Product2026-07-308 min read

GEX Flow Evidence: Read Session Flow at Mapped Walls

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TradingFlow’s Session flow at mapped walls places same-session options flow beside canonical Call and Put GEX Walls, with transparent Flow-aligned, Flow-against, and Mixed flow verdicts.

#GEX #options flow #gamma exposure #call wall #put wall #Net DEX #Rank Symbols

A GEX wall tells you where options structure is concentrated. Options flow tells you what traded during the session. Those are related views, but they are not the same evidence.

TradingFlow’s Session flow at mapped walls feature brings them together without pretending they have the same time horizon. It places the selected session’s exact-strike flow beside the canonical Call GEX Wall and Put GEX Wall, then applies a small, visible sign rule:

Flow-aligned — observed flow points in the conventional direction associated with that wall.
Flow-against — observed flow points the other way.
Mixed flow — Net DEX is zero, or trustworthy premium direction conflicts with Net DEX.

This is a comparison, not a prediction. It does not claim that a wall will hold, break, attract price, or reveal dealer intent.

Annotated TradingFlow GEX Flow Evidence view showing expiry scope, the selected-scope GEX map, alignment verdicts, wall evidence, and the transparent status explanation

A real SPY session in TradingFlow, annotated in the order traders can inspect it: scope → structure map → verdict → wall evidence → rationale. Session values change as new snapshots become available.

Why combine GEX and flow?

GEX and flow answer different questions:

Evidence	Question it answers	Time horizon
Full-chain GEX	Where is gamma structure concentrated?	Structural snapshot
Session Net DEX	Which way did same-session directional flow lean?	Current trading session
Directional premium	How much bullish, bearish, and neutral premium traded?	Current trading session
OI change	How did open interest change versus the comparable prior snapshot?	Separately dated structural comparison

A Call Wall can be structurally important even when nothing traded there today. Heavy flow can appear at a strike that is not a canonical wall. The useful question is therefore not “Which number wins?” It is:

Is today’s observed flow at the exact wall strike aligned with, against, or inconclusive beside the structural map?

That framing helps traders avoid two common mistakes: treating every large GEX level as an automatic trade signal, and treating same-session flow as proof of dealer inventory.

What TradingFlow matches

The feature does not compare a wall with every nearby option. It uses a deliberately narrow join:

Select a GEX scope: All expirations, 0DTE, Weekly (1–7 days), or Monthly (8–31 days).
Read the canonical Call Wall and Put Wall from that same full-chain scope.
Match flow at the exact normalized strike.
Use CALL contracts only at the Call Wall and PUT contracts only at the Put Wall.
Classify only when flow and structure identify the same effective session and the structure build time is available.

The strict matching matters. A nearby strike is not silently substituted. A call row is not used to explain a Put Wall. One expiry scope does not borrow evidence from another.

How the verdict works

There is no composite score and no hidden confidence model.

Wall	Flow-aligned	Flow-against
Call GEX Wall	Negative CALL Net DEX	Positive CALL Net DEX
Put GEX Wall	Positive PUT Net DEX	Negative PUT Net DEX

If Net DEX is exactly zero, the result is Mixed flow.

Directional premium can change a verdict to Mixed flow only when TradingFlow has exact, valid bullish, bearish, and neutral premium legs and their direction conflicts with Net DEX. Reconstructed or unavailable premium remains visible as provenance, but it does not overrule the status.

This rule is intentionally simple enough to audit from the numbers on screen.

A concrete example

Assume SPY is trading at $555 and the selected scope identifies:

Put GEX Wall: $550
Call GEX Wall: $560

At the $560 Call Wall, the same-session CALL contracts produce:

Net DEX: −38K
Bearish premium: $12M
Bullish premium: $3M
Observed prints: 184

The result is Flow-aligned. Negative CALL Net DEX satisfies the transparent Call Wall sign rule, and the exact premium split points in the same direction.

What does that mean? It means the session’s observed call-side flow at $560 carried negative directional pressure beside a structurally concentrated call strike.

What does it not mean?

It does not prove traders opened new bearish positions.
It does not prove dealers are short or long a particular inventory.
It does not guarantee $560 will act as resistance.
It does not assign a probability that price will reject the level.

The phrase “negative flow at the Call Wall” also does not mean one trader deliberately “put negative flow on the wall.” Net DEX is an aggregate of inferred trade direction across matching prints. Call selling, closing long calls, spreads, and other activity can contribute. The feature describes the tape; it does not claim to know each participant’s intention.

Now assume the $550 Put Wall shows +21K PUT Net DEX, with $7M bullish premium versus $2M bearish premium. That is also Flow-aligned under the Put Wall rule. If PUT Net DEX were negative instead, it would be Flow-against.

Read the map before the badge

After you select Load flow evidence, the feature opens with a chart-first view:

Put Wall, structure Spot, and Call Wall arranged by price.
Selected-scope Call and Put GEX by strike.
Net DEX and evidence status beside each wall.
Separate flow-session, structure-session, and structure-build provenance.

The badge is only the summary. The audit cards below it provide the evidence:

Wall role, strike, and distance from structure Spot.
Wall-side share of selected-scope gross GEX.
Same-side Net DEX.
Exact, reconstructed, or unavailable premium provenance.
Matched expirations and contracts.
Traded contracts and print count.
Covered OI change and its comparison coverage.

Use Why this status? to see the exact rule applied to the wall.

Missing evidence is not zero

TradingFlow keeps several states separate because they mean different things:

Wall unavailable — the selected GEX scope has no canonical wall for that side.
No matching contracts — the wall exists, but the session snapshot has no same-side contracts at the exact strike.
No observed flow — matching contracts exist, but their summed print count is zero.
Geometry not classified — the wall is on an unconventional side of Spot, or a valid Spot reference is unavailable.
Session mismatch — flow and structure do not describe the same session.
Source unavailable — one of the required datasets did not load.

The interface does not turn missing evidence into a numeric zero or force a bullish/bearish label when the comparison is unsafe.

How to open GEX Flow Evidence

You can begin from either Rank view:

From Rank Contracts

Open Rank → Contracts.
Find a contract worth investigating.
Select Open symbol flow at GEX walls in the Inspect column.
TradingFlow opens the underlying symbol drawer on Flow while keeping your Contracts filters, sorter, and page intact.

From Rank Symbols

Open Rank → Symbols.
Open a symbol’s inspection drawer.
Select the Flow tab.

Flow Evidence is a paid, user-initiated load. An entitled user selects Load flow evidence before the wall comparison or its values are fetched. Consent is tied to the current symbol and resets when the symbol changes or the drawer closes.

After loading:

Confirm that the flow session and structure session match.
Choose All, 0DTE, Weekly, or Monthly.
Read the GEX profile and Spot/wall geometry.
Compare the two wall statuses.
Open the audit cards and check Net DEX, premium provenance, print count, and OI coverage.
Use View GEX map for the wider structural read.
Expand the separate 30-session flow history only when you need symbol-wide context.

A practical trading workflow

Treat the feature as an evidence checkpoint between structure and execution:

Step	TradingFlow surface	Question
Map	GEX tab	Where are the selected-scope structural levels relative to Spot?
Compare	Flow tab	Is same-session exact-strike flow aligned, against, mixed, or unavailable?
Audit	Wall evidence cards	How many contracts and prints support the status? Is premium exact? Is OI coverage usable?
Validate	Option Trades	Are recent prints and price action confirming the same read?
Plan risk	Your execution chart	Where is the setup invalidated if price does something different?

GEX Flow Evidence should narrow your questions, not make the decision for you. A Flow-aligned Call Wall can still break. A Flow-against Put Wall can still hold. Price, liquidity, news, volatility, and changing intraday flow remain part of the trade.

What the feature intentionally does not do

It does not rank walls.
It does not calculate a 0–100 confidence score.
It does not label a wall as a guaranteed target, magnet, support, or resistance.
It does not infer dealer inventory from Net DEX.
It does not treat OI change as proof of opening or closing.
It does not manufacture a classification when sessions or provenance disagree.

That restraint is part of the product. GEX is the structural map; flow is the observed session tape. TradingFlow shows where they agree and where they do not, while keeping the evidence auditable.

Open the workflow

Open SPY Flow Evidence in TradingFlow

For the underlying concepts, read:

This feature is an analytical research tool, not investment advice or a mechanical trading signal.

GEX 关键位告诉你期权结构集中在哪里，期权资金流告诉你本交易日实际成交了什么。两者相关，但并不是同一种证据。

TradingFlow 的 Session flow at mapped walls 功能将两者放在同一张可审计的证据图上：把所选交易日、精确行权价的资金流与标准 Call GEX Wall、Put GEX Wall 对照，再应用一条简单、可见的方向规则：

Flow-aligned（资金流一致）：观察到的资金流方向与该墙的约定方向一致。
Flow-against（资金流相反）：观察到的资金流方向相反。
Mixed flow（混合资金流）：Net DEX 为零，或可靠的权利金方向与 Net DEX 冲突。

这是一项证据对照，不是价格预测。它不会宣称某道墙一定守住、突破、吸引价格，也不会声称知道做市商的真实意图。

TradingFlow GEX Flow Evidence 标注截图，展示到期范围、所选范围 GEX 图、资金流状态、墙位证据以及透明的状态解释

TradingFlow 中真实的 SPY 交易日数据，按交易者的查看顺序标注：范围 → 结构图 → 状态 → 墙位证据 → 判定依据。新快照生成后，交易日与数值也会随之更新。

为什么把 GEX 与资金流放在一起？

GEX 与资金流回答的是不同问题：

证据	回答的问题	时间范围
全链 GEX	Gamma 结构集中在哪里？	结构快照
本交易日 Net DEX	当日方向性资金流偏向哪边？	当前交易日
方向性权利金	多头、空头与中性权利金分别成交多少？	当前交易日
OI 变化	相较可比的上一份快照，未平仓量如何变化？	单独计时的结构比较

Call Wall 即使当天没有成交，也可能具有结构意义；大量资金流也可能发生在并非标准墙的行权价。因此，真正有用的问题不是「哪一个数字更重要」，而是：

当天在精确墙位上的资金流，与结构图一致、相反，还是证据不足？

这种方式能避免两个常见错误：把每个大型 GEX 关键位当成自动交易信号，以及把当日资金流误读成做市商持仓证明。

TradingFlow 如何匹配证据

该功能不会用墙附近的任意合约做模糊解释，而是采用严格连接：

选择 GEX 范围：全部到期日、0DTE、周度（1–7 天） 或 月度（8–31 天）。
从同一全链范围读取标准 Call Wall 与 Put Wall。
只匹配精确标准化行权价。
Call Wall 只使用 CALL 合约，Put Wall 只使用 PUT 合约。
只有当资金流与结构属于同一有效交易日，且结构构建时间可用时才进行分类。

附近行权价不会被静默替代；CALL 行不会用于解释 Put Wall；不同到期范围之间也不会互相借用证据。

状态如何计算

这里没有综合评分，也没有隐藏的置信度模型。

墙位	Flow-aligned	Flow-against
Call GEX Wall	CALL Net DEX 为负	CALL Net DEX 为正
Put GEX Wall	PUT Net DEX 为正	PUT Net DEX 为负

如果 Net DEX 恰好为零，结果为 Mixed flow。

只有当 TradingFlow 拥有精确、有效的多头、空头与中性权利金分项，且其方向与 Net DEX 冲突时，权利金才会把状态改为 Mixed flow。重建估算或不可用的权利金会保留来源说明，但不会覆盖状态。

规则足够简单，因此用户可以直接从屏幕上的数字复核。

一个具体例子

假设 SPY 现价为 $555，所选范围给出：

Put GEX Wall：$550
Call GEX Wall：$560

$560 Call Wall 上，同一交易日的 CALL 合约汇总为：

Net DEX：−38K
空头权利金：$12M
多头权利金：$3M
观察到的成交笔数：184

结果为 Flow-aligned。负 CALL Net DEX 满足透明的 Call Wall 符号规则，精确权利金分布也指向同一方向。

它表示：本交易日 $560 行权价上的看涨期权资金流呈现负向方向压力，而这里同时也是 Call GEX 结构集中的位置。

它不表示：

不能证明交易者一定开了新的空头仓位。
不能证明做市商持有某种确定的多空库存。
不能保证 $560 一定构成阻力。
不会给出价格回落概率。

「Call Wall 上出现负资金流」也不代表某一个交易者主动把“负资金流放在墙上”。Net DEX 是对匹配成交的推断方向进行汇总。卖出看涨、平掉多头看涨、价差组合与其他交易都可能产生影响。该功能描述成交带，不声称知道每个参与者的意图。

再假设 $550 Put Wall 显示 +21K PUT Net DEX，多头权利金为 $7M，空头权利金为 $2M。按照 Put Wall 规则，这也是 Flow-aligned。如果 PUT Net DEX 为负，则是 Flow-against。

先看图，再看状态标签

选择 Load flow evidence 后，功能首先展示以图表为主的视图：

按价格排列 Put Wall、结构 Spot 与 Call Wall。
所选范围内按行权价拆分的 Call / Put GEX。
每道墙旁的 Net DEX 与证据状态。
分开的资金流交易日、结构交易日与结构构建时间。

状态标签只是摘要，下方审计卡片提供完整证据：

墙位角色、行权价以及相对结构 Spot 的距离。
该墙占所选范围总 GEX 的比例。
同一侧合约的 Net DEX。
精确、重建估算或不可用的权利金来源。
匹配的到期日与合约数量。
有成交的合约与成交笔数。
OI 变化及其可比覆盖率。

点击 Why this status? 可以查看该墙实际应用的规则。

缺失证据不等于零

TradingFlow 会区分以下状态，因为它们代表不同情况：

Wall unavailable：所选 GEX 范围内没有该侧标准墙。
No matching contracts：墙存在，但交易日快照中没有精确行权价、同一侧的匹配合约。
No observed flow：匹配合约存在，但汇总成交笔数为零。
Geometry not classified：墙位于 Spot 的非常规一侧，或缺少有效 Spot 参考。
Session mismatch：资金流与结构不属于同一交易日。
Source unavailable：所需数据源之一未成功加载。

界面不会把缺失证据伪装成数值零，也不会在比较条件不安全时强制给出多空标签。

如何打开 GEX Flow Evidence

你可以从任一 Rank 视图进入：

从 Rank Contracts

打开 Rank → Contracts。
找到值得进一步研究的合约。
在固定 Inspect 列选择 Open symbol flow at GEX walls。
TradingFlow 会在 Flow 标签打开该标的抽屉，同时保留 Contracts 的筛选、排序和页码。

从 Rank Symbols

打开 Rank → Symbols。
打开一个标的的检视抽屉。
选择 Flow 标签。

Flow Evidence 是付费、由用户主动启动的深层数据加载。具备权益的用户需先选择 Load flow evidence，系统才会请求墙位对照及其数值。许可绑定当前标的；更换标的或关闭抽屉后会重置。

加载后：

确认资金流交易日与结构交易日一致。
选择全部、0DTE、周度或月度。
先阅读 GEX 曲线和 Spot / 墙位几何关系。
对照两道墙的状态。
打开审计卡，检查 Net DEX、权利金来源、成交笔数与 OI 覆盖率。
使用 View GEX map 查看更完整的结构图。
只有在需要标的级长期语境时，再展开独立的 30 个交易日资金流历史。

一个实用工作流

可以把该功能当成结构与执行之间的证据检查点：

步骤	TradingFlow 页面	要回答的问题
画地图	GEX 标签	所选范围的结构关键位相对 Spot 在哪里？
做对照	Flow 标签	精确行权价的同日资金流是一致、相反、混合，还是不可用？
查证据	墙位审计卡	有多少合约和成交支持该状态？权利金是否精确？OI 覆盖是否可用？
验证成交	Option Trades	最近成交与价格行为是否支持同一判断？
规划风险	你的执行图表	如果价格走出不同路径，交易逻辑在哪里失效？

GEX Flow Evidence 应当帮助你缩小问题范围，而不是替你做决定。Flow-aligned Call Wall 仍可能被突破；Flow-against Put Wall 也仍可能守住。价格、流动性、新闻、波动率以及不断变化的日内资金流仍然重要。

该功能刻意不做什么

不给墙位排名。
不计算 0–100 置信度评分。
不把墙位标记为保证目标、磁力位、支撑或阻力。
不从 Net DEX 推断做市商库存。
不把 OI 变化当作开仓或平仓证明。
当交易日或数据来源不一致时，不制造分类。

这种克制本身就是产品设计的一部分。GEX 是结构地图，资金流是本交易日观察到的成交带。TradingFlow 展示两者在哪里一致、在哪里冲突，同时保留可审计证据。

打开工作流

在 TradingFlow 中打开 SPY Flow Evidence

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