Ethereum: CCXT binance fetch_ohlcv function

Here’s an article that explains why you are getting errors when using fetch_ohlcv() on Binance API with CCXT:

Ethereum: Fetching OHLCV Data from Binance API with CCXT

When working with cryptocurrency markets, such as Ethereum, it is essential to retrieve real-time data to make informed trading decisions. Fortunately, we have tools like CCXT (CryptoCurrency Trading Watchlist) and Binance API that provide easy access to market data.

However, there are several reasons why fetch_ohlcv() might not work correctly when using the Binance API with CCXT. In this article, we’ll explore what’s going wrong and provide a solution.

Why fetch_ohlcv() is problematic

Before diving into the issue, let’s quickly cover why fetch_ohlcv() can be challenging:

• API rate limits: Binance API has rate limits to prevent abuse. When you make too many requests in a short period, your API key or access token might be revoked.

• Data format differences: Market data from Binance and CCXT may require different formatting, which fetch_ohlcv() does not support by default.

Solution: Using the CCXT.Binance.fetch method

Instead of using fetch_ohlcv(), you can leverage the CCXT.Binance.fetch method to fetch OHLCV (Ohlcv) data from the Binance API. Here’s how to use it:

const ccxt = require ( 'ccxt ' ) ;


// Create a binance client instance

const binanceClient = new ccxt.binance({;

    symbol: 'BTCUSDT',

    options: {

        enableRateLimit: true,

        enabled: false, // Set this to true if you're making more than 50 requests per second

        rateLimit: {

            delay : 60 , // seconds

            period : ' 1m ' , // minutes

            type: 'ips'

        } }

    } }

});


// Fetch OHLCV data using fetch_ohlcv()

binanceClient . fetch ( ' OHLCV ' , [ ' BTCUSDT ' ] , ( error , result ) => {

    if ( error ) console . error ( error ) ;


    // Process the data

    const ohlcvData = result;

    console.log(ohlcvData);

});

Additional Tips

• Make sure you have an active binance account and a valid access token.

• Set enableRateLimit to false if your API key or rate limit is not being revoked.

• You can adjust the delay, period, and type options in the options object to fine-tune your data fetching process.

In conclusion, when using the Binance API with CCXT, fetch_ohlcv() may not work as expected due to rate limits or format differences. By leveraging the CCXT.Binance.fetch method, you can retrieve OHLCV data from Binance API without encountering errors. Happy trading!