Lumibot - A Backtesting and Trading Library for Stocks, Options, Crypto, Futures, FOREX and More!

Lumibot is a backtesting and trading library for stocks, options, crypto, futures and more. It is made so that the same code you use for backtesting can be used for live trading, making it easy to transition from backtesting to live trading. Lumibot is a highly flexible library that allows you to create your own strategies and indicators, and backtest them on historical data. It is also highly optimized for speed, so you can backtest your strategies quickly and efficiently.

IMPORTANT: This library requires data for backtesting. The recommended data source is Polygon.io (a free tier is available too). Please click the link to give us credit for the sale, it helps support this project. You can use the coupon code 'LUMI10' for 10% off.

Documentation - 👇 Start Here 👇

To get started with Lumibot, you can check out our documentation below.

Check out the documentation for the project here: 👉 http://lumibot.lumiwealth.com/ 👈

Blog

Our blog has lots of example strategies and shows you how to run a bot using LumiBot. Check the blog out here:

https://lumiwealth.com/blog/

Run a backtest

To run a backtest, you can use the following code snippet:

python -m lumibot.example_strategies.stock_buy_and_hold

Run an Example Strategy

We made a small example strategy to show you how to use Lumibot in this GitHub repository: Example Algorithm GitHub

To run this example strategy, click on the Deploy to Render button below to deploy the strategy to Render (our recommendation). You can also run the strategy on Repl.it by clicking on the Run on Repl.it button below.

For more information on this example strategy, you can check out the README in the example strategy repository here: Example Algorithm

Contributors

If you want to contribute to Lumibot, you can check how to get started below. We are always looking for contributors to help us out!

Steps to contribute:

1. Clone the repository to your local machine
2. Create a new branch for your feature
3. Run pip install -r requirements_dev.txt to install the developer dependencies
4. Install all the requirements from setup.py: pip install -e .
5. Make your changes
6. Run pytest to make sure all the tests pass
7. Create a pull request to merge your branch into master

Running Tests

We use pytest for our testing framework. Some tests require API keys to be in a .env file in the root directory. To run the tests, you can run the following command:

pytest

To run an individual test file, you can run the following command:

pytest tests/test_asset.py

Showing Code Coverage

To show code coverage, you can run the following command:

coverage run; coverage report; coverage html

Adding an Alias on Linux or MacOS

This will show you the code coverage in the terminal and also create a folder called "htmlcov" which will have a file called "index.html". You can open this file in your browser to see the code coverage in a more readable format.

If you don't want to keep typing out the command, you can add it as an alias in bash. To do this, you can run the following command:

alias cover='coverage run; coverage report; coverage html'

This will now allow you to run the command by just typing "cover" in the terminal.

cover

If you want to also add it to your .bashrc file. You can do this by running the following command:

echo "alias cover='coverage run; coverage report; coverage html'" >> ~/.bashrc

Adding an Alias on Windows

If you are on Windows, you can add an alias by running the following command:

Add to your PowerShell Profile: (profile.ps1)

function cover { 
 coverage run
 coverage report
 coverage html
}

Setting Up PyTest in VS Code

To set up in VS Code for debugging, you can add the following to your launch.json file under "configurations". This will allow you to go into "Run and Debug" and run the tests from there, with breakpoints and everything.

NOTE: You may need to change args to the path of your tests folder.

{
    "name": "Python: Pytest",
    "type": "python",
    "request": "launch",
    "module": "pytest",
    "args": [
        "lumibot/tests"
    ],
    "console": "integratedTerminal",
}

Here's an example of an actual launch.json file:

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Python: Pytest",
            "type": "python",
            "request": "launch",
            "module": "pytest",
            "args": [
                "lumibot/tests"
            ],
            "console": "integratedTerminal",
        }
    ]
}

Notes on data sources

This table points out some of the differences between the data sources we use in Lumibot. These refer to the data returned in a Bars entity that is returned from calls to get_historical_prices.

data_source	type	OHLCV	split adjusted	dividends	returns	dividend adjusted returns
yahoo	stock	Yes	Yes	Yes	Yes	Yes
alpaca	stock	Yes	Yes	No	Yes	No
polygon	stock	Yes	Yes	No	Yes	No
Tradier	stock	Yes	Yes	No	Yes	No
Pandas*	stock	Yes	Yes	Yes	Yes	Yes

*Pandas is not a data source per se, but it can load csv files in the same format as Yahoo dataframes, which can contain dividends.

An assortment of git commands our contributors may find useful

Making a new branch and pulling from main:

git checkout -b my-feature
git fetch origin
git merge origin/dev

Committing work to you feature branch:

git add .
git commit -m "my changes"
git push -u origin my-feature

If work on main progressed while you were in another branch, this is how you rebase it into your branch. Note that since you've rebased your local branch, you'll need to force push your changes to update the remote branch. The --force-with-lease option is a safer alternative to --force as it will abort the push if there are any new commits on the remote that you haven't incorporated into your local branch

git checkout dev
git fetch origin
git merge origin/dev
git checkout my-feature
git rebase dev
git checkout my-feature
git push --force-with-lease origin my-feature

When ready to merge the branch into main, go into github, create a pull request, and await review. When your PR is approved it will automatically be merged into the dev branch remotely. Now, you can delete your local branch and the remote branch.

git checkout dev
git fetch origin
git merge origin/dev
git branch -D my-feature
git push origin --delete my-feature

Community

If you want to learn more about Lumibot or Algorithmic Trading then you will love out communities! You can join us on Discord.

Join us on Discord: https://discord.gg/TmMsJCKY3T

Courses

If you need extra help building your algorithm, we have courses to help you out.

For our Algorithmic Trading course: https://lumiwealth.com/algorithmic-trading-landing-page

For our Machine Learning for Trading course: https://www.lumiwealth.com/product-category/machine-learning-purchase/

For our Options Trading course: https://www.lumiwealth.com/product-category/options-trading-purchase/

License

This library is covered by the MIT license for open sourced software which can be found here: https://github.com/Lumiwealth/lumibot/blob/master/LICENSE