What is a Crypto Exchange

What is a Crypto Exchange?

A crypto exchange is a marketplace where buyers and sellers meet to trade cryptocurrencies.

Just like a stock exchange allows you to buy and sell company shares — a crypto exchange allows you to buy and sell Bitcoin, Ethereum and thousands of altcoins.

Two Types of Exchanges

Centralized Exchange (CEX)
Run by a company. You create an account, verify your identity and deposit money. The exchange holds your funds.

Examples: Binance, Coinbase, Kraken, Bybit

Fast, easy to use, high liquidity. But you don’t control your keys — the exchange does.

Decentralized Exchange (DEX)
No company controls it. Smart contracts handle everything automatically. You connect your own wallet and trade directly.

Examples: Uniswap, PancakeSwap, dYdX

You control your funds completely. But more complex to use for beginners.

How Does a CEX Work?

Step 1 — Create account
Sign up with email and verify your identity (KYC — Know Your Customer).

Step 2 — Deposit funds
Add money via bank transfer, credit card or crypto transfer.

Step 3 — Place an order
Choose which coin to buy, how much and at what price.

Step 4 — Order matched
The exchange matches your buy order with someone else’s sell order.

Step 5 — Store safely
Move your crypto to your own wallet for maximum security.

What is an Order Book?

Every exchange has an order book — a list of all open buy and sell orders.

• Bid — the highest price a buyer is willing to pay
• Ask — the lowest price a seller is willing to accept
• Spread — the difference between bid and ask

When bid and ask match — a trade happens automatically.

What is Trading Volume?

Volume is the total amount of a cryptocurrency traded in a given period — usually 24 hours.

High volume means:

• Many buyers and sellers active
• Easy to buy and sell quickly
• Price is less likely to be manipulated

Low volume means:

• Few traders
• Hard to sell large amounts
• Price can move dramatically on small orders

Always check volume before trading an altcoin. Low volume coins are dangerous.

Choosing a Safe Exchange

With hundreds of exchanges available — not all are trustworthy.

Look for:

• Regulated in major countries
• Proof of reserves published
• Strong security history
• High trading volume
• Good customer support

Avoid:

• Unknown exchanges with no regulation
• Exchanges promising unrealistic returns
• Platforms with no withdrawal history

Remember — keeping large amounts on any exchange is risky. As we learned in blockchain — “not your keys, not your coins.”

In the next topic we will learn about the different order types and how to place your first trade correctly.