CCXT for C#

A comprehensive guide to using CCXT in C# and .NET projects for cryptocurrency exchange integration.

Installation

Via NuGet Package Manager

dotnet add package CCXT.NET

Or via Visual Studio:

1. Right-click project → Manage NuGet Packages
2. Search for "CCXT.NET"
3. Click Install

Requirements

• .NET Standard 2.0 or higher
• .NET Core 2.0+ / .NET 5+ / .NET Framework 4.6.1+

Quick Start

REST API

using ccxt;

var exchange = new Binance();
await exchange.LoadMarkets();
var ticker = await exchange.FetchTicker("BTC/USDT");
Console.WriteLine(ticker);

WebSocket API - Real-time Updates

using ccxt.pro;

var exchange = new Binance();
while (true)
{
    var ticker = await exchange.WatchTicker("BTC/USDT");
    Console.WriteLine(ticker.Last);  // Live updates!
}
await exchange.Close();

REST vs WebSocket

using ccxt;

using ccxt.pro;

Fetch*

Watch*

Method naming: C# uses PascalCase -

FetchTicker

fetchTicker

WatchTicker

watchTicker

Creating Exchange Instance

REST API

using ccxt;

// Public API (no authentication)
var exchange = new Binance
{
    EnableRateLimit = true  // Recommended!
};

// Private API (with authentication)
var exchange = new Binance
{
    ApiKey = "YOUR_API_KEY",
    Secret = "YOUR_SECRET",
    EnableRateLimit = true
};

WebSocket API

using ccxt.pro;

// Public WebSocket
var exchange = new Binance();

// Private WebSocket (with authentication)
var exchange = new Binance
{
    ApiKey = "YOUR_API_KEY",
    Secret = "YOUR_SECRET"
};

// Always close when done
await exchange.Close();

Common REST Operations

Loading Markets

// Load all available trading pairs
await exchange.LoadMarkets();

// Access market information
var btcMarket = exchange.Market("BTC/USDT");
Console.WriteLine(btcMarket.Limits.Amount.Min);  // Minimum order amount

Fetching Ticker

// Single ticker
var ticker = await exchange.FetchTicker("BTC/USDT");
Console.WriteLine(ticker.Last);      // Last price
Console.WriteLine(ticker.Bid);       // Best bid
Console.WriteLine(ticker.Ask);       // Best ask
Console.WriteLine(ticker.Volume);    // 24h volume

// Multiple tickers (if supported)
var tickers = await exchange.FetchTickers(new[] { "BTC/USDT", "ETH/USDT" });

Fetching Order Book

// Full orderbook
var orderbook = await exchange.FetchOrderBook("BTC/USDT");
Console.WriteLine(orderbook.Bids[0]);  // [price, amount]
Console.WriteLine(orderbook.Asks[0]);  // [price, amount]

// Limited depth
var orderbook = await exchange.FetchOrderBook("BTC/USDT", 5);  // Top 5 levels

Creating Orders

Limit Order

// Buy limit order
var order = await exchange.CreateLimitBuyOrder("BTC/USDT", 0.01, 50000);
Console.WriteLine(order.Id);

// Sell limit order
var order = await exchange.CreateLimitSellOrder("BTC/USDT", 0.01, 60000);

// Generic limit order
var order = await exchange.CreateOrder("BTC/USDT", "limit", "buy", 0.01, 50000);

Market Order

// Buy market order
var order = await exchange.CreateMarketBuyOrder("BTC/USDT", 0.01);

// Sell market order
var order = await exchange.CreateMarketSellOrder("BTC/USDT", 0.01);

// Generic market order
var order = await exchange.CreateOrder("BTC/USDT", "market", "sell", 0.01);

Fetching Balance

var balance = await exchange.FetchBalance();
Console.WriteLine(balance["BTC"].Free);   // Available balance
Console.WriteLine(balance["BTC"].Used);   // Balance in orders
Console.WriteLine(balance["BTC"].Total);  // Total balance

Fetching Orders

// Open orders
var openOrders = await exchange.FetchOpenOrders("BTC/USDT");

// Closed orders
var closedOrders = await exchange.FetchClosedOrders("BTC/USDT");

// All orders (open + closed)
var allOrders = await exchange.FetchOrders("BTC/USDT");

// Single order by ID
var order = await exchange.FetchOrder(orderId, "BTC/USDT");

Fetching Trades

// Recent public trades
var trades = await exchange.FetchTrades("BTC/USDT", limit: 10);

// Your trades (requires authentication)
var myTrades = await exchange.FetchMyTrades("BTC/USDT");

Canceling Orders

// Cancel single order
await exchange.CancelOrder(orderId, "BTC/USDT");

// Cancel all orders for a symbol
await exchange.CancelAllOrders("BTC/USDT");

WebSocket Operations (Real-time)

Watching Ticker (Live Price Updates)

using ccxt.pro;

var exchange = new Binance();
while (true)
{
    var ticker = await exchange.WatchTicker("BTC/USDT");
    Console.WriteLine($"Last: {ticker.Last}");
}
await exchange.Close();

Watching Order Book (Live Depth Updates)

var exchange = new Binance();
while (true)
{
    var orderbook = await exchange.WatchOrderBook("BTC/USDT");
    Console.WriteLine($"Best bid: {orderbook.Bids[0][0]}");
    Console.WriteLine($"Best ask: {orderbook.Asks[0][0]}");
}
await exchange.Close();

Watching Trades (Live Trade Stream)

var exchange = new Binance();
while (true)
{
    var trades = await exchange.WatchTrades("BTC/USDT");
    foreach (var trade in trades)
    {
        Console.WriteLine($"{trade.Price} {trade.Amount} {trade.Side}");
    }
}
await exchange.Close();

Watching Your Orders (Live Order Updates)

var exchange = new Binance
{
    ApiKey = "YOUR_API_KEY",
    Secret = "YOUR_SECRET"
};

while (true)
{
    var orders = await exchange.WatchOrders("BTC/USDT");
    foreach (var order in orders)
    {
        Console.WriteLine($"{order.Id} {order.Status} {order.Filled}");
    }
}
await exchange.Close();

Watching Balance (Live Balance Updates)

var exchange = new Binance
{
    ApiKey = "YOUR_API_KEY",
    Secret = "YOUR_SECRET"
};

while (true)
{
    var balance = await exchange.WatchBalance();
    Console.WriteLine($"BTC: {balance["BTC"].Total}");
}
await exchange.Close();

Watching Multiple Symbols

var exchange = new Binance();
var symbols = new[] { "BTC/USDT", "ETH/USDT", "SOL/USDT" };

while (true)
{
    var tickers = await exchange.WatchTickers(symbols);
    foreach (var kvp in tickers)
    {
        Console.WriteLine($"{kvp.Key}: {kvp.Value.Last}");
    }
}
await exchange.Close();

Complete Method Reference

Market Data Methods

Tickers & Prices

• fetchTicker(symbol)

  - Fetch ticker for one symbol

• fetchTickers([symbols])

  - Fetch multiple tickers at once

• fetchBidsAsks([symbols])

  - Fetch best bid/ask for multiple symbols

• fetchLastPrices([symbols])

  - Fetch last prices

• fetchMarkPrices([symbols])

  - Fetch mark prices (derivatives)

Order Books

• fetchOrderBook(symbol, limit)

  - Fetch order book

• fetchOrderBooks([symbols])

  - Fetch multiple order books

• fetchL2OrderBook(symbol)

  - Fetch level 2 order book

• fetchL3OrderBook(symbol)

  - Fetch level 3 order book (if supported)

Trades

• fetchTrades(symbol, since, limit)

  - Fetch public trades

• fetchMyTrades(symbol, since, limit)

  - Fetch your trades (auth required)

• fetchOrderTrades(orderId, symbol)

  - Fetch trades for specific order

OHLCV (Candlesticks)

• fetchOHLCV(symbol, timeframe, since, limit)

  - Fetch candlestick data

• fetchIndexOHLCV(symbol, timeframe)

  - Fetch index price OHLCV

• fetchMarkOHLCV(symbol, timeframe)

  - Fetch mark price OHLCV

• fetchPremiumIndexOHLCV(symbol, timeframe)

  - Fetch premium index OHLCV

Account & Balance

• fetchBalance()

  - Fetch account balance (auth required)

• fetchAccounts()

  - Fetch sub-accounts

• fetchLedger(code, since, limit)

  - Fetch ledger history

• fetchLedgerEntry(id, code)

  - Fetch specific ledger entry

• fetchTransactions(code, since, limit)

  - Fetch transactions

• fetchDeposits(code, since, limit)

  - Fetch deposit history

• fetchWithdrawals(code, since, limit)

  - Fetch withdrawal history

• fetchDepositsWithdrawals(code, since, limit)

  - Fetch both deposits and withdrawals

Trading Methods

Creating Orders

• createOrder(symbol, type, side, amount, price, params)

  - Create order (generic)

• createLimitOrder(symbol, side, amount, price)

  - Create limit order

• createMarketOrder(symbol, side, amount)

  - Create market order

• createLimitBuyOrder(symbol, amount, price)

  - Buy limit order

• createLimitSellOrder(symbol, amount, price)

  - Sell limit order

• createMarketBuyOrder(symbol, amount)

  - Buy market order

• createMarketSellOrder(symbol, amount)

  - Sell market order

• createMarketBuyOrderWithCost(symbol, cost)

  - Buy with specific cost

• createStopLimitOrder(symbol, side, amount, price, stopPrice)

  - Stop-limit order

• createStopMarketOrder(symbol, side, amount, stopPrice)

  - Stop-market order

• createStopLossOrder(symbol, side, amount, stopPrice)

  - Stop-loss order

• createTakeProfitOrder(symbol, side, amount, takeProfitPrice)

  - Take-profit order

• createTrailingAmountOrder(symbol, side, amount, trailingAmount)

  - Trailing stop

• createTrailingPercentOrder(symbol, side, amount, trailingPercent)

  - Trailing stop %

• createTriggerOrder(symbol, side, amount, triggerPrice)

  - Trigger order

• createPostOnlyOrder(symbol, side, amount, price)

  - Post-only order

• createReduceOnlyOrder(symbol, side, amount, price)

  - Reduce-only order

• createOrders([orders])

  - Create multiple orders at once

• createOrderWithTakeProfitAndStopLoss(symbol, type, side, amount, price, tpPrice, slPrice)

  - OCO order

Managing Orders

• fetchOrder(orderId, symbol)

  - Fetch single order

• fetchOrders(symbol, since, limit)

  - Fetch all orders

• fetchOpenOrders(symbol, since, limit)

  - Fetch open orders

• fetchClosedOrders(symbol, since, limit)

  - Fetch closed orders

• fetchCanceledOrders(symbol, since, limit)

  - Fetch canceled orders

• fetchOpenOrder(orderId, symbol)

  - Fetch specific open order

• fetchOrdersByStatus(status, symbol)

  - Fetch orders by status

• cancelOrder(orderId, symbol)

  - Cancel single order

• cancelOrders([orderIds], symbol)

  - Cancel multiple orders

• cancelAllOrders(symbol)

  - Cancel all orders for symbol

• editOrder(orderId, symbol, type, side, amount, price)

  - Modify order

Margin & Leverage

• fetchBorrowRate(code)

  - Fetch borrow rate for margin

• fetchBorrowRates([codes])

  - Fetch multiple borrow rates

• fetchBorrowRateHistory(code, since, limit)

  - Historical borrow rates

• fetchCrossBorrowRate(code)

  - Cross margin borrow rate

• fetchIsolatedBorrowRate(symbol, code)

  - Isolated margin borrow rate

• borrowMargin(code, amount, symbol)

  - Borrow margin

• repayMargin(code, amount, symbol)

  - Repay margin

• fetchLeverage(symbol)

  - Fetch leverage

• setLeverage(leverage, symbol)

  - Set leverage

• fetchLeverageTiers(symbols)

  - Fetch leverage tiers

• fetchMarketLeverageTiers(symbol)

  - Leverage tiers for market

• setMarginMode(marginMode, symbol)

  - Set margin mode (cross/isolated)

• fetchMarginMode(symbol)

  - Fetch margin mode

Derivatives & Futures

Positions

• fetchPosition(symbol)

  - Fetch single position

• fetchPositions([symbols])

  - Fetch all positions

• fetchPositionsForSymbol(symbol)

  - Fetch positions for symbol

• fetchPositionHistory(symbol, since, limit)

  - Position history

• fetchPositionsHistory(symbols, since, limit)

  - Multiple position history

• fetchPositionMode(symbol)

  - Fetch position mode (one-way/hedge)

• setPositionMode(hedged, symbol)

  - Set position mode

• closePosition(symbol, side)

  - Close position

• closeAllPositions()

  - Close all positions

Funding & Settlement

• fetchFundingRate(symbol)

  - Current funding rate

• fetchFundingRates([symbols])

  - Multiple funding rates

• fetchFundingRateHistory(symbol, since, limit)

  - Funding rate history

• fetchFundingHistory(symbol, since, limit)

  - Your funding payments

• fetchFundingInterval(symbol)

  - Funding interval

• fetchSettlementHistory(symbol, since, limit)

  - Settlement history

• fetchMySettlementHistory(symbol, since, limit)

  - Your settlement history

Open Interest & Liquidations

• fetchOpenInterest(symbol)

  - Open interest for symbol

• fetchOpenInterests([symbols])

  - Multiple open interests

• fetchOpenInterestHistory(symbol, timeframe, since, limit)

  - OI history

• fetchLiquidations(symbol, since, limit)

  - Public liquidations

• fetchMyLiquidations(symbol, since, limit)

  - Your liquidations

Options

• fetchOption(symbol)

  - Fetch option info

• fetchOptionChain(code)

  - Fetch option chain

• fetchGreeks(symbol)

  - Fetch option greeks

• fetchVolatilityHistory(code, since, limit)

  - Volatility history

• fetchUnderlyingAssets()

  - Fetch underlying assets

Fees & Limits

• fetchTradingFee(symbol)

  - Trading fee for symbol

• fetchTradingFees([symbols])

  - Trading fees for multiple symbols

• fetchTradingLimits([symbols])

  - Trading limits

• fetchTransactionFee(code)

  - Transaction/withdrawal fee

• fetchTransactionFees([codes])

  - Multiple transaction fees

• fetchDepositWithdrawFee(code)

  - Deposit/withdrawal fee

• fetchDepositWithdrawFees([codes])

  - Multiple deposit/withdraw fees

Deposits & Withdrawals

• fetchDepositAddress(code, params)

  - Get deposit address

• fetchDepositAddresses([codes])

  - Multiple deposit addresses

• fetchDepositAddressesByNetwork(code)

  - Addresses by network

• createDepositAddress(code, params)

  - Create new deposit address

• fetchDeposit(id, code)

  - Fetch single deposit

• fetchWithdrawal(id, code)

  - Fetch single withdrawal

• fetchWithdrawAddresses(code)

  - Fetch withdrawal addresses

• fetchWithdrawalWhitelist(code)

  - Fetch whitelist

• withdraw(code, amount, address, tag, params)

  - Withdraw funds

• deposit(code, amount, params)

  - Deposit funds (if supported)

Transfer & Convert

• transfer(code, amount, fromAccount, toAccount)

  - Internal transfer

• fetchTransfer(id, code)

  - Fetch transfer info

• fetchTransfers(code, since, limit)

  - Fetch transfer history

• fetchConvertCurrencies()

  - Currencies available for convert

• fetchConvertQuote(fromCode, toCode, amount)

  - Get conversion quote

• createConvertTrade(fromCode, toCode, amount)

  - Execute conversion

• fetchConvertTrade(id)

  - Fetch convert trade

• fetchConvertTradeHistory(code, since, limit)

  - Convert history

Market Info

• fetchMarkets()

  - Fetch all markets

• fetchCurrencies()

  - Fetch all currencies

• fetchTime()

  - Fetch exchange server time

• fetchStatus()

  - Fetch exchange status

• fetchBorrowInterest(code, symbol, since, limit)

  - Borrow interest paid

• fetchLongShortRatio(symbol, timeframe, since, limit)

  - Long/short ratio

• fetchLongShortRatioHistory(symbol, timeframe, since, limit)

  - L/S ratio history

WebSocket Methods (ccxt.pro)

All REST methods have WebSocket equivalents with

watch*

Real-time Market Data

• watchTicker(symbol)

  - Watch single ticker

• watchTickers([symbols])

  - Watch multiple tickers

• watchOrderBook(symbol)

  - Watch order book updates

• watchOrderBookForSymbols([symbols])

  - Watch multiple order books

• watchTrades(symbol)

  - Watch public trades

• watchOHLCV(symbol, timeframe)

  - Watch candlestick updates

• watchBidsAsks([symbols])

  - Watch best bid/ask

Real-time Account Data (Auth Required)

• watchBalance()

  - Watch balance updates

• watchOrders(symbol)

  - Watch your order updates

• watchMyTrades(symbol)

  - Watch your trade updates

• watchPositions([symbols])

  - Watch position updates

• watchPositionsForSymbol(symbol)

  - Watch positions for symbol

Authentication Required

Methods marked with 🔒 require API credentials:

• All

  create*

  methods (creating orders, addresses)
• All

  cancel*

  methods (canceling orders)
• All

  edit*

  methods (modifying orders)
• All

  fetchMy*

  methods (your trades, orders)

• fetchBalance

  ,

  fetchLedger

  ,

  fetchAccounts

• withdraw

  ,

  transfer

  ,

  deposit

• Margin/leverage methods
• Position methods

• watchBalance

  ,

  watchOrders

  ,

  watchMyTrades

  ,

  watchPositions

Checking Method Availability

Not all exchanges support all methods. Check before using:

// Check if method is supported
if (exchange.has['fetchOHLCV']) {
    const candles = await exchange.fetchOHLCV('BTC/USDT', '1h')
}

// Check multiple capabilities
console.log(exchange.has)
// {
//   fetchTicker: true,
//   fetchOHLCV: true,
//   fetchMyTrades: true,
//   fetchPositions: false,
//   ...
// }

Method Naming Convention

• fetch*

  - REST API methods (HTTP requests)

• watch*

  - WebSocket methods (real-time streams)

• create*

  - Create new resources (orders, addresses)

• cancel*

  - Cancel existing resources

• edit*

  - Modify existing resources

• set*

  - Configure settings (leverage, margin mode)

• *Ws

  suffix - WebSocket variant (some exchanges)

Proxy Configuration

CCXT supports HTTP, HTTPS, and SOCKS proxies for both REST and WebSocket connections.

Setting Proxy

// HTTP Proxy
exchange.httpProxy = 'http://your-proxy-host:port'

// HTTPS Proxy  
exchange.httpsProxy = 'https://your-proxy-host:port'

// SOCKS Proxy
exchange.socksProxy = 'socks://your-proxy-host:port'

// Proxy with authentication
exchange.httpProxy = 'http://user:pass@proxy-host:port'

Proxy for WebSocket

WebSocket connections also respect proxy settings:

exchange.httpsProxy = 'https://proxy:8080'
// WebSocket connections will use this proxy

Testing Proxy Connection

exchange.httpProxy = 'http://localhost:8080'
try {
    await exchange.fetchTicker('BTC/USDT')
    console.log('Proxy working!')
} catch (error) {
    console.error('Proxy connection failed:', error)
}

WebSocket-Specific Methods

Some exchanges provide WebSocket variants of REST methods for faster order placement and management. These use the

*Ws

Trading via WebSocket

Creating Orders:

• createOrderWs

  - Create order via WebSocket (faster than REST)

• createLimitOrderWs

  - Create limit order via WebSocket

• createMarketOrderWs

  - Create market order via WebSocket

• createLimitBuyOrderWs

  - Buy limit order via WebSocket

• createLimitSellOrderWs

  - Sell limit order via WebSocket

• createMarketBuyOrderWs

  - Buy market order via WebSocket

• createMarketSellOrderWs

  - Sell market order via WebSocket

• createStopLimitOrderWs

  - Stop-limit order via WebSocket

• createStopMarketOrderWs

  - Stop-market order via WebSocket

• createStopLossOrderWs

  - Stop-loss order via WebSocket

• createTakeProfitOrderWs

  - Take-profit order via WebSocket

• createTrailingAmountOrderWs

  - Trailing stop via WebSocket

• createTrailingPercentOrderWs

  - Trailing stop % via WebSocket

• createPostOnlyOrderWs

  - Post-only order via WebSocket

• createReduceOnlyOrderWs

  - Reduce-only order via WebSocket

Managing Orders:

• editOrderWs

  - Edit order via WebSocket

• cancelOrderWs

  - Cancel order via WebSocket (faster than REST)

• cancelOrdersWs

  - Cancel multiple orders via WebSocket

• cancelAllOrdersWs

  - Cancel all orders via WebSocket

Fetching Data:

• fetchOrderWs

  - Fetch order via WebSocket

• fetchOrdersWs

  - Fetch orders via WebSocket

• fetchOpenOrdersWs

  - Fetch open orders via WebSocket

• fetchClosedOrdersWs

  - Fetch closed orders via WebSocket

• fetchMyTradesWs

  - Fetch your trades via WebSocket

• fetchBalanceWs

  - Fetch balance via WebSocket

• fetchPositionWs

  - Fetch position via WebSocket

• fetchPositionsWs

  - Fetch positions via WebSocket

• fetchPositionsForSymbolWs

  - Fetch positions for symbol via WebSocket

• fetchTradingFeesWs

  - Fetch trading fees via WebSocket

When to Use WebSocket Methods

Use

*Ws

• You need faster order placement (lower latency)
• You're already connected via WebSocket
• You want to reduce REST API rate limit usage
• Trading strategies require sub-100ms latency

Use REST methods when:

• You need guaranteed execution confirmation
• You're making one-off requests
• The exchange doesn't support the WebSocket variant
• You need detailed error responses

Example: Order Placement Comparison

REST API (slower, more reliable):

const order = await exchange.createOrder('BTC/USDT', 'limit', 'buy', 0.01, 50000)

WebSocket API (faster, lower latency):

const order = await exchange.createOrderWs('BTC/USDT', 'limit', 'buy', 0.01, 50000)

Checking WebSocket Method Availability

Not all exchanges support WebSocket trading methods:

if (exchange.has['createOrderWs']) {
    // Exchange supports WebSocket order creation
    const order = await exchange.createOrderWs('BTC/USDT', 'limit', 'buy', 0.01, 50000)
} else {
    // Fall back to REST
    const order = await exchange.createOrder('BTC/USDT', 'limit', 'buy', 0.01, 50000)
}

Authentication

Setting API Keys

using System;

// During instantiation (recommended)
var exchange = new Binance
{
    ApiKey = Environment.GetEnvironmentVariable("BINANCE_API_KEY"),
    Secret = Environment.GetEnvironmentVariable("BINANCE_SECRET"),
    EnableRateLimit = true
};

// After instantiation
exchange.ApiKey = Environment.GetEnvironmentVariable("BINANCE_API_KEY");
exchange.Secret = Environment.GetEnvironmentVariable("BINANCE_SECRET");

Testing Authentication

try
{
    var balance = await exchange.FetchBalance();
    Console.WriteLine("Authentication successful!");
}
catch (AuthenticationError)
{
    Console.WriteLine("Invalid API credentials");
}

Error Handling

Exception Hierarchy

BaseError
├─ NetworkError (recoverable - retry)
│  ├─ RequestTimeout
│  ├─ ExchangeNotAvailable
│  ├─ RateLimitExceeded
│  └─ DDoSProtection
└─ ExchangeError (non-recoverable - don't retry)
   ├─ AuthenticationError
   ├─ InsufficientFunds
   ├─ InvalidOrder
   └─ NotSupported

Basic Error Handling

using ccxt;

try
{
    var ticker = await exchange.FetchTicker("BTC/USDT");
}
catch (NetworkError ex)
{
    Console.WriteLine($"Network error - retry: {ex.Message}");
}
catch (ExchangeError ex)
{
    Console.WriteLine($"Exchange error - do not retry: {ex.Message}");
}
catch (Exception ex)
{
    Console.WriteLine($"Unknown error: {ex.Message}");
}

Specific Exception Handling

try
{
    var order = await exchange.CreateOrder("BTC/USDT", "limit", "buy", 0.01, 50000);
}
catch (InsufficientFunds)
{
    Console.WriteLine("Not enough balance");
}
catch (InvalidOrder)
{
    Console.WriteLine("Invalid order parameters");
}
catch (RateLimitExceeded)
{
    Console.WriteLine("Rate limit hit - wait before retrying");
    await Task.Delay(1000);  // Wait 1 second
}
catch (AuthenticationError)
{
    Console.WriteLine("Check your API credentials");
}

Retry Logic for Network Errors

async Task<Ticker> FetchWithRetry(int maxRetries = 3)
{
    for (int i = 0; i < maxRetries; i++)
    {
        try
        {
            return await exchange.FetchTicker("BTC/USDT");
        }
        catch (NetworkError)
        {
            if (i < maxRetries - 1)
            {
                Console.WriteLine($"Retry {i + 1}/{maxRetries}");
                await Task.Delay(1000 * (i + 1));  // Exponential backoff
            }
            else
            {
                throw;
            }
        }
    }
    return null;
}

Rate Limiting

Built-in Rate Limiter (Recommended)

var exchange = new Binance
{
    EnableRateLimit = true  // Automatically throttles requests
};

Manual Delays

await exchange.FetchTicker("BTC/USDT");
await Task.Delay((int)exchange.RateLimit);  // Wait between requests
await exchange.FetchTicker("ETH/USDT");

Checking Rate Limit

Console.WriteLine(exchange.RateLimit);  // Milliseconds between requests

Common Pitfalls

Wrong Method Casing

// Wrong - lowercase (JavaScript style)
var ticker = await exchange.fetchTicker("BTC/USDT");  // ERROR!

// Correct - PascalCase (C# style)
var ticker = await exchange.FetchTicker("BTC/USDT");

Not Awaiting Async Methods

// Wrong - missing await
var ticker = exchange.FetchTicker("BTC/USDT");  // Returns Task, not Ticker!
Console.WriteLine(ticker.Last);  // ERROR!

// Correct
var ticker = await exchange.FetchTicker("BTC/USDT");
Console.WriteLine(ticker.Last);  // Works!

Using REST for Real-time Monitoring

// Wrong - wastes rate limits
while (true)
{
    var ticker = await exchange.FetchTicker("BTC/USDT");  // REST
    Console.WriteLine(ticker.Last);
    await Task.Delay(1000);
}

// Correct - use WebSocket
using ccxt.pro;
var exchange = new Binance();
while (true)
{
    var ticker = await exchange.WatchTicker("BTC/USDT");  // WebSocket
    Console.WriteLine(ticker.Last);
}

Not Closing WebSocket Connections

// Wrong - memory leak
var exchange = new ccxt.pro.Binance();
var ticker = await exchange.WatchTicker("BTC/USDT");
// Forgot to close!

// Correct
var exchange = new ccxt.pro.Binance();
try
{
    while (true)
    {
        var ticker = await exchange.WatchTicker("BTC/USDT");
        Console.WriteLine(ticker.Last);
    }
}
finally
{
    await exchange.Close();
}

Incorrect Symbol Format

// Wrong symbol formats
"BTCUSDT"    // Wrong - no separator
"BTC-USDT"   // Wrong - dash separator
"btc/usdt"   // Wrong - lowercase

// Correct symbol format
"BTC/USDT"   // Unified CCXT format

Troubleshooting

Common Issues

1. "Package CCXT.NET not found"

• Solution: Run

  dotnet add package CCXT.NET

2. "RateLimitExceeded"

• Solution: Set

  EnableRateLimit = true

3. "AuthenticationError"

• Solution: Check API key and secret
• Verify API key permissions on exchange
• Check system clock is synced

4. "InvalidNonce"

• Solution: Sync system clock
• Use only one exchange instance per API key

5. "InsufficientFunds"

• Solution: Check available balance (

  balance["BTC"].Free

  )
• Account for trading fees

6. "ExchangeNotAvailable"

• Solution: Check exchange status/maintenance
• Retry after a delay

Debugging

// Enable verbose logging
exchange.Verbose = true;

// Check exchange capabilities
Console.WriteLine(exchange.Has);
// {
//   FetchTicker = true,
//   FetchOrderBook = true,
//   CreateOrder = true,
//   ...
// }

// Check market information
var market = exchange.Markets["BTC/USDT"];

// Check last request/response
Console.WriteLine(exchange.LastHttpResponse);
Console.WriteLine(exchange.LastJsonResponse);

Learn More

• CCXT Manual
• CCXT Pro Documentation
• Supported Exchanges
• GitHub Repository