---
title: "QuantConnect"
canonical: https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect
markdown: https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect.md
language: python
source: https://github.com/QuantConnect/Documentation/tree/master/01%20Cloud%20Platform/09%20Datasets/07%20QuantConnect
modified: 2026-10-29
index: https://www.quantconnect.com/llms.txt
---

# QuantConnect

[Documentation](https://www.quantconnect.com/docs/v2.md) > [Cloud Platform](https://www.quantconnect.com/docs/v2/cloud-platform.md) > [Datasets](https://www.quantconnect.com/docs/v2/cloud-platform/datasets.md) > QuantConnect

> Code examples are shown in Python. Append `?lang=csharp` to this URL for the C# version of this page.

The QuantConnect data provider provides a stream of trades and quotes to your trading algorithm during live execution. Live data enables you to make real-time trades and update the value of the securities in your portfolio.

When you deploy a live algorithm, you can use the QuantConnect data provider, a third-party data provider, or both. If you use multiple data providers, the order you select them in defines their order of precedence in Lean. For example, if you set QuantConnect as the first provider and Polygon as the second provider, Lean only uses the Polygon data provider for securities that aren't available from the QuantConnect data provider. This configuration fills the gaps in our coverage. We supply [SPX and VIX Index data](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/us-indices.md), which SPX and VIX Index Options need for the underlying index, but we don't supply Future Options data.

- [US Equities](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/us-equities.md)
- [US Equity Options](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/us-equity-options.md)
- [Crypto](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/crypto.md)
- [Crypto Futures](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/crypto-futures.md)
- [Forex](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/forex.md)
- [Futures](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/futures.md)
- [US Indices](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/us-indices.md)
- [US Index Options](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/us-index-options.md)
- [CFD](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/cfd.md)
- [Alternative Data](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/alternative-data.md)
- [Auxiliary Data](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/auxiliary-data.md)

### See Also

- [Dataset Market](https://www.quantconnect.com/datasets)
- [Live Trading](https://www.quantconnect.com/docs/v2/cloud-platform/live-trading.md)

## Pages in This Section

- [US Equities](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/us-equities.md): The US Equities data provider is a stream of security trades, quotes, and fundamentals delivered to your trading algorithm during live execution.
- [US Equity Options](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/us-equity-options.md): The US Equity Options data provider provides a stream of contract trades, quotes, and open interest delivered to your trading algorithm during live execution.
- [Crypto](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/crypto.md): The Crypto data provider provides a stream of security trades and quotes delivered to your trading algorithm during live execution.
- [Crypto Futures](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/crypto-futures.md): The Crypto Futures data provider provides a stream of security trades and quotes delivered to your trading algorithm during live execution.
- [Forex](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/forex.md): The Forex data provider provides a stream of forex pairs trades and quotes delivered to your trading algorithm during live execution.
- [Futures](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/futures.md): The Futures data provider provides a stream of contracts trades, quotes and open interest delivered to your trading algorithm during live execution.
- [US Indices](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/us-indices.md): The US Indices data provider provides a stream of SPX and VIX index values delivered to your trading algorithm during live execution.
- [US Index Options](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/us-index-options.md): The US Index Options data provider provides a stream of contract trades, quotes, and open interest delivered to your trading algorithm during live execution.
- [CFD](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/cfd.md): The CFD data provider provides a stream of contract trades and quotes delivered to your trading algorithm during live execution.
- [Alternative Data](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/alternative-data.md): The QuantConnect data provider can stream live alternative data into your algorithms to help you make informed trading decisions.
- [Auxiliary Data](https://www.quantconnect.com/docs/v2/cloud-platform/datasets/quantconnect/auxiliary-data.md): QuantConnect Cloud provides the following auxiliary datasets for algorithms running in our cloud.