Decentralised Exchanges (DEX): Its working, Advantages and Disadvantages

November 10, 2023by Supriya Kadu0

In the ever-changing cryptocurrency ecosystem, decentralised exchanges (DEXs) have arisen as a game-changing alternative to traditional centralised exchanges. 

DEXs offer a new paradigm that aligns with the key concepts of decentralisation, security, and trustworthiness as blockchain technology continues to disrupt established financial systems. 

In this guide we’ll look into how decentralised exchanges work, including their different varieties, benefits, and potential pitfalls.


Decentralised Exchange (DEX), how it works and advantages

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What are Decentralised Exchanges?


DEXs, or decentralised exchanges, are digital platforms that enable peer-to-peer cryptocurrency trading without the need for an intermediary or a central authority. 

DEXs, as opposed to traditional exchanges, which use centralised servers to connect buyers and sellers, operate on blockchain networks, allowing users to trade directly from their cryptocurrency wallets.


How does DEXs work?


Because decentralised exchanges are built on blockchain networks that allow smart contracts and where users maintain ownership of their assets, each trade incurs a transaction cost in addition to the trading fee. 

To use DEXs, traders interact with smart contracts on the blockchain.


  • Smart Contracts

Smart contracts are the foundation of decentralised exchanges. These code-written self-executing contracts carry out predefined rules automatically in response to specific events. 

Smart contracts in the context of DEXs simplify trading by automating asset swaps, order matching, and settlement.


  • Blockchain Technology

DEXs use the underlying blockchain technology to guarantee consistency and transparency. The blockchain records transactions on DEXs, creating a public ledger that is immune to tampering. 

As a result, there is no longer a need for a centralised authority to supervise and approve transactions, lowering the possibility of manipulation and fraud.


  • Wallet-to Wallet Trading

DEXs allow users to trade directly from their cryptocurrency wallets. 

This peer-to-peer strategy eliminates the requirement for users to deposit funds into the wallet of a centralised exchange, lowering the danger of hacking or misuse of funds. 

Throughout the trading process, users keep possession of their private keys.


Types of Decentralised Exchanges


DEXs have evolved over time, providing users with multiple options and procedures for trading cryptocurrencies in a trustworthy and decentralised environment. 

Each form of DEX has its own set of features and benefits that suit different user preferences and requirements.


On-Chair Order Book Exchanges


The order book in these DEXs is kept on the blockchain. Users can place buy or sell orders directly on the blockchain, and these orders are recorded in an irrevocable and transparent manner. 

Order books are used by centralised exchanges as well, but on-chain order books take this concept a step further by using blockchain technology.



  • Transparency: The order book is visible to all blockchain participants, enabling price discovery transparency.
  • Security: Because order books are on-chain, they benefit from the underlying blockchain’s security traits.


Automated Market Makers (AMMs)


AMMs transformed decentralised trading by replacing traditional order books with algorithmic pricing. Platforms such as Uniswap and PancakeSwap leverage liquidity pools to allow users to trade assets immediately. 

AMMs set prices using algorithms that adjust based on the ratio of assets in the liquidity pool.



  • Liquidity: AMMs frequently provide greater liquidity since users contribute to liquidity pools, allowing for faster and more efficient trading.
  • No order book: There is no need for users to wait for buyers or sellers; deals are performed against the liquidity pool.


DEX Aggregators


DEX aggregators are platforms that gather liquidity from various decentralised exchanges in order to provide consumers with the best trading rates possible. 

These aggregators compare prices from different DEXs and split orders to provide consumers with the best possible execution.



  • Improved Rates: Aggregators provide consumers with the best possible rates by utilising liquidity from many DEXs.
  • Reduced Slippage: Aggregators try to minimise slippage by spreading trades over multiple exchanges.


Advantages of DEX



One of the key benefits of DEXs is increased security. DEXs are less vulnerable to hacking assaults that target centralised exchanges because they lack a single point of failure. 

Users have more control over their cash, which reduces the possibility of unwanted access or misuse.



Privacy is generally prioritised by DEXs, which allow trading without the need for KYC (Know Your Customer) processes. This is appealing to consumers who respect privacy and want to retain control over their personal information.


Reduced Counterparty Risk

By facilitating wallet-to-wallet trading, DEXs reduce the need for consumers to entrust their funds to a third party. Users keep control over their private keys, which reduces the counterparty risk associated with centralised exchanges.


Global Accessibility

DEXs function on blockchain networks, making them available to users all around the world. This global accessibility is especially useful for users in areas where traditional banking services are unavailable.


Listing Opportunities

DEXs offer a more open and easily available platform for new and innovative projects. Cryptocurrency projects can launch their own coins on DEXs without the strict listing restrictions enforced by centralised exchanges, creating a more welcoming atmosphere for fresh projects.


Disadvantages of DEX


Liquidity Issues

Some DEXs, particularly those that rely on on-chain order books, may have liquidity issues as compared to their centralised counterparts. Due to a lack of liquidity, greater bid-ask spreads and slippage during deals can occur.


User Experience

The user experience on DEXs varies, with certain platforms being more difficult for bitcoin beginners. Transaction delays and increased fees during periods of network traffic can also have an influence on user satisfaction.


Regulatory Uncertainty

The regulatory framework for DEXs is continually changing. While the decentralised nature of these platforms has some advantages, it also raises issues in terms of following the changing rules in many jurisdictions.


Smart Contract Risks

Smart contracts are a major component of DEXs, and flaws in them can result in attacks or other abuses. Even though the purpose of audits is to improve security, there is always a chance that unanticipated flaws may arise.




Decentralised exchanges are an important step toward creating a more inclusive, safe, and transparent financial environment. 

DEXs provide users with greater control over their assets while eliminating dependency on central exchanges by employing blockchain technology and smart contracts.

DEXs may become the preferred solution for users wanting a secure and decentralised trading experience as the technology evolves and adoption grows.

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DISCLAIMER: Online Trading Institute is providing courses content and any related materials (including newsletters, blog post, videos, social media and other communications) for educational purposes only. We are not providing legal, accounting, or financial advisory services, and this is not a solicitation or recommendation to buy or sell any stocks, options, or other financial instruments or investments.