Guide

No chase after partial fill

After a partial fill, do not let the agent chase the remainder with worse prices, marketables, or “just finish the size” — cancel / leave working only what the written plan allows, confirm residual in the broker UI, and require a fresh GO + quote + slippage bound before any add. Pair it with max slippage or cancel, confirm fills in the broker, not chat, confirm cancel in the broker, not chat, no market order without GO, no averaging down without a new thesis, and reject agent place without a fresh quote.

By Agent Lane Editorial · Page dated 27 September 2026

Answer first

After a partial fill: stop the chase. Confirm filled vs residual in the broker, not chat. Cancel or leave working only what the written plan allows — do not widen, marketable-chase, or “just finish the size.” Any add needs a fresh GO, a fresh quote, and a max-slippage bound in a new review step — and must not be averaging down without a new thesis. 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 post-partial remainder rule on the shield — no chase after partial fill — so one sized ticket does not turn into an accidental gap chase or average-down when only part of the size prints. Pair it with max slippage or cancel, confirm fills in the broker, not chat, confirm cancel in the broker, not chat, no market order without GO, no averaging down without a new thesis, reject agent place without a fresh quote, one risk unit per idea, and the shared-box checklist.

We are a publisher, not a trading desk. Product screens change; read fills, working orders, and cancels on the official page. We do not invent residual panels, partial-fill menus, or Agentic click-paths. You write the remainder rule and enforce no-chase at review.

No chase after partial fill in plain terms

• Confirm filled vs residual in the broker — not chat; see confirm fills.
• Cancel or leave working only per plan — original limit / written remainder; no widen to chase.
• Confirm cancel / working state — confirm cancel in the broker.
• No “finish the size” — worse prices and marketables need their own order-type GO and are usually a chase, not a plan.
• Any add = fresh GO + quote + slippage — new review; fresh quote, max slippage or cancel; not averaging down without a new thesis.

Why chasing the remainder is the failure mode

• Gap chase on the leftover. Partial already printed; widening or marketable-chasing the rest is often a market chase — no market order without GO, max slippage or cancel.
• Accidental average-down. “Finish the size” at a worse price is averaging without a new thesis — no averaging down without a new thesis, one risk unit per idea.
• Chat said filled / cancelled. Residual still working while you think you are flat or done — confirm fills, confirm cancel.
• Urgency skips the card. “Just get the rest on” past the plan is standing skip energy on remainder — never skip review before place.

Where it sits in the shield stack

1. Reject agent place without a fresh quote — price freshness in the review step.
2. No market order without GO — order-type GO; default limit/last-look.
3. Max slippage or cancel — pre-place fill-quality bound; breach means cancel, not chase.
4. Never skip review before place — human gate on the original ticket.
5. Confirm fills in the broker, not chat — venue truth on what printed.
6. No chase after partial fill — remainder rule; cancel/leave working per plan; no chase; fresh GO before any add.
7. Confirm cancel in the broker, not chat — verify cancel/working residual in the venue UI.
8. No averaging down without a new thesis — add-size thesis gate if you do add.

Healthy flow: place inside max-slippage → confirm fills in broker → if partial, cancel or leave working per plan → confirm cancel/working in broker → any add only with fresh GO + quote + slippage + thesis — not “finish the size.” Skip the remainder rule and a well-sized thesis still chases the leftover into a gap.

How to run no chase after partial fill

1. Confirm filled vs residual in the broker. Official fills / working-orders; record sizes — confirm fills. No invented UI.
2. Cancel or leave working only per written plan. Named plan: name the strategy before connect. Cancel remainder or leave at original limit — do not widen to chase.
3. Confirm cancel / working state afterward. Confirm cancel in the broker. Do not trust chat.
4. Block chase / finish-the-size. Worse prices and marketables need order-type GO; usually reject as chase.
5. Any add: fresh GO + quote + slippage at review. Never skip review; fresh quote; max slippage or cancel; not averaging down without a new thesis; size from sleeve / one risk unit. Large tickets: two-person rule.
6. Journal overrides that chased the remainder. Journal every override; if something misfired: revoke before you debug.

Practical checklist

• Filled vs residual confirmed in broker UI — not chat.
• Remainder action matches written plan — cancel or leave working at original terms.
• No widen / marketable chase to “finish the size.”
• Cancel / working state confirmed in broker — not chat.
• Any add needs fresh GO + quote + max-slippage in a new review step.
• Not averaging down without a new thesis.
• Chat urgency is not a remainder plan.
• Review before place still on for any add.
• Overrides journaled if anyone chased the residual.
• No invented UI. Official fills/cancel screens and your notes; you enforce.
• Shared-box pass. Who can approve a chase after partial 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 residual dashboards, partial-fill menus, or Agentic click-paths.
• We do not set your remainder rule, claim a product that auto-cancels residuals, or read your broker for you.

Related guides

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

FAQ

What does no chase after partial fill mean?

It means: after a partial fill, do not let the agent chase the remainder with worse prices, marketables, or “just finish the size.” Cancel or leave working only what the written plan allows; confirm residual size and working orders in the broker UI, not chat; and require a fresh GO + quote + slippage bound before any add. Pair with max slippage or cancel, confirm fills, confirm cancel, no market order without GO, no averaging down without a new thesis, and reject agent place without a fresh quote.

What belongs in the partial-fill note?

Written on the named plan before any add: filled size vs intended size, residual allowed (cancel remainder vs leave working at original limit), and that any add needs a fresh GO + fresh quote + max-slippage bound in a new review step. Chat urgency and “finish the size” are not a plan.

Why is chasing the remainder the failure mode?

A partial fill already changed your risk. Chasing the leftover with worse prices or a marketable ticket turns one risk unit into an accidental average-down / gap chase while size and BP still look fine. See no market order without GO, no averaging down, and confirm cancel in the broker.

Does this replace max slippage or cancel or no averaging down?

No. Max slippage or cancel is the pre-place fill-quality bound. No averaging down is the add-size thesis gate. Confirm fills / confirm cancel are venue-truth checks. No market order without GO is the order-type gate. Reject without quote is price freshness. This page is the post-partial remainder rule. You need the stack.

Do I invent a partial-fill or residual broker UI?

No. Use the official venue order ticket, fills, working-orders, and cancel screens and your written sleeve rules. Agent Lane does not invent residual dashboards, partial-fill menus, or Agentic click-paths.

When may I add size after a partial?

Only after a fresh written GO, a fresh broker quote (or last-look), and a written max-slippage / worst fill in a new review step — and only if the named plan allows an add (not “just finish the size”). Confirm residual and any cancel in the broker UI, not chat.

Where do I apply this next?

Right after a partial fill: confirm filled vs residual in the broker; cancel or leave working only per the written plan; do not chase with worse prices or marketables; any add needs fresh GO + quote + slippage bound at review. 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.