SPX vs NDX Gamma: Same Map, Different Pace

Both indices run on the same dealer-hedging mechanism, but NDX's mega-cap tech concentration gives it wider walls and sharper flip breaks than SPX — here's what changes.

SPX and NDX are read with the same gamma tools — call and put walls, the HVL / gamma flip, and magnets — but they behave differently because the Nasdaq-100 is more concentrated and higher-beta than the S&P 500, which tends to make NDX's levels wider apart and its flip breaks sharper. If you already trade ES with gamma levels, the single most useful thing to understand before you touch NQ is that the map is the same and the personality is not. Copy-pasting SPX habits onto NDX is where many traders get the sizing and the expectations wrong.

What's identical

The mechanism is the same for both indices: dealers hedge their options positioning, net-long gamma dampens moves, net-short gamma amplifies them, and walls, the flip and magnets mark where that hedging concentrates. Everything in the concept guide gamma walls, GEX magnets and the HVL flip explained applies to NDX exactly as it does to SPX. That shared foundation is why one framework covers both, and why the daily Gamma Axis report publishes levels for SPX/ES and NDX/NQ side by side.

What's different: concentration and beta

The Nasdaq-100 is dominated by a small group of mega-cap technology stocks, so single-name moves can swing the whole index harder than they would the broader, more diversified S&P 500 — and that higher beta shows up directly in the gamma map. In practice, NDX levels tend to sit further apart in points, the index tends to travel further between walls, and a cross of the gamma flip often triggers a faster, more decisive regime change than the same event on SPX. None of this changes what a wall or a flip means; it changes how much room to give it and how quickly a break can run.

What this changes in practice

Because NQ moves further and faster — a larger daily range in points — the same gamma plan needs smaller position sizing, wider zone-based stops, and a little more patience for confirmation at a level. It is worth being precise about the arithmetic: each NQ point is worth $20 versus $50 on ES, but NQ travels so many more points that the dollar swing on a typical move is still larger, which is why ES-sized positions tend to be too big on NQ. A wall touch that would be a crisp fade on ES can overshoot on NQ before reversing, so treating NDX walls as zones rather than precise lines is essential, and the flip's fade-versus-trend switch tends to be more violent on NQ, rewarding traders who wait for the cross to confirm.

Trade each with its own framework

The cleanest way to use this comparison is to keep two playbooks that share one method. For the S&P side, follow how to trade SPX / ES with gamma levels; for the Nasdaq side, follow how to trade NDX / NQ with gamma levels, which bakes in the risk scaling NQ demands. You can compare today's SPX and NDX maps in the free daily Gamma Axis levels; the €19.90/mo Supporter plan delivers both before the open with the auto-updating indicator.

FAQ

Is NDX harder to trade than SPX?

Not harder, but faster. The same gamma framework applies; NDX's higher beta simply means bigger, quicker moves, which raises the importance of sizing and stop placement.

Can I use the same gamma levels for both?

No — use SPX levels for SPX/ES and NDX levels for NDX/NQ. They are separate indices with separate positioning, so each has its own daily map.

Why do NDX walls sit further apart?

The Nasdaq-100's higher index level and volatility spread its strikes and reaction zones over a wider range of points than the S&P 500's, so NDX levels naturally appear further apart.