, the second point matters more than any pattern on the screen.
The ladder also enforces precision about order type. On a chart, "buy here" is ambiguous. On a ladder, you are choosing between joining the bid and paying the offer every single time, and the difference between those two choices, repeated across a few hundred trades, is a real cost line.
Fast one-click order entry means an accidental click sends a live order. Every ladder has a size selector, and setting it correctly before the session is the single most common source of expensive mistakes on this interface.
Spoofing, pulled liquidity and reading walls
New ladder traders learn to respect large displayed orders and then get punished for it. A visible wall can be pulled in milliseconds, and placing orders with no intention of filling them is market abuse that exchanges and regulators pursue, which does not stop it from happening.
The practical stance is to treat displayed size as a hypothesis with an expiry. A bid holding five hundred lots proves nothing until price arrives. If it absorbs several hundred lots of selling and stays, a transfer happened and the level has meaning. If it evaporates as price approaches, you learned that somebody wanted you to see it. Iceberg orders create the opposite illusion: a level that shows twenty and absorbs two thousand, because most of the size was hidden.
The ladder in FX and CFDs
Futures ladders show the exchange book. A spot FX or CFD ladder shows your broker's aggregated feed, built from whichever liquidity providers that broker connects to, and the depth is theirs rather than the market's. Two brokers can show meaningfully different pictures at the same instant.
The columns still have uses. You can see when quoted depth thins around a data release, which is the same condition that produces slippage on market orders, and you keep the fast click-to-place entry. What you should not do is import futures ladder tactics wholesale and assume the size you are reading represents the whole market. Our own depth of market guide goes through what the aggregated view does and does not represent.
Column settings that change how you trade
Most ladders let you fix the price column so it stops recentring every time the market ticks. Leave it scrolling and your eye chases the middle of the screen. Pin it, and your levels stay in the same physical place on the monitor for the whole session, which is worth more than it sounds when you are placing orders by memory of position rather than by reading the number. The other setting to check is whether the platform aggregates several ticks per row, because a ladder showing one row per tick on an instrument that moves in half-tick increments is showing you half an empty screen.
When a ladder is the wrong tool
If your holding period is measured in days, the ladder adds nothing. Levels five ticks away are irrelevant to a swing trade, and watching them updating twenty times a second is an invitation to interfere with a position that was working fine. Traders who move from swing to ladder trading almost always over-trade for the first month, because the interface makes acting cheap.
The ladder fits a trader working intraday, sizing in a defined number of contracts or lots, with a plan expressed in ticks. It is a precision instrument for execution, and it does not tell you what to trade or when. Leveraged trading carries a high risk of loss, and a faster interface increases the number of decisions per hour rather than the quality of any one of them.
"The ladder made me a better executor and briefly a much worse trader. It removes the friction, and some of that friction was protecting me."
— Alex Onta, Executive Director, SINGUARD
Key Takeaways
- A ladder shows one price per row with resting bid and offer size beside it, plus your own working orders in their own columns.
- Its real advantage is order entry: place, move and cancel at an exact price with one click, and flatten from a fixed target.
- Displayed size is a hypothesis until price arrives, since walls can be pulled and icebergs hide most of their quantity.
- In FX and CFDs the ladder reflects one broker's aggregated feed, not a central exchange book.
Frequently Asked Questions
What is a DOM in trading?
DOM stands for depth of market, and the DOM window or ladder is an interface listing prices vertically with the resting bid quantity on one side and the offer quantity on the other. Traders use it both to see where liquidity is sitting and to place orders directly at a chosen price.
Is DOM trading useful in forex?
The interface works, but the data behind it comes from a broker's aggregated liquidity providers rather than a central exchange, so displayed depth differs between brokers. It remains useful for fast order placement and for spotting thin conditions around news, and it should not be read as the whole market's book.
Can you trust large orders shown on the ladder?
Not on their own. Displayed size can be withdrawn instantly, and hidden or iceberg orders mean a small displayed quantity can absorb far more. A level only carries information once price has reached it and the size has either held or disappeared.
About the Author
Alex Onta is an Executive Director at SINGUARD. He built eTrader, the terminal, the mobile apps, eTrader Broker, Copytrading, Business and Community, along with the worldwide clustered-server infrastructure it all runs on, with his brother Roman Onta helping on the design, and he leads that division today. Together with Roman he builds the Prop Firm CRM, the Broker CRM, Scalegram and CopySignals, and the two of them carry worldwide compliance, payment processing and international business structuring side by side. He lives and works in Dubai for most of the year. Meet the executive duo leading Singuard's five divisions.