DOM

What it is

DOM stands for Depth of Market — the visible ladder of resting bid and ask orders around the inside spread. A typical DOM display shows price levels stacked vertically, with the current best bid and best ask at the centre, and resting size on each side fanned out above and below. Each row represents one tick of price and contains the cumulative resting quantity at that price.

DOM and market depth refer to the same underlying data — resting passive liquidity — but DOM specifically refers to the interactive ladder display, the panel where traders both read the order book and enter orders against it. It's where execution happens.

The reason DOM exists as a dedicated interface is that the order book changes too fast and contains too much information to consume effectively from a chart alone. A vertical ladder oriented around the inside market is the densest possible way to display it.

Why it matters

DOM does two jobs at once: it tells you what resting liquidity is available right now, and it gives you the click surface to send orders against that liquidity. For active intraday futures traders, the DOM is often the primary execution interface.

Practical reads:

• Asymmetric depth — significantly more resting size on one side than the other — provides a directional bias for the next few seconds to minutes.
• Walls that hold (large resting size that doesn't disappear when price approaches) act as short-term resistance / support.
• Walls that pull as price approaches are a known liquidity provision pattern that tends to precede a fast move through the void.
• Sudden depth refills after the level gets hit signal passive defense — a candidate absorption read.

How traders use it on Sierra Chart

Sierra Chart provides a configurable DOM panel that can be displayed standalone or attached to a chart. The panel supports custom column layouts (price, bid size, ask size, bid volume, ask volume, custom user-defined columns), one-click trading with bracket orders, and direct integration with the platform's order routing and risk-management features.

Depth data is also exposed to ACSIL, which means custom studies can read the same order book and turn it into charts, alerts, or analytics. Depth heatmaps, depth-difference plots, and persistent-size monitors are common ACSIL-side use cases.

Many discretionary traders run the DOM as their main click-trading interface alongside a price chart and a footprint chart, treating it as both the read and the write surface for active trading.

Common patterns / pitfalls

• The DOM ladder updates many times per second. Trying to track every change with your eyes is a losing strategy; rely on visual cues (heatmaps, persistent-size highlights) for context.
• Iceberg orders are invisible to the raw DOM. Visible size that gets hit repeatedly without disappearing is often a hidden larger order.
• DOM-based reads are most reliable in liquid contracts during cash hours. Overnight DOM in thin futures is mostly noise.
• One-click trading from the DOM is fast — and unforgiving. Most platforms allow a confirmation layer; if you're new, keep it on until your hands match your intent.

Related SCS studies

Market Depth Manager builds on Sierra Chart's depth data to provide additional on-chart and panel views for monitoring DOM structure over time without staring at the raw ladder continuously.