Yes. A Kraken Futures limit order can fill while a cancellation request is being processed. A cancel request or acknowledgement should not be treated as proof that no execution occurred: check the order’s resulting state and its fill records.
Why a cancellation request may not stop a fill
Submitting a cancellation is an operation sent to the exchange; it is not the same as confirming the order’s final state. If execution reaches the matching process before cancellation takes effect, some or all of the remaining order may fill.
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Kraken’s MENA Market Rulebook states: “Cancellation requests may not be processed immediately, and accordingly an Open Order may be executed after a cancellation request for that Order has been submitted.” That rulebook is jurisdiction-specific. Its wording supports the possibility of a fill after a request is submitted, but it should not be treated as the governing contractual term for every Kraken Futures customer. Kraken Market Rulebook MENA
For Kraken Futures specifically, the API documentation describes fills and cancellations as distinct lifecycle events. The documentation reviewed does not establish a universal matching-engine sequencing guarantee for every successful cancel response or API version. Therefore, a successful response alone does not establish that zero quantity filled during the cancellation race.
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How to tell what happened to your order
Check the order’s lifecycle and filled amount
Kraken Futures’ open-orders WebSocket feed includes order details such as quantity, filled amount, limit price, timestamps, and the order identifier. Its documented lifecycle reasons distinguish partial_fill, full_fill, and cancelled_by_user. A fully filled or cancelled order is removed from the open-orders snapshot, so an order no longer appearing as open does not, by itself, tell you whether it filled, was cancelled, or both in sequence. Kraken Futures Open Orders WebSocket documentation
Reconcile with order and trade history
Use authenticated order updates to follow your own order, then compare the resulting filled quantity with your account’s trade records. Kraken Futures’ trade-history endpoint returns fill records with price, size, and time. Its documented result is limited to the most recent 100 trades within the prior seven days or since the most recent trading-engine restart, whichever is sooner. Kraken Futures trade history
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Kraken also documents public order-event history, including cancellation-event data with a timestamp and reduced quantity. This can help reconstruct events for public market orders, but it is not a substitute for your private account order and trade records. Kraken Futures public order events
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A practical reconciliation workflow
- Record the order identity and timing. Keep the Kraken order ID, the time you sent the cancel request, and the response. If you supplied a client order identifier, retain it too.
- Read the resulting order update. Check the order’s lifecycle reason and cumulative filled amount in authenticated order updates rather than inferring the outcome from the cancel response alone.
- Review the fills. Compare the order update with trade-history records for executions around the cancellation time. Use timestamps, price, size, and identifiers to reconcile the records.
- Resolve any gaps using history. If a streaming connection was interrupted, consult the available order and trade history to reconcile what happened. A live feed is useful for monitoring, but the cited documentation does not promise it can recover every event missed during a connection gap.
Kraken documents cl_ord_id, a client-assigned order identifier that can be used when cancelling or amending an order. Logging it alongside the Kraken order ID and request timing can make it easier to associate later updates and requests with the correct order. Kraken Client Order Identifiers
What the dead man’s switch can—and cannot—do
Kraken Futures’ dead-man’s-switch endpoint starts a timer that cancels all of a user’s orders if the timer expires. Kraken recommends refreshing it every 15–20 seconds with a 60-second timeout. It is designed as a fail-safe for network malfunctions; because it operates on a timeout and cancels all orders, it is not a way to guarantee that one particular order cannot fill before cancellation occurs. Kraken Futures dead man’s switch
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