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Seed securities by default #9045
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jhonabreul
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QuantConnect:master
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jhonabreul:feature-8255-seed-securities-by-default
Nov 18, 2025
Merged
Seed securities by default #9045
jhonabreul
merged 37 commits into
QuantConnect:master
from
jhonabreul:feature-8255-seed-securities-by-default
Nov 18, 2025
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This is true by default and indicates that the engine will seed initial prices right after the security is added or selected
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Martin-Molinero
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Nov 11, 2025
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Thank you!
Martin-Molinero
approved these changes
Nov 18, 2025
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Description
Add a new algorithm setting
AlgorithmSettings.SeedInitialPricesto indicate whether securities should be seeded with initial prices rigth after manuall adding them or after selection. This is true by default, so securities now will have a price set when the addedSecurityChangesis received.The logic to get seed data is in the new
Dictionary<Symbol, IEnumerable<BaseData>> GetLastKnownPrices(IEnumerable<Security> securities)method and it's used as a centralized way to seed securities throughAlgorithmUtils.SeedSecuritieson universe selection and to set up currency conversion rates.Algorithms:
CustomDataUniverseRegressionAlgorithm:The added check can be reverted after #9055 if addressed.
AddBetaIndicatorNewAssetsRegressionAlgorithm:Currency conversions seeded with minute data after new changes, using a quote bar as last data instead of a daily trade bar (master).
Related Issue
Closes #8945
Closes #8255
Closes #4736
Motivation and Context
Requires Documentation Change
How Has This Been Tested?
Regression algorithms
Types of changes
Checklist:
bug-<issue#>-<description>orfeature-<issue#>-<description>