NinjaTrader SuperDOM: Reading the Order Book and Time and Sales

Many traders open the SuperDOM only to click buy and sell. It's also a live view of two different things: displayed limit orders waiting at each price, and trades that have already executed. Reading them together tells you something about how price is moving, but only if you're clear about what each one leaves out.

What the window shows

The ladder (depth of market): the visible resting limit orders on each side. Bids sit below the market and asks sit above, with the contract quantity at each price. Whether you see depth, and how many levels, depends on your data feed and its subscription.

Time and sales: every executed trade with price, size and whether it hit the bid or lifted the ask. This is what happened, not what someone intends.

Position and P&L: your current position, average price, open profit or loss and order controls.

The ladder tells you what's displayed. The tape tells you what traded. They can disagree, and the disagreement is often the interesting part.

Reading the ladder carefully

A large resting bid looks like support, but it's only a displayed order. Orders can be canceled at any time. Watch what happens as price approaches: if trades hit the bid and the size gets used up, someone was willing to buy there. If the order shrinks or disappears before price touches it, it provided no support at all. Don't trade on a displayed size alone.

Imbalance: more size on the bid than the ask at nearby prices suggests more passive buying interest. It's a weak signal because displayed size can be pulled, and it's easy to over-read.

Thinning: when size drops on both sides, liquidity is withdrawing. That can precede a fast move, and it means a market order may fill several ticks away from where you clicked.

Iceberg orders show only part of their size. One sign is a price that keeps reloading with similar quantity after repeated trades at it. The ladder can't prove it, but the tape plus a level that refuses to break can make it plausible.

Reading time and sales

• Trade size: a stream of small prints and a few big ones tell different stories. Size alone doesn't identify who is trading, so I don't label large prints as institutional.
• Side coloring: if most prints at a level are at the ask while price doesn't rise, sellers may be absorbing the buying. If prints are mostly at the bid and price stays up, buyers may be absorbing selling. Both are inferences to confirm with price.
• Speed: a tape that speeds up as price crosses a level shows increased activity. It doesn't tell you the move will hold.

You can filter the Time and Sales window to hide small prints. Choose a minimum size relative to the contract's typical print size, and check the settings against the help guide, because labels differ between versions.

Spoofing and what to ignore

Placing orders with the intent to cancel them before they execute is illegal in the US futures markets under the Commodity Exchange Act, which Dodd-Frank amended. You can't tell intent from the screen, so don't try to label anyone a spoofer. The practical lesson is simpler: a large order that vanishes as price approaches wasn't support, whatever the reason, and you shouldn't put money on it.

Placing orders from the SuperDOM

Orders on the SuperDOM are placed by clicking, and a mis-click sends a real order if you're on a live account. Confirm which account is selected before the session, practice on SIM first, and keep in mind that SIM doesn't recreate live fills or the feel of risking money.

ATM strategies. An ATM (Advanced Trade Management) strategy template can place a stop and target when the entry fills and then manage them. You can edit these orders afterward, so the discipline of not moving a stop still has to come from you. See the NinjaTrader 8 help guide for the current ATM settings.

Slippage. The open and big news releases thin the book and widen spreads, so market orders can fill worse than expected. One ES tick is $12.50. Three ticks of slippage on a 4 contract market entry is 3 x $12.50 x 4 = $150 before commissions (hypothetical numbers). Use limit orders when you can, accept that they may not fill, and include realistic slippage in your plan. Stop orders can slip the same way.

Setting up the window

The SuperDOM properties let you choose which columns are shown, such as volume at price, and how many rows are visible. A setup many traders find workable is enough rows to see nearby depth without clutter, a volume column to see where trading has occurred, and the account and ATM template selected before the session. Which columns exist depends on your version and data subscription, so check the properties dialog and the help guide rather than relying on a fixed list.

A confirmation tool, not a signal

The SuperDOM doesn't tell you what to trade. You still need a reason for the trade from your own plan, for example price reaching a KPL reference level after the regular-session open, or a VWAP test. Those levels are fixed prices anchored to the opening print and are separate from anything on the ladder. The window helps with timing: is the level being traded through or defended, and is the market thin enough that a market order will be expensive? It won't tell you who's trading or where price will go next, and a good look at the book doesn't make a trade an edge.