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Lean Algorithmic Trading Engine by QuantConnect (Python, C#)

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#### Description Prevent empty option chains by including weeklies by default #### Related Issue Closes #8958 #### Motivation and Context N/A #### Requires Documentation Change N/A #### How Has This...

#### Expected Behavior Fractional US share support depends on the account not the asset type; whether fractional shares are supported should be governed by the brokerage model not the Symbol...

feature
impact-low

#### Expected Behavior `OrderEvent` and `SerializedOrderEvent` should have an `ExecutionId` field to store the unique execution identifier provided by brokerages. #### Actual Behavior Currently, `OrderEvent` and `SerializedOrderEvent` classes do not...

feature
depth

#### Expected Behavior With .Net 10 being the LTS which includes several performance benefits, I would wonder if it was possible to migration to .Net 10 while modernizing the legacy...

### Summary Closes #9136 I'd like to contribute Tradovate brokerage support to LEAN. Tradovate is a popular futures broker, especially among prop firm traders using platforms like Apex Trader Funding,...

### Summary I'd like to contribute Tradovate brokerage support to LEAN. Tradovate is a popular futures broker, especially among prop firm traders using platforms like Apex Trader Funding, TopStep, and...

## Description Implement XTS API as a new Lean brokerage plugin. ## Motivation and Context All major Indian brokers provide algorithmic trading access through XTS REST APIs. Implementing this new...

#### Expected Behavior Future chain with correct contracts #### Actual Behavior The June (M) contract expires on the 18th: Future Chain uses the 19th. #### Potential Solution Juneteenth 2026 ####...

#### Description - Add 2026 CME Future & HKFE Holidays, early closes, late opens and bank holidays - The information was extracted from https://www.cmegroup.com/trading-hours.html and https://www.hkex.com.hk/Services/Trading/Derivatives/Overview/Trading-Calendar-and-Holiday-Schedule?sc_lang=en - The unit test...

#### Description Changes Config.Get logging from Trace to Debug level to reduce console output noise. #### Related Issue Closes #9101 #### Motivation and Context N/A #### Requires Documentation Change N/A...