Why gamma levels can disagree

Put two gamma dashboards side by side and you may get two different call walls for the same symbol. One might mark a strike just above spot. The other might mark a higher strike and place the gamma flip on the opposite side of the market. It is tempting to ask which screen is broken. Often both are doing exactly what their models specify.

A level is an estimate, not a field delivered by an exchange. To understand a disagreement, compare the underlying, observation time, expiry window, and what each provider says its labels mean.

The first fork: what counts as dealer exposure?

An option chain reports open interest and quotes. Open interest counts outstanding contracts; it does not identify the customer, the dealer, or which side either party holds. Providers interpret that incomplete picture differently, so their profiles need not agree.

Even the word wall can hide a definition. One screen may choose the strike with the largest call gamma. Another may rank net gamma, absolute gamma, or a proprietary positioning estimate. Those are different questions. Compare the legend and methodology before comparing the lines.

The differences are visible in platform documentation. SpotGamma describes Zero Gamma and its Volatility Trigger as separate levels. MenthorQ ranks additional GEX levels alongside its larger support and resistance areas. When comparing a SteadyTrader gamma flip with another provider’s level, first check that the charts cover the same underlying and expiry window.

The second fork: inputs that move during the day

Gamma depends on the underlying price, implied volatility, time to expiry, and the pricing assumptions used for the contract. A near-the-money option that is quiet in the morning can become the largest contribution after a price move. Near expiry, that sensitivity changes particularly fast. A screen updated at 10:05 and one updated at 10:20 may describe different market states.

A recent chart timestamp does not mean every piece of public market information updates at the same pace. Official open interest is published after clearing. Keep that timing difference in mind when comparing an intraday picture with a prior session.

Contract selection changes the map

Suppose one chart covers every listed expiry while another shows only today and the next weekly expiry. A heavy monthly position may stand out on the first chart while same-day trading draws attention on the second. Check the stated scope before comparing their peaks.

Scaling matters when people compare SPX and SPY charts. Contracts have different underlyings and notionals. A raw count of contracts cannot be laid over another product as if one unit meant the same amount of risk. Ask whether the chart shows shares, dollars per point, dollars per one percent move, or an indexed score.

A useful comparison routine

Set the same symbol, expiry window, and observation time. Check the unit on the vertical axis and how each provider defines a wall or flip. Then compare broad concentrations before arguing over a single strike. If both profiles show large nearby exposure but disagree by one strike, they may be telling a similar story at different resolution.

When they disagree sharply, treat the disagreement as a reason to lower confidence. Watch how price and liquidity behave near the proposed levels. A model can tell you where to pay attention; the traded market tells you whether that location matters today.

What to take from the comparison

SteadyTrader’s levels are estimates. They do not verify dealer inventory or promise that hedging will defend a strike. The profile is most useful beside current price behavior: a level gives you somewhere to watch, and the market shows you how it responds.