I bought the wrong amount. Can I undo it?

The short answer

A filled order cannot be reversed. There is no cancel button, no cooling-off period, and no support request that undoes it. Once it matched with somebody else’s order, the trade happened.

An unfilled order can be cancelled at any time, for free.

What you can do about a filled order is sell it back — which is a new, separate trade with its own cost and its own price.

Which situation are you actually in#

Open your order history before doing anything. It tells you which of these applies.

Status	Reversible?	What to do
Filled / Completed	No	The trade happened. Your only option is a new trade in the other direction — see below
Open / Pending (limit order)	Yes	Cancel it. Free, instant, and the held funds are released
Partially filled	Partly	The filled portion stands. Cancel the remainder
Deposit sent, not yet purchased	Yes	Nothing was bought. The money sits as a balance — you can withdraw it back to your bank
Card payment still authorising	Sometimes	An authorisation that has not settled may drop off. Do not assume it will — check the order history

If the order filled#

It is worth understanding why it is irreversible rather than assuming it is a policy that could be argued with.

When your order filled, it matched against a real counterparty who now holds the other side. Reversing your trade would mean reversing theirs, without their agreement. Exchanges cannot do that and neither can anyone else. This is the same reason a filled stock trade cannot be undone.

So “undo” is not available. “Sell it back” is.

Selling back, and what it actually costs#

If you bought more than you intended, or bought something you did not mean to buy, you can sell it. Two costs to be clear-eyed about:

You pay the trading fee twice
Once on the way in and once on the way out. On a spot order this is small; through a one-click buy the markup on both sides adds up considerably more.
You take whatever the price did in between
This is the part people underestimate. Even a few minutes can move the price. You may get back more than you paid, or less. Neither is a mistake — it is just what the market did.

Decide on the amount, not on the price

If you bought more than you can comfortably lose, sell down to an amount you can — and do it regardless of whether you are currently up or down. Waiting to “get back to even” before correcting a position size is how a small mistake becomes a long one.

If the amount is fine and you simply feel odd about the price you paid, that is not a reason to trade at all.

The wrong order to do things in#

The mistake itself is usually minor. What follows it often is not. A common sequence:

Realise something is wrong
Wrong amount, wrong asset, or just a jolt at seeing real money move.
Search for how to reverse it
And land somewhere that promises a recovery service.
Somebody offers to help
Being visibly stuck is exactly what fraudsters look for. A “recovery specialist” or a “support agent” appears, sounds competent, and asks for access or an upfront payment.

There is no recovery service

Nobody can reverse a filled trade or an on-chain transfer. Every service claiming otherwise is a second scam aimed at people who just lost money to a first one.

Real support never messages you first and never asks for your password, your codes or a fee to recover funds. See fake support.

The right order is: check the order history, work out which situation you are in from the table above, and then decide calmly. Nothing here gets worse by taking ten minutes.

The one that really is permanent#

Buying the wrong amount is recoverable at a cost. Sending coins to the wrong address, or over the wrong network, is not recoverable at all.

A confirmed blockchain transaction cannot be reversed by the exchange, by the network, or by anybody else. There is no support desk with the authority to undo it.

This is why rushing a withdrawal is a genuinely different category of mistake from mis-sizing an order, and why the advice for a first purchase is to leave the coins where they are until you are not in a hurry.

Preventing the next one#

Three checks, five seconds, before confirming anything:

Read the total, not the amount you typed. The total including fees is the number that leaves your account.
Count the decimal places out loud. The difference between 0.01 and 0.001 is a factor of ten and looks nearly identical on a phone.
Sanity-check the quantity. Quantity times current price should be roughly what you meant to spend. If it is off by 10×, you found the error before it cost anything.

Using a limit order also helps, because it gives you a moment between setting it up and it filling — and it can be cancelled during that moment.

Common questions#

Is there any cooling-off period on a crypto trade?

No. Consumer cooling-off rules that apply to some purchases do not apply to an executed trade on an exchange.

Can I charge back the card payment instead?

Attempting a chargeback on a legitimate purchase you authorised generally results in the account being frozen and the balance held. It is not a way to undo a trade, and it usually makes your position worse.

I bought a stablecoin instead of bitcoin.

Not a problem, and not something to reverse. Use it on the spot market to buy BTC — that is the normal two-step route, especially after a peer-to-peer purchase. See where are my coins.

I opened a futures position by mistake.

Different situation and more urgent. You hold a leveraged position, not coins, and it can be liquidated. Closing the position is the equivalent action. Read the first common mistake before doing anything else.

The deposit arrived but I changed my mind entirely.

If you have not bought anything, the balance is still money. Withdraw it back to your own bank account. You may pay a small withdrawal fee, and it must go back to an account in your name.

Last updated: 25 August 2026. Platform policies on cancellation and withdrawal differ and change — go by what your own screen and order history show. Not investment advice.

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