Stream Processing: A Critical Component of MLOps for ML-Based Trading Bots


K1 in MLOps

May 13, 2023

Automated trading bots are becoming increasingly popular in the financial markets, with machine learning (ML) algorithms powering many of these bots to make more accurate predictions and decisions based on patterns and trends in market data. However, for ML-based trading bots to be effective, they must be able to process large volumes of real-time market data quickly and accurately. This is where stream processing comes in.

What is Stream Processing?

Stream processing is the continuous processing of data in motion, as it is generated and in real-time. It allows for the processing of data as it is generated, enabling real-time analysis of market data such as stock prices, exchange rates, news articles, and social media feeds. This provides up-to-date information on market trends, news events, and other factors that may affect trading decisions.


Why is Stream Processing Important for ML-Based Trading Bots?

In ML-based trading bots, stream processing enables continuous analysis of real-time market data, which is essential for making trading decisions based on up-to-date information. By using stream processing, trading bots can quickly identify patterns and anomalies in market data, enabling them to make more accurate predictions about future market conditions. This is particularly important in high-frequency trading, where trades are executed rapidly based on real-time market data.


How Does Stream Processing Support MLOps for Trading Bots?

MLOps involves the deployment and monitoring of ML models to make automated trading decisions. Stream processing plays a critical role in MLOps for trading bots, enabling real-time data analysis to support automated trading decisions. Furthermore, stream processing enables ML algorithms to receive large amounts of training data in real-time, allowing them to continuously learn and adapt to changing market conditions. This can help to reduce latency in trading decisions, leading to faster and more accurate trading results.


Stream Processing with Faust in Python

Our team (1DES) utilized the Faust library in Python to implement stream processing for cryptocurrency market data. Faust is a popular open-source library for stream processing that offers high throughput, low latency, and fault-tolerance. Faust is built on top of Apache Kafka, a distributed streaming platform, and uses Apache ZooKeeper for coordination and management of Kafka brokers.


To use Faust for stream processing, we created a Faust application that consumed OHLCV (Open, High, Low, Close, Volume) cryptocurrency market data from a Kafka topic. We then performed real-time processing on this data to create features and generate trading signals based on the output of our ML models.

Using Faust allowed us to easily scale our stream processing pipeline by adding more workers to process the incoming data in parallel. Additionally, Faust provides built-in support for failure recovery, ensuring that our stream processing application continued to function even in the event of a worker failure or other unexpected issue.



Stream processing is a critical component of creating effective ML-based trading bots. By enabling bots to quickly and accurately process vast amounts of market data, identify patterns and anomalies, and adapt to changing market conditions in real-time, stream processing can help to improve the accuracy and effectiveness of trading decisions, leading to better trading results. Additionally, stream processing plays a crucial role in the flow of data collection, feature creation, and model training for ML-based trading bots, enabling the continuous flow of real-time data required for effective trading decisions.


In 1DES, we utilized Faust in Python to implement stream processing for cryptocurrency market data. By leveraging Faust's high throughput, low latency, and fault-tolerance capabilities, we were able to create a scalable and robust stream processing pipeline for our ML-based trading bot. The use of Apache Kafka and ZooKeeper provided a reliable and distributed infrastructure for our stream processing application.


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