<br /> Harvest is a simple yet flexible Python framework for algorithmic trading. Paper trade and live trade stocks, cryptos, and options![^1][^2] Visit here for tutorials and documentation.

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⚠️WARNING⚠️ Harvest is currently at v0.3. The program is unstable and contains many bugs. Use with caution, and contributions are greatly appreciated.

• 🪲 File a bug report
• 💡 Submit a feature suggestion
• 📝 Request documentation

See for yourself!

The example below is an algorithm to trade Twitter stocks using the moving average crossover strategy.

from harvest.algo import *
from harvest.trader import *

class Watch(BaseAlgo):
    def config(self):
        self.watchlist = ["TWTR"]
        self.interval = "5MIN"

    def main(self):
        sma_long = self.sma(period=50)
        sma_short = self.sma(period=20)
        if self.crossover(sma_long, sma_short):
            self.buy()
        elif self.crossover(sma_short, sma_long):
            self.sell()

To paper trade using this algorithm, run the following command:

harvest start -s yahoo -b paper

To live trade using Robinhood, run:

harvest start -s robinhood -b robinhood

With Harvest, the process of testing and deploying your strategies is a piece of cake 🍰

Installation

The only requirement is to have Python 3.12 or newer.

Once you're ready, install uv. If you want the Harvest CLI available on your machine, install it with:

uv tool install harvest-python

If you are adding Harvest to another Python project, use:

uv add harvest-python

Next, install the dependencies necessary for the brokerage of your choice:

uv add 'harvest-python[BROKER]'

Replace BROKER with a brokerage/data source of your choice in lowercase:

• Robinhood
• Alpaca
• Webull
• Kraken
• Polygon

If you installed Harvest as a tool, you can run commands directly:

harvest start -s yahoo -b paper

If you added Harvest to a project, run commands with uv run, for example:

uv run harvest start -s yahoo -b paper

Now you're all set.

Contributing

Contributions are greatly appreciated. Check out the CONTRIBUTING document for details, and ABOUT for the long-term goals of this project.

Disclaimer

• Harvest is not officially associated with Robinhood, Alpaca, Webull, Kraken, Polygon, or Yahoo.
• Many of the brokers were also not designed to be used for algo-trading. Excessive access to their API can result in your account getting locked.
• Tutorials and documentation solely exist to provide technical references of the code. They are not recommendations of any specific securities or strategies.
• Use Harvest at your own responsibility. Developers of Harvest take no responsibility for any financial losses you incur by using Harvest. By using Harvest, you certify you understand that Harvest is a software in early development and may contain bugs and unexpected behaviors.

Linter

• Trunk is a wrapper around linters. see trunk.yaml for details on which linters are enabled
• Currently we run ruff which supports isort, pylint, black
• For the best experience, please install the proper extensions under vscode "recommended extensions"
• To run lint checks manually, use trunk check, to run formatters, use trunk fmt
• To run lint & format checks automatically, install the extensions recommended and save

[^1]: What assets you can trade depends on the broker you are using. [^2]: Backtesting is also available, but it is not supported for options.