Guide

Max slippage or cancel

Write a max slippage / worst acceptable fill before place — if the print would breach it, cancel rather than chase. Pair it with no market order without GO, reject agent place without a fresh quote, never skip review before place, size from sleeve not from hope, and confirm cancel in the broker, not chat.

By Agent Lane Editorial · Page dated 27 September 2026

Answer first

Before a live place: write the worst fill you will accept (max slippage vs the fresh quote or your limit). If the live print would breach that bound, cancel or skip — do not chase with a wider marketable ticket. Size still comes from sleeve rules; order type still needs its own GO when marketable; the human still runs review before place; cancels are confirmed in the broker, not chat. Agent Lane publishes the checklist. We do not place trades, hold wallets, invent broker UI, or run your agents.

What this page is

A short operator guide for the fill-quality bound on the shield — max slippage or cancel — so a sized thesis does not turn into an accidental chase when the book moves. Pair it with no market order without GO, reject agent place without a fresh quote, never skip review before place, size from sleeve not from hope, confirm cancel in the broker, not chat, confirm buying power before place, and the shared-box checklist.

We are a publisher, not a trading desk. Product screens change; read quotes, limits, and cancels on the official page. We do not invent slippage panels, cancel menus, or Agentic click-paths. You write the bound and enforce cancel-not-chase at review.

Max slippage or cancel in plain terms

• Write the bound before place — reference price + max adverse move (ticks, cents, or %); cancel/skip if breached.
• Not hope pricing — “get me filled somehow” is not a max slippage.
• Same review step — bound + fresh quote + size from sleeve + order type under no market order without GO.
• Breach → cancel — do not chase; verify cancel in the broker UI.
• Gate at review — enforce at never skip review before place.

Why chasing after a breach is the failure mode

• Gap fills. A print already past your bound becomes a market chase if you amend wider — no market order without GO, reject agent place without a fresh quote.
• Size still “fits.” Sleeve size and BP can look fine while the fill wrecks the risk unit — size from sleeve not from hope, one risk unit per idea.
• Chat said cancel. Working or chasing without confirming cancel leaves live risk you thought was dead — confirm cancel in the broker, not chat.
• Urgency skips the card. “Just get me filled” past the bound is standing skip energy on fill quality — never skip review before place.

Where it sits in the shield stack

1. Read-only quote before trade connector — prove prices before place rights.
2. Size from sleeve not from hope — written ticket size rules.
3. Confirm buying power before place — venue cash/BP covers that ticket.
4. Reject agent place without a fresh quote — price freshness in the same review step.
5. No market order without GO — order-type GO; default limit/last-look.
6. Max slippage or cancel — fill-quality bound; breach means cancel, not chase.
7. Never skip review before place — human gate enforces the check.
8. Confirm cancel in the broker, not chat — verify cancel/flat in the venue UI.

Healthy flow: quote ladder → size from sleeve → read BP → fresh quote/last-look → order type under GO → write max slippage → place only inside the bound → if breached, cancel → confirm cancel in broker. Skip the bound and a well-sized thesis still chases a print past the sleeve’s worst fill.

How to run max slippage or cancel

1. Write max slippage before place. Reference price (fresh quote or limit), max adverse move, cancel/skip if breached — on the named plan: name the strategy before connect. No invented UI.
2. Same review step as quote, size, and order type. Fresh quote; size from sleeve; marketable only with order-type GO; BP. Large tickets: two-person rule.
3. Compare live print to the bound. If the would-be fill breaches max slippage, do not chase — cancel or skip.
4. Cancel in the venue UI; confirm afterward. Official cancel path; then confirm cancel in the broker. Do not trust chat.
5. Place only after human review when inside the bound. Never skip review; then confirm fills. First live after novelty: dry run.
6. Journal overrides that chase past the bound. Journal every override; if something misfired: revoke before you debug.

Practical checklist

• Max slippage / worst fill written before approve (reference + bound + cancel-if-breach).
• Fresh quote + size + order-type GO + BP in the same review step.
• Breach → cancel or skip — no “widen / market to chase.”
• Cancel confirmed in broker UI — not chat.
• Review before place still on — human enforces the gate.
• Chat urgency is not a bound.
• Confirm fills afterward when a place does go through.
• Dry run done before first live with a new connector/strategy.
• Overrides journaled if anyone chased past max slippage.
• No invented UI. Official order/cancel screens and your notes; you enforce.
• Shared-box pass. Who can approve a chase past the written bound on a shared computer — see shared-box.

Brokerage path: Shield brokerage spend. On-chain pay: Shield crypto spend.

What Agent Lane does not do here

• We do not place trades, preview your orders, or babysit your agents.
• We do not hold your funds, run a hot wallet, or settle payments.
• We do not invent slippage dashboards, cancel menus, or Agentic click-paths.
• We do not set your max slippage number, claim a product that auto-cancels on breach, or read your broker for you.

Related guides

• No chase after partial fill
• No market order without GO
• Reject agent place without a fresh quote
• Never skip review before place
• Size from sleeve not from hope
• Confirm cancel in the broker, not chat
• Confirm buying power before place
• Confirm fills in the broker, not chat
• Read-only quote before trade connector
• Dry run before first live place
• One risk unit per idea
• Two-person rule for large places
• Name the strategy before connect
• Write GO before scale-up
• Journal every override
• Review before place
• Paper before live
• Log session end checklist
• No new risk after session end
• Write invalidation before entry
• Reject duplicate place same thesis
• Confirm symbol before place
• No scale-in without GO
• Flatten all before connector revoke
• One order per idea until fill
• No place while unconfirmed fill
• Write max loss before entry
• Shared-box and connector checklist
• Shield brokerage spend
• Shield crypto spend

FAQ

What does max slippage or cancel mean?

It means: before you place, write the worst fill you will accept (max slippage vs the fresh quote or limit). If the live print would breach that bound, cancel or skip rather than chase. Pair with no market order without GO, reject agent place without a fresh quote, never skip review before place, size from sleeve not from hope, and confirm cancel in the broker, not chat.

What belongs in the max-slippage note?

Written before approve: reference price (fresh quote or your limit), max adverse move you will accept (ticks, cents, or %), and cancel/skip if breached — plus size from sleeve rules, and that buying power and a fresh quote were checked in the same review step. Hope and chat urgency are not a bound.

Why is chasing after a breach the failure mode?

A print that already exceeds your written worst fill turns a sized thesis into an accidental market chase. Without a hard cancel rule, the agent (or you) can keep working the ticket into a gap while size and BP still look fine. See no market order without GO and confirm cancel in the broker.

Does this replace no market order without GO or reject without quote?

No. Reject without a fresh quote is price freshness. No market order without GO is the order-type gate. Size from sleeve is ticket size. This page is the fill-quality bound. Confirm cancel verifies the cancel stuck. Never skip review is the human ticket gate. You need the stack.

Do I invent a slippage or cancel broker UI?

No. Use the official venue order ticket, quote/last-look, and cancel screens and your written sleeve rules. Agent Lane does not invent slippage dashboards, cancel menus, or Agentic click-paths.

When do I cancel instead of place or amend?

When the live quote or would-be fill breaches the written max slippage vs the reference you set in the same review step — cancel or skip; do not chase with a wider marketable ticket. Confirm the cancel in the broker UI, not chat.

Where do I apply this next?

At review before place: write max slippage / worst fill; check fresh quote, order type under GO, size from sleeve; if the print would breach, cancel or skip rather than chase; confirm cancel in the broker. Agent Lane publishes the checklist; we do not place trades or invent broker UI.

Next steps

Before an agent touches real money, review every order before it is placed, shield your brokerage account, and map the trading-agent options. Or browse all Agent Lane guides.