A stock trading bot powered by Trump tweets
Latest commit 7e64bf8 Feb 22, 2017 @maxbbraun Re-run benchmark.



This bot watches Donald Trump's tweets and waits for him to mention any publicly traded companies. When he does, it uses sentiment analysis to determine whether his opinions are positive or negative toward those companies. The bot then automatically executes trades on the relevant stocks according to the expected market reaction. It also tweets out a summary of its findings in real time at @Trump2Cash.

You can read more about the background story here.


The code is written in Python and is meant to run on a Google Compute Engine instance. It uses the Twitter Streaming APIs to get notified whenever Trump tweets. The entity detection and sentiment analysis is done using Google's Cloud Natural Language API and the Wikidata Query Service provides the company data. The TradeKing API does the stock trading.

The main module defines a callback where incoming tweets are handled and starts streaming Trump's feed:

def twitter_callback(tweet):
    companies = analysis.find_companies(tweet)
    if companies:
        twitter.tweet(companies, tweet)

if __name__ == "__main__":

The core algorithms are implemented in the analysis and trading modules. The former finds mentions of companies in the text of the tweet, figures out what their ticker symbol is, and assigns a sentiment score to them. The latter chooses a trading strategy, which is either buy now and sell at close or sell short now and buy to cover at close. The twitter module deals with streaming and tweeting out the summary.

Follow these steps to run the code yourself:

1. Create VM instance

Check out the quickstart to create a Cloud Platform project and a Linux VM instance with Compute Engine, then SSH into it for the steps below. The predefined machine type g1-small (1 vCPU, 1.7 GB memory) seems to work well.

2. Set up auth

The authentication keys for the different APIs are read from shell environment variables. Each service has different steps to obtain them.


Log in to your Twitter account and create a new application. Under the Keys and Access Tokens tab for your app you'll find the Consumer Key and Consumer Secret. Export both to environment variables:


If you want the tweets to come from the same account that owns the application, simply use the Access Token and Access Token Secret on the same page. If you want to tweet from a different account, follow the steps to obtain an access token. Then export both to environment variables:



Follow the Google Application Default Credentials instructions to create, download, and export a service account key.

export GOOGLE_APPLICATION_CREDENTIALS="/path/to/credentials-file.json"

You also need to enable the Cloud Natural Language API for your Google Cloud Platform project.


Log in to your TradeKing account and create a new application. Behind the Details button for your application you'll find the Consumer Key, Consumer Secret, OAuth (Access) Token, and Oauth (Access) Token Secret. Export them all to environment variables:


Also export your TradeKing account number, which you'll find under My Accounts:


3. Install dependencies

There are a few library dependencies, which you can install using pip:

$ pip install -r requirements.txt

4. Run the tests

Verify that everything is working as intended by running the tests with pytest using this command:

$ export USE_REAL_MONEY=NO && pytest *.py --verbose

5. Run the benchmark

The benchmark report shows how the current implementation of the analysis and trading algorithms would have performed against historical data. You can run it again to benchmark any changes you may have made:

$ ./benchmark.py > benchmark.md

6. Start the bot

Enable real orders that use your money:


Have the code start running in the background with this command:

$ nohup ./main.py &


Copyright 2017 Max Braun

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at


Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.