Locally Backtesting Algorithmic Trading Strategies - LEAN CLI

[@thetagang6854]

When I run " lean backtest 'test project' " , I see: Pulling quantconnect/lean:latest... latest: Pulling from quantconnect/lean Then a series of numbers with text :waiting, and download bar that glitches, and nothing else happens. Any idea?

[@varadkabade6220]

Hi Theta Gang, Would you please open a thread in the community forum with the complete logs? Can you reproduce the issue with a simple buy-and-hold algorithm? Best, Varad Kabade

[@bengreen6674]

How do you view the detailed backtest once completed? Is it saved as a notebook or something?

[@Quantconnect]

It should be in a json file in a results folder under your project. You can view it in a local chart with the LEAN GUI plugin!

[@noufbouf]

What happens if you try to local back test a Strategy that requires data that are NOT downloaded already ? Thank you

[@Quantconnect]

LEAN will backtest over whatever data is there, and if none there it'll show warnings and the algorithm won't get the data. We provide other CLI methods to download the data but we have to pay the vendors that provide it so it comes with a small fee. The base for US is $600/year for the corporate actions dataset then only the specific ticker-dates you need after that.