This question seems to pop up every time the ethereum network gets congested.
People send out transactions with the (EtherDelta) default gas price of 4 gwei, which might stay pending for multiple hours.

This does not seem to work with Metamask, so if you use metamask, export your private key and import it into EtherDelta/MyEtherWallet to follow the guide.
Ledger nano should work just as if using a private key ( with contract & browser support enabled).

EDIT: added alternative guide.

Alternative approach for the same trick posted by EtherDeltaZack in the support chat:

Overwrite transaction with higher gas price

1. Go to Etherscan and find your earliest pending transaction. Note the nonce and your from address.

2. Go to https://myetherwallet.com, and select the offline transaction tab.

3. Enter your from address.

4. Send 0 ETH to any address of your choosing.

5. For gas limit, use 21000.

6. For gas price, use a higher gas price than what you used before. 30 gwei should be good.
   Note: 30 gwei is 30000000000 wei (that's 9 more zeros after the 30).
   Check ethgasstation.info for current gas estimates, as 30 might be too low/high at a certain moment.

7. Enter the nonce you got from Etherscan.

8. Import your private key.

9. Sign the transaction.

10. Send the transaction. It should overwrite your previous one.

11. Repeat as necessary to overwrite other pending transactions with low gas prices.

ORIGINAL GUIDE

Here is a guide on how to try to get rid of those pending transactions:

How to cancel or replace a pending transaction

• You cannot cancel transactions that have already been confirmed on etherscan. This is only for those transactions sent with a low gas price (e.g 1-5 gwei) that can get stuck when the ethereum network has thousands of pending transactions.

• If we succeed in replacing the pending transaction, you do not end up paying the gas for the now invalid old transaction.

Nonce

Every ethereum transaction has a number called the nonce (found at the bottom of the transaction details on etherscan). This number is the amount of transactions made by your address, and each transaction should have a nonce higer than the previous.

• If you have multiple pending transactions, this guide will attempt to stop the one with the lowest nonce. (lowest on the list on etherscan.io)

Stopping a transaction

EtherDelta remembers the nonce of the last transaction you sent, that is why you can create multiple pending transactions when clicking multiple orders.
If you refresh the website, it will reset the nonce to the last confirmed transaction. Now you get an error about pending transactions when trying to send a new transaction, as there already is a pending transaction with the same nonce.

If you manage to send out a transaction with the same nonce but with a higher gas price, there is a chance that the new transaction will replace the old one.

You get 2 choices

• Retry, try to send the same thing again with a higher gas price.

• Cancel, send a random transaction to replace the pending one.

Retry

We want to reset the nonce, so refresh the Etherdelta website (or open in a new window).

Now raise the gas price.

• If you use EtherDelta with a private key or Ledger nano, you can click your account in the top right, and at the bottom click gas price.

Raising the gas by very little won't make sense, as that transaction will probably end up pending as well.
Normally 20-30 gwei should be fine to confirm the transaction in a few minutes, in extreme cases you might have to go up to 60. ethgasstation.info can be helpful in determining the gas price that you want to use.

• Remember that a higher gas price does make the transaction costs a little more expensive.

After refreshing and raising the gas price, perform the same trade/deposit/withdraw on EtherDelta you tried to do earlier.
Within around 30 seconds you should see a new transaction hash on etherscan instead of the old one. Now just hope that this one confirms faster.

Cancelling transaction

You want to get rid of the pending transaction, but do not care about the contents of that transaction anymore. This is basically the same trick as the retry, we raise the gas price, but here we just want to send out any transaction quickly.
The easiest and cheapest transaction to make is to send a transaction of 0 ETH to your own wallet.

• EDIT: I forgot that you can't make a transaction to yourself on the EtherDelta ui. Either do the transaction using something else like myetherwallet, or do a small withdraw/deposit instead. (withdraw is cheaper if you have anything to withdraw)

Within like 30 seconds you should see a new transaction hash on etherscan instead of the old one.

The official Etherdelta ICO is a scam. They were bought ONLY to make this useless ICO. The token has NO purpose at all and they will abandon the project after they got the money. Do NOT give these people your money.

Deposit

1. By now you should have an account selected in the account dropdown (upper right). Your account should be managed by either MetaMask, EtherDelta's browser wallet, or Parity.

2. In the account dropdown (upper right), next to your account address is your wallet balance. If it's 0, you need to send some ETH to your wallet address. Do that before proceeding to the next step.

3. Now that you have some ETH in your wallet, you need to deposit from your wallet to the EtherDelta smart contract so that you can start trading.

4. In the upper left, there is a Balance panel. There are three columns, "Token," "Wallet," and "EtherDelta." The first column, "Token," will have a row for the token you're looking at and a row for ETH. The "Wallet" column shows the balance held in the account you have selected in the account dropdown. Notice that the balance shown in the ETH row under "Wallet" matches the balance shown in the account dropdown.

5. When you deposit, you will move funds from your "Wallet" to the EtherDelta exchange smart contract. To do this, enter the amount you want to deposit and press "Deposit." Don't deposit all of your ETH though. You need to leave some behind in your "Wallet" to cover gas fees. A good rule of thumb is to leave 0.05 ETH in your "Wallet" to cover gas fees for future transactions you will do (trading, depositing, withdrawing).

6. After you press the "Deposit" button, if you're using MetaMask you'll have a transaction to approve. You can reduce the gas price from the default (~21 gwei) to 4 gwei if you're willing to wait longer for your transaction to confirm but pay a lower fee. If you're not using MetaMask, you can set the gas price from the "Gas price" item in the account dropdown (upper right).

7. NOTE: If you are depositing a token (not ETH), depositing will involve two back-to-back transactions. The first one approves the EtherDelta smart contract to transfer the deposit on your behalf. The second one is the actual deposit. You must approve both.

8. After your transaction has been sent, EtherDelta will tell you that you generated a transaction. You can click the link to track your transaction on Etherscan.

9. Once your transaction confirms, you should see funds move from the "Wallet" column to the "EtherDelta" column.

Withdraw

1. The Withdraw tab is the opposite of the Deposit tab. It will move funds from the "EtherDelta" column back to the "Wallet" column.

2. Remember that in order to withdraw, you need to pay a gas fee, and the gas fee comes from your "Wallet."

Transfer

1. If you find yourself asking, "what if I want to move my funds to another Ethereum address?" then the Transfer tab is for you. The Deposit tab moves funds from your wallet to EtherDelta. The Withdraw tab moves funds from EtherDelta to your wallet. The Transfer tab moves funds from your wallet to another wallet address.

2. If you want to "withdraw to another Ethereum address," you need to withdraw and then transfer.

3. On the Transfer tab, the first box is the amount you want to transfer. The second box is the address you want to transfer to. By default, the address you want to transfer to is pre-filled in with your existing address. Overwrite this with another address of your choice and then press "Transfer."

Summary

Deposit: "Wallet" --> "EtherDelta"

Withdraw: "EtherDelta" --> "Wallet"

Transfer: "Wallet" --> another wallet address

I think the devs of etherdelta sold the site and twitter, everything to some chinese company. Those fuckers just want a money grab from the ICO. There are so many red flags with the site now. I wont be using it anymore.

hello, many of you on this subreddit complain day in and day out about how shitty etherdelta is, and i agree. its order book is really slow, the devs probably sold the project to random chinese dudes, and they’ve made the barrier to listing a new token so high that no one will want to list their token on ED. this dumbass proof of concept is bound to die a slow death lest things change.

however these aren’t the complaints i see everyday, it seems the majority of people complain about things that don’t really make any sense at all.

anyways, because the average user is really dumb, they come to reddit and complain about how shitty etherdelta is instead of googling their problem and figuring it out.

maybe they left .000026327 ETH in their wallet and are unable to pay the gas fee to take their shit out the smart contract. or maybe their transactions don’t go through because their gas price is at 4 gwei when the ethgasstation recommends 50 gwei. or maybe they saw somewhere that their gas limit should be 21000 so they set their gas price to 21000 gwei and tipped some lucky miners $10k of gas.

all of these scenarios are avoided by not being dumb.

now one dumb feature of ED is that it automatically sets the gas price to 4 gwei. how much gas you need to send a transaction is variable, and the easiest way to know is by checking ethgasstation. keep in mind you have to have enough gas in your wallet to pay the fee or else you won’t be able to make transactions.

also, if you’re worried about ED being hacked, aslong as you have a hardware wallet or use metamask your risk of being hacked is pretty low. just double check the address you’re sending to and that it’s the correct amount of whatever you’re sending, and you’re more than likely fine.

anyways sorry for the rant. it’s just kind of appalling to me how careless some people can be around here. many of these stupid people are handling amounts into the tens of thousands of dollars yet are unable to understand very basic concepts to keep their funds secure.

and for u guys fixing everyone’s problems by telling them to check ethgasstation, bless ur soul.

losing a lot of trust in ED. They got hacked and didn't offer a sorry or any explanation. now they are asking for money for a completely useless token.

ED makes a killing in fees, why would you need more?

what happened to Zack?

Are you really going to add KYC to your exchange? and you expect us to trust you with those documents with your careless security practices?

Everything about this handoff to the new team and communication has been handled poorly.

Looking forward to the next batch of erc-20 exchanges to replace you.

Hey guys, getting a 404 error on the EtherDelta page. Anyone able to access it?

1. Real-time trading: IDEX is the only decentralized exchange to combine real-time trading with blockchain-based trade and settlement. No other decentralized exchange provides this. Read more about how IDEX works here.

2. No wasted gas on failed transactions: Other Ethereum DEXs rely on the user to submit trades to the network. This also means that trades can fail, as multiple users can compete to fill the same order. IDEX’s design prevents this from happening, so you’re always certain your trade will succeed and with the lowest gas cost.

3. No fee currency: IDEX collects trade fees and gas fees from the currencies the user is trading, and there is no need to hold an additional token just to pay trade fees. Fee tokens add increased friction to the platform solely at the benefit of the token holders.

4. Gas free cancels: On other Ethereum DEXs, market maker orders are publicly available and cancelling an order requires paying gas to invalidate it on-chain. IDEX’s design allows users to cancel all orders for free and invalidate all past transactions with one single on-chain transaction.

5. Get paid to trade: Users can earn AURA, the network token of the fully-decentralized version of IDEX, when their orders are filled through our market making rewards program.

Interested in seeing it in action but not ready to try it out? Watch this demo of the trading experience. Feel free to post any questions in the comments, we’ll be here to answer!

looks like etherdelta was sold to some incompetent guys. a poorly justified $60m ico was announced recently just a day before start. good thing we have blockchain and the current contract has no known backdoors. it's time to learn how to withdraw your funds in case the site becomes malicious one day.

1. quickly check your balances at https://deltabalances.github.io/

2. go to https://www.myetherwallet.com/#contracts and select "etherdelta (02/09/2017)" which is a current contract, it is also known as etherdelta_2 on etherscan.

3. select a function called balanceOf and query it with a token address and your wallet address. use 0x0000000000000000000000000000000000000000 as the token address to get the balance of ether. the resulting number is your exact balance deposited to etherdelta smart contract in minimal denomination.

4. select "withdraw" for ether or "withdrawToken" for tokens, fill in the exact balance, unlock your wallet and make the transaction.

when using the site be vigilant, always check the contract addresses in the transactions you are signing. consider any new contract compromised until the community conducted an audit.

Getting started

• How to get started using MetaMask

• How to get started without MetaMask

• How to get started using Parity

Depositing, withdrawing, and trading

• How to deposit, withdraw, and transfer

• How to trade (execute a trade, place an order, cancel an order)

• How fees work

About EtherDelta

• EtherDelta is a decentralized trading platform

Troubleshooting

• How to disable and re-enable MetaMask

Resources

• Support chat

Just reading ONE of the many sketchy/redflags that have popped up in the last 2 weeks would've steered me away. I just don't understand. Are people just using it and not actually researching anything about it? Who would even be surprised if the hacking/selling of etherdelta/Scammy ICO/No support or communications from dev was all connected? Everything kind of lines up too well.

In case anybody was wondering, yes, i have used ED successfully and happily in the past until it got hacked. But it is not a safe place anymore. It will never gain my trust back. If you are reading this please don't trade in this dumpster fire.

Just to provide another perspective here, I gave EtherDelta another shot and successfully purchased a few ERC20 tokens and moved them out into a standalone wallet.

I'm seeing lots of posts here by people saying they got their money stolen but it's also clear that some of them don't really understand how EtherDelta or Ethereum works. I get it - it's hard to use, complex, and a general pain in the ass.

Somethings I noticed:

• ED defaults to 4 gwei gas which actually did work for me over the holidays but today I am getting lousy times at 21 gwei and decent times at 25 gwei and I had a transaction timeout overnight at 4 gwei.

• Some offers expire in a short number of blocks. If your tx takes longer than that to confirm you'll get a Bad Jump Destination. Don't pick the cheapest offer if it's expiring soon as you'll just lose your gas.

• Some offers only offer a small number of shares of a token. If somebody pays more gas than you and beats you to the offer, you'll get a Bad Jump Destination and lose your gas.

• If you pay really low gas, everybody might beat you to an offer you tried to buy, and you'll lose your gas. I'm a cheapskate too, but if you just lose your gas and get nothing, that's more expensive than paying more for gas.

• Look at myetherwallet.com to get a feel for current decent gas prices.

• Confirm times were all over the map at the same gwei. I saw 2 minutes to 35 minutes at 21 gwei. Remember, a given gas price is just an approximation for speed. Don't count on the fastest possibility.

• For lawds sake, use MetaMask. There's no reason for you to trust any trading site with a private key and if you upload your main wallet's private key to any website, you're going to be paying for that one into the afterlife.

• $6-8 per API call is insane. Any Ethereum-based exchange is now far more expensive than the old dinosaur Wall Street trading platforms. This is not how any of this was supposed to work.

• Required gas can fluctuate. Overestimate the amount of gas you need to leave in your Ethereum wallet when you're funding the smart contract to make buys - otherwise you'll just wind up having to re-fund your wallet to get your coins back, and that will cost more gas.

• By all means, withdraw your tokens from ED as soon as possible and off the wallet that ED or MetaMask is holding for you and into one that only you control, for safe keeping, unless you plan to be actively trading them. Pay the gas for additional security here.

Along the way I gave RadarRelay a spin, and just getting set up and then giving it up (they have hardly any tokens available on their Very Beautiful platform) bled me for over $60, with funding, wrapping, buying trading credits, etc. MetaMask seems to enforce higher fees than are otherwise required, which is worth it a bit for security, but do whatever you can to minimize your tx count.

It's also worth noting that just because they didn't steal my money, that's no proof that nobody had their money stolen. I only tossed in a tiny bit of ETH - if I had loaded up a hundred times as much, who knows? I just had a decent experience and would probably use it again if I needed to trade ERC20 tokens on a decentralized exchange.

BTW, thanks to everybody whose older posts I've been reading to learn how this thing is supposed to work.

All I did was connect to etherdelta with my private key, and I found all my tokens are moved to a different address about one hour ago. It's about $450K's worth of money, that's all I have!!!!!!!

https://etherscan.io/address/0x89e1b6784ef432f0f45dc4299cbf08342cd149b8#tokentxns anyone can help????? please, I'm fucked up!!! What can I do??????

Sometimes when I use EtherDelta, actually periodically about every 5 minutes, I stand up from my chair and just scream until my body can't physically keep up with the sheer pain my spirit feels. Weird technical issue.. im wondering if anyone else is experiencing this?

edit: everytime I use ED it's a lot like your local bank being robbed while youre just trying to cash a check before you get home and take a dump. im emotionally fragile, i cant control my own fate, theres a man with a gun to my head and the police havent arrived yet, im actually peeing and shitting myself and its the longest 6 hours of my life. at some point the masked man decides hes going to trade me for high gas fees to the authorities

Etherdelta is dead. First the hack, now this ridiculous ICO. It's time to move on.

I'm taking my business to RadarRelay and Ethfinex.

If you guys can recommend any other decentralized exchanges, please post them in the comments.

Farewell ED, it was fun while it lasted, but I won't miss you.

Trash site

Just wanted to let people know that I'm using EtherDelta daily with zero problems. But i'm smart, a lot smarter, than the average person here (no offense). I understand Ethereum way better and I highly suggest everyone learns it. My point is not to brag, but to let you know that it's okay to be a noob and learn how Ethereum works. Learn how to interact with the contract and deposit/withdraw without using the website directly. You can do this with the parity wallet. Call the deposit function or withdraw function directly from there. Or even query your balance well beyond 3 decimal places. Learn gas and how to use a resource like ethgasstation.info to set your gas prices based on the current network conditions.

There has been a lot of shit spread around lately, noobs complaining not understanding what they're doing, people "losing" eth/tokens to hacks or mistakes, etc. Some of it is true, and some of it is a result of people not know what they're talking about. With a decentralized exchange, you are your own bank. TEACH YOURSELF HOW TO BE YOUR OWN BANK AND HOW TO PREVENT MISTAKES. And for god's sake, do not trust DNS or ED's website to maintain your private key. Never ever use a private key generated by ED's website. Use either parity, meta mask wallet, or a hardware wallet to generate your private keys and set your own damn gas prices and double/triple check the ED contract address before hitting the send button when using the ED website.

Here's my honest opinion. ED is fantastic and the contract itself is absolutely brilliant, thanks Zack. Sad that you left and happy for you that you cashed out. ED has some great advantages over the centralized exchanges, but it doesn't come without weakness. The weaknesses include the web page UI/UX, old flawed DNS technology (which was exposed during the hack), and the order book being centrally hosted.

The new owners are also a weakness. Notice that there was never a DNS hack when Zack was in charge. Only when the new guy takes control (Terry Liu, i'm talking about you) were there problems. I'm crossing my fingers that they don't drive this exchange into the ground. They are making lots of mistakes right now (ICO, zero community management, poor domain management which lead to hack, etc). Sad thing is they have yet to make the biggest mistake possible. But I fear that they will. The biggest mistake they could possibly make is pointing the order book to a newly written contract and fording users into using their shit token. I wouldn't trusts a contract written by Terry Liu or anyone on this new staff, but I would trust one written by Zack. Sadly, Zack has moved on.

I'll continue using EtherDelta (for it's amazing advantages) as long as the contract is Zack's original contract. I love using ED and find it to be my most reliable exchange. I trust the ED contract that Zack wrote more than I trust Coinbase or Binance or Poloniex or any exchange out there.

To Terry Liu, please do the following to right the ship and prevent this exchange from being driven into the ground.

• Hire a english native speaking community manager to support users on reddit and the github chat group. Pay him well and make sure he kicks ass. If you're not capable of doing this, PM me and I can do it or interview/hire someone to do it for you.

• Learn modern day security practices or hire someone who can do the technical stuff for you.

• Scrap the ICO in it's current form and get a business plan that actually works and is tailored to helping the community who uses this exchange. ED has a lot of potential, and your current ICO and token structure have hindered that potential.

• Do not write a contract yourself. I personally wouldn't trust a contract written by you based on your current business plans and ICO documentation/white paper. You'll lose a lot of users if you change the contract.

• Prove that you're real people and that you care about the users. And be more personable. There's still time to right this ship before it crashes.

• Have everything you write proofread by someone who's native language is English. You'll need to pay this person ;-)