QUANTCONNECT COMMUNITY
Hi;
I understand that I can use `lean data download` to pull down the data I need to run backtests locally.
But… how do I know what data my algo needs? Is there a way to get that listed?
Or should I run `lean backtest "My Project" --download-data` and it will then pull down what is needed? And in this case, does it pull down complete sets of what's needed, and keep it local so it does not need to be copied down again?
thanks - dave
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Fred Painchaud
Hi David,
1- You need to download the data but you will also need to pay for it. The QC data is licensed to be used in the web exclusively, as-is. For access outside of it, you need to pay additional.
LEAN CLI will guide you to the payment, etc.
2- You cannot have access to Universe Selection data outside of the web (cloud). So there's that. Since you then do not use Universe Selection, you select a fixed set of assets to trade. So you know them in advance. You also know your backtest start and end dates in advance. You also know your resolution in advance for your assets. So you know in advance all the information needed to select the data you need, such as AAPL, all 2018, minute data.
Fred
David Thielen
The material on this website is provided for informational purposes only and does not constitute an offer to sell, a solicitation to buy, or a recommendation or endorsement for any security or strategy, nor does it constitute an offer to provide investment advisory services by QuantConnect. In addition, the material offers no opinion with respect to the suitability of any security or specific investment. QuantConnect makes no guarantees as to the accuracy or completeness of the views expressed in the website. The views are subject to change, and may have become unreliable for various reasons, including changes in market conditions or economic circumstances. All investments involve risk, including loss of principal. You should consult with an investment professional before making any investment decisions.
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