Exchange Types

Understanding the three main types of exchanges Hummingbot supports

Overview

Hummingbot connectors standardize interfaces to three fundamentally different types of exchanges, each with distinct trading mechanisms, custody models, and technical architectures.

CLOB CEX (Centralized Exchange Order Book)

Central Limit Order Book (CLOB) on Centralized Exchanges (CEX) are traditional cryptocurrency exchanges with custodial wallets.

Characteristics

Custody

Custodial - Exchange holds your funds. You deposit assets to exchange wallets.

Connection

API Keys - Connect using API key + secret (and sometimes passphrase).

Order Matching

Off-chain - Order matching happens on exchange servers, instant execution.

Settlement

Off-chain - Trades settle in exchange internal ledger, no blockchain transaction required.

Market Types

Spot Markets: Trading physical cryptocurrency assets.

• Connector suffix: None (e.g., binance, okx)
• Order types: Market, limit, limit maker
• Examples: Binance Spot, OKX Spot, KuCoin Spot

Perpetual Markets: Trading perpetual futures contracts with leverage.

• Connector suffix: _perpetual (e.g., binance_perpetual, okx_perpetual)
• Additional features: Funding rates, position modes (hedge/one-way), leverage
• Order types: Market, limit, stop-loss, take-profit
• Examples: Binance Futures, OKX Perpetuals, Bybit Perpetuals

Examples

Exchange	Spot Connector	Perpetual Connector	Type
Binance	binance	binance_perpetual	CLOB CEX
OKX	okx	okx_perpetual	CLOB CEX
Bybit	bybit	bybit_perpetual	CLOB CEX
KuCoin	kucoin	kucoin_perpetual	CLOB CEX
Gate.io	gate_io	gate_io_perpetual	CLOB CEX

Source: README.md:102-131.

CLOB DEX (Decentralized Exchange Order Book)

Central Limit Order Book (CLOB) on Decentralized Exchanges (DEX) use blockchain-based or hybrid order books with non-custodial wallets.

Characteristics

Custody

Non-custodial - You control your funds via private key. No deposits required.

Connection

Wallet Keys - Connect using wallet private key or seed phrase.

Order Matching

On-chain or Hybrid - Orders may be matched on-chain or off-chain depending on design.

Settlement

On-chain - Trades require blockchain transactions, may have gas fees and latency.

Architecture Variants

Fully On-Chain Order Books

All order operations (place, cancel, match) happen on-chain.

• Higher latency (block time)
• Gas fees for all operations
• Maximum decentralization
• Example: XRP Ledger, early Dexalot

Hybrid Order Books

Orders placed off-chain, settlement on-chain.

• Fast order placement and cancellation
• Gas fees only on settlement
• Reduced blockchain load
• Examples: dYdX v4, Hyperliquid, Injective, Vertex

Market Types

Spot Markets: Trading tokens directly on-chain.

• Examples: Hyperliquid Spot, Injective Spot, Vertex Spot
• Connector examples: hyperliquid, injective_v2, vertex

Perpetual Markets: On-chain perpetual futures trading.

• Examples: dYdX v4, Hyperliquid Perps, Injective Perps
• Connector examples: dydx_v4_perpetual, hyperliquid_perpetual, injective_v2_perpetual

Examples

Exchange	Spot Connector	Perpetual Connector	Type
Hyperliquid	hyperliquid	hyperliquid_perpetual	CLOB DEX
dYdX v4	-	dydx_v4_perpetual	CLOB DEX
Injective	injective_v2	injective_v2_perpetual	CLOB DEX
Vertex	vertex	-	CLOB DEX
Derive	derive	derive_perpetual	CLOB DEX
XRP Ledger	xrpl	-	CLOB DEX

Source: README.md:106-132.

AMM DEX (Automated Market Maker)

Automated Market Maker (AMM) decentralized exchanges use liquidity pools and algorithmic pricing instead of order books.

Characteristics

Custody

Non-custodial - Assets in smart contract pools or your wallet.

Connection

Gateway Middleware - Hummingbot connects via Gateway to blockchain nodes.

Pricing

Algorithmic - Prices determined by pool ratios (e.g., constant product x*y=k).

Settlement

On-chain - All swaps are blockchain transactions with gas fees.

AMM Sub-Types

Router DEXs

DEX aggregators that route trades across multiple pools for best prices.

• Examples: 0x Protocol, Jupiter
• Features: Multi-hop routing, price optimization
• Connectors: 0x, jupiter

AMM (Constant Product)

Traditional AMMs using constant product formula (x*y=k).

• Examples: Uniswap V2, PancakeSwap, SushiSwap
• Features: Simple liquidity pools, full-range liquidity
• Connectors: uniswap, pancakeswap, sushiswap, traderjoe, quickswap, balancer, curve

CLMM (Concentrated Liquidity)

Concentrated Liquidity Market Makers with custom price ranges.

• Examples: Uniswap V3, Raydium CLMM, Meteora
• Features: Capital efficiency, custom liquidity ranges, higher fees
• Connectors: uniswap (V3), raydium (CLMM mode), meteora

Gateway Middleware

AMM connectors require Gateway, a separate TypeScript service that interfaces with blockchain nodes:

# Install Hummingbot with Gateway
make setup
# Answer 'y' when prompted:
Include Gateway? [y/N]

Gateway provides:

• Blockchain node connectivity (Ethereum, BSC, Polygon, Solana, etc.)
• Smart contract interaction
• Wallet management and transaction signing
• Standardized APIs for AMM interactions

Source: README.md:52-78.

Examples

DEX	Type	Sub-Type	Connector
Uniswap	AMM DEX	Router, AMM, CLMM	uniswap
PancakeSwap	AMM DEX	AMM	pancakeswap
Raydium	AMM DEX	AMM, CLMM	raydium
Curve	AMM DEX	AMM	curve
0x Protocol	AMM DEX	Router	0x
Jupiter	AMM DEX	Router	jupiter
Meteora	AMM DEX	CLMM	meteora
SushiSwap	AMM DEX	AMM	sushiswap
Balancer	AMM DEX	AMM	balancer

Source: README.md:139-162.

Comparison Matrix

Feature	CLOB CEX	CLOB DEX	AMM DEX
Custody	Custodial	Non-custodial	Non-custodial
Auth Method	API Keys	Wallet Keys	Wallet Keys (via Gateway)
Order Placement	Instant	Fast (hybrid) or slow (on-chain)	N/A (direct swaps)
Gas Fees	No	Yes (on settlement)	Yes (every swap)
Latency	Low (ms)	Medium (hybrid) to High (on-chain)	High (block time)
Order Types	Market, Limit, Stop	Market, Limit	Swap only
Slippage	Low (order book)	Low (order book)	Can be high (pool depth)
MEV Risk	No	Yes	Yes
Liquidity	Deep	Varies	Pool-dependent

Choosing an Exchange Type

Use CLOB CEX when:

• You need high-frequency trading with low latency
• You want deep liquidity and tight spreads
• You’re comfortable with custodial risk
• You need advanced order types (stop-loss, trailing stop, etc.)

Use CLOB DEX when:

• You want non-custodial trading with order book efficiency
• You’re trading on-chain derivatives or exotic pairs
• You need transparency and censorship resistance
• You can tolerate gas fees and some latency

Use AMM DEX when:

• You’re trading long-tail assets not on centralized exchanges
• You want to provide liquidity and earn fees
• You need permissionless, unstoppable trading
• You’re comfortable with impermanent loss and gas costs

Related Concepts

• Connectors - Technical implementation of exchange interfaces
• Strategies - Trading strategies that work across exchange types
• Order Types - Different order execution methods