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The desk map: three tools, one job

PLAT1.01OrientationFoundationDefinition≈ 12 min

Learning objectives

  • Name what ATAS X, Vexity and the pre-market brief are each the single source of, and what TopstepX is the record of.
  • Apply the one-source rule: before you use a number, write down its source, scope and time stamp.
  • Explain why one level name, such as a call wall or a gamma flip, can sit at different prices on different screens.
  • Place each tool in the desk's one job: measure the day, decide how and how big, mark where to read order flow, score yourself against a placebo.

Suppose it is Monday morning at 08:40 ET (20:40 ICT). You are writing your NQ plan on a synthetic morning and look up one option number, the call wall on the NQ axis, across four screens on your desk. One says 29,250, another 28,900, a third 29,500, and a fourth 30,000 — up to 1,100 NQ points apart.

Which one is “the” wall? The answer is a habit, not a number: every number on your screens has one source, one scope and one time stamp, and your plan quotes exactly one of them.

Key terms

Desk map (bản đồ bàn giao dịch): the list of which tool is the source of which kind of number on your desk Definition.

Single source (nguồn duy nhất): the one tool a number is quoted from. Any other screen that shows the same thing is a display copy (bản hiển thị): useful to look at, never quoted House rule.

Scope (phạm vi dữ liệu): what the number was computed from: which option chain (NDX index options, QQQ, or CME’s options on NQ futures), which expiries (all of them, or only today’s, called 0DTE), and which book (open interest or today’s volume) Definition.

Time stamp (mốc thời gian): when the data behind the number was taken, as opposed to when you are looking at it Definition. PLAT1.02 covers when each tool’s data is live, frozen or stale.

Terms you need: gamma flip and call wall. Both are outputs of an options model, not prices the market has agreed on Model. A gamma flip is the price where a model says option dealers’ hedging changes direction (OPF6.02). A call wall is the strike with the largest call-option exposure (OPF6.03). Reading walls as support or resistance is Lore; this lesson only asks where the number came from.

Chart first: one name, four prices

ANIMATED FIGURE

The call wall on four screens

House rule
The call wall on four screens — Interactive figure
0%
WHAT TO SEEStep through. Four screens each show a call wall for NQ, at four prices up to 1,100 points apart. Each is tagged with its source, scope and time stamp; three turn out to be display copies with another scope or an older stamp and fade, and the brief quotes the one that is left. Synthetic prices; the size of the spread is in line with what happens across real option books and scopes.

Synthetic data

How it works

Three tools, three jobs

On this desk each kind of number has one home House rule:

  • ATAS X is the futures tape and the auction. Source of NQ and ES prices, every trade and its side, footprint, delta, the order book, and the auction references built from your own feed (prior day’s high, low and settlement, value area, overnight range). The academy’s OrderflowSuite studies draw on the ATAS chart; stock ATAS tools do the same jobs without it (PLAT1.03).
  • Vexity is option context on the futures axis. Source of the implied move, gamma sign, model levels such as flips and walls, and option flow. Each is a model output from an option chain, projected onto NQ or ES points Model. It is never a second auction engine.
  • The pre-market brief is the plan and the record. Source of every number you write down, each copied with source, scope, time stamp, freshness and grade next to your if-then scenarios, and scored after the close.

TopstepX sits outside the analysis: this desk places Topstep orders there while ATAS X stays the read-only order-flow screen House rule. It is the record of your orders, fills, balance and loss limits (PLAT2.08).

One number, one source

Kind of number Single source Display copies
Auction references (prior day, overnight range, value area) ATAS X, from your feed suite or stock studies on other charts
Trades, delta, big prints, order book ATAS X none; leave web-chart order-flow studies off
Option levels (flips, walls) and gamma sign Vexity, with its scope written next to it ATAS plugin, Options Regime card, web overlays
Implied move one stated volatility source per instrument suite Implied Range, card σ bands
Your fills and account limits TopstepX none

Why one name shows several prices

Four things change a number while its name stays the same:

  1. Chain. NDX index options and CME’s options on NQ futures are different markets; a flip from each is a different model run.
  2. Expiries. A level from today’s options only can sit far from one built from every expiry.
  3. Time. Index and ETF option data freezes from 16:15 to 09:30 ET, so a screen can show yesterday’s value all morning (PLAT1.02).
  4. Formula. The suite’s Implied Range can take its volatility from the options bridge, a manual value or realised volatility, scaled by 252 or 365 days: different ranges under one name.

None of this is a fault until you mix them without saying so.

The one job the tools serve

The desk’s job is a chain: measure the day, decide how and how big to trade it, mark a few areas where you will read order flow with an if-then and an invalidation, then score yourself against a placebo. The measured parts are rulers: the implied move for the day’s range MeasuredNasdaq index (OPF4.03) and gamma sign as a width regime PlausibleNasdaq index (REG3.01). Pre-market levels alone touched and held no more often than random levels at the same distance Measured: no edgeNasdaq index (DESK2.01). Each tool feeds one step; none is a trade signal on its own.

Myth / hypothesis: “When three screens show a level near the same price, the level is stronger.” Two display copies of one model run are the same data counted twice. And when our lab tested genuine confluence of pre-market levels against random levels, it added nothing Lore. Treat agreement between screens as a data check, not as evidence.

What the data says

Worked example: writing a model level into the brief

Suppose it is Monday at 09:41 ET (21:41 ICT) on the synthetic morning from Figure 1; index option data is now live.

  1. Pick the source. On this desk the brief quotes Vexity’s all-expiries NDX + QQQ read on the NQ axis House rule: call wall 29,250 (synthetic illustration).
  2. Write the tags. Call wall 29,250 · Vexity · NDX + QQQ, all expiries, NQ axis · 09:41 ET · live · Model.
  3. Handle the other numbers. The 0DTE-only plugin read (28,900) and the NQ futures-option overlay (30,000) are different model runs on different scopes: leave them out or give each its own tagged line. Never average them, and never quote whichever sits nearer to price.
  4. Write “none” when there is none. When a chain has no zero-crossing flip (exposure of one sign at every strike), write none; do not borrow one from another screen.
  5. Re-stamp when frozen data goes live. If you wrote a frozen Friday value at 08:40 ET, your 09:45 ET re-check replaces it with the live value and its new stamp (PLAT6.02).

Auction numbers get the same treatment: “prior settlement” comes from the ATAS sheet, while a web chart’s “prior close” may be the last trade of the day session, a different price.

The failure

One source can still be stale: a carefully tagged Friday value is still a Friday value. And one source does not make a number right; it makes it traceable, so you can score it after the close.

Do it on the platform

Prop-firm note. Your loss limits and fills live in TopstepX, on the firm’s data. If ATAS X and TopstepX show slightly different prices or P&L, the firm’s screen decides your account (PLAT2.08, PROP1.01).

Common mistakes

Common mistake: Treating two screens that agree as confirmation. Two copies of one model run are one number counted twice, and even independent levels lining up added nothing against placebo.

Common mistake: Quoting a frozen number as current. A Friday value on a Monday plan is fine only with its stamp beside it, replaced after the open.

Drill: map your own desk

On your own workspace, with no live trading:

  1. List every number and line on your NQ chart and option screens.
  2. For each one, write the tool, the scope and the time stamp.
  3. Mark any number that appears on more than one screen, and pick its single source.
  4. Hide or label every display copy.
Solution

A first audit usually finds duplicates: a prior-day line drawn by two studies, an option level on both a plugin and a card, an implied range from a different volatility source than your plan. Keep one source for each and add it to your brief template as name · tool · scope · stamp. If you cannot fill in the scope or stamp, do not quote the number.

Recap

  • ATAS X: futures prices, trades, order flow, auction references. Vexity: option context, all model outputs. The brief: every number you write down. TopstepX: your fills and limits.
  • One number, one source, quoted with its scope and time stamp; other screens are display copies.
  • One name can carry several prices because chain, expiries, time and formula differ across screens.
  • The tools serve one job: measure the day, decide how and how big, mark where to read order flow, score against a placebo.
Check yourself3 questions
  1. 1You need the prior day's settlement for NQ. Which tool is its single source on this desk?

    Choose one answer.

  2. 2On a synthetic morning, two screens show the NQ call wall at 29,250 (NDX + QQQ, all expiries) and 30,000 (NQ futures options). What do you write in the brief?

    Choose one answer.

  3. 3Sort each statement.

    Put each statement in its bin.

Further reading

  • CME Group, Nasdaq-100 futures contract specifications, cmegroup.com: tick size, trading hours and settlement for NQ.
  • Cboe, VXN index methodology, cboe.com: what the Nasdaq-100 volatility index measures.
  • Our lab: a source-by-source inventory of the option chains and scopes the desk uses.
  • Our lab: the test of pre-market levels and their confluence against random levels at the same distance (taught in DESK2.01).

Prerequisites: M0.07 Choosing software & data · Next: PLAT1.02 Clocks: when each tool’s data is live. Every tag you just learned to write includes a time stamp, and the next lesson shows when each tool’s data is live, frozen or stale.

Educational content only. Not financial advice. Futures trading involves substantial risk of loss.

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Not financial advice. Educational content only. Futures trading involves substantial risk of loss.