THE LEXICON · THE DEALING RANGE
The dealing range
The dealing range is the high and the low the overnight session prints between 18:45 and 22:03 ET. Once that window closes the two prices are fixed, and every range-derived level the session uses is measured from them.
The window and its two prices
A dealing range is defined by a clock, not by a pattern. The window opens at 18:45 ET and closes at 22:03 ET. Whatever the overnight session trades during those hours produces one high and one low, and those two prices are the range. There is no judgment in the construction — no smoothing, no discretion about which wick counts. When the window closes the range is fixed for the session and does not move again, whatever price does afterward.
Two numbers is the whole object. Every range-derived level the method uses for the session is measured from that high and that low. Beside them stands the key open, stamped at 18:00, which is not part of the range but sits in the same frame. The range says where business was done. The open says where the session began. They are read together, and they are read as measurements rather than as instructions.
Why a fixed window
Structure that keeps redrawing itself cannot be tested and cannot be worked against. A window with a start and an end forces the range to be finished before it is used, which means the levels on the panel at the cash open are the same levels published hours earlier. Nothing is revised into a better shape after the fact. The cost of that discipline is real: the window can close on a narrow range or a violent one, and the range is still the range.
The hours themselves matter because the overnight session is where the first honest structure of the trading night appears — continuous trade, real participation and no cash open to overwhelm it. That does not make the range important. It makes it early, defined and available before the day starts, which is a smaller and more durable claim.
What the range does not tell you
A range carries no direction. The high and the low describe where trade occurred inside a window that has already ended, and nothing in the construction says which side matters next or whether either price is touched again. Read as a forecast it fails immediately, because it was never a forecast. A range is a map of where business was done, not a prediction of where it will be done next.
It carries no obligation either. Price is not required to respect the edges, hold a midpoint or reach the far end. Every measurement drawn from the range is a measurement of that range, not a property of the market, and levels built on a different window, a different instrument or a different session convention will not agree with these. None of them is the true one. The numbers are model-dependent, and they should be stated that way.
How the desk reads it
On the terminal the range lives in THE LEVELS panel, drawn to scale, published on the first pass after the 22:03 ET close and archived afterward on THE PRINTS. Publishing on a schedule rather than on conviction is deliberate. The range is a record, and a record that arrives late or gets adjusted is not a record. The archive exists so a session can be checked against what was actually published rather than against what is remembered.
In practice a working desk treats the two prices as a frame for attention. Where price sits relative to the range and to the 18:00 open is context, a starting point for reading the session rather than a signal produced by it. Recognition, not prediction. The range does not say what to do inside it, and deciding that is the whole job.
How it gets misread
The common error is quiet: the range gets extended. Price runs past the high hours after the close, the new extreme looks more meaningful and the range is redrawn to include it. That produces a different range every hour, fit to whatever already happened, and nothing measured from it can be checked against anything. The second error follows the first, treating the edges as levels that must hold rather than as the boundary of a window that has closed. Both swap a fixed record for an opinion.
Where it lives
Several other levels on the terminal begin at this range, and these terms sit closest to it.
THE DESK PUBLISHES THE NQ DEALING RANGE AT 22:03 ET, BEFORE THE SESSION — AND SCORES IT AFTER, EITHER WAY. SEE THE RECORD → · AUDIT THE CHAIN →