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Usage of the as_of parameter

The as_of parameter allows you to query historical data from a specific moment. You can specify it as a date alone (e.g., '2024-07-08') which CloudQuant Data Liberator interprets as midnight that date, or with specific times down to nanosecond precision.
All CloudQuant Data Liberator times are New York Time (US ET).

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Default behavior

When you omit the as_of parameter, CloudQuant Data Liberator assumes the current date and time.
In Liberator 2.4 and later, a future as_of on a live-appending dataset is rejected or bounded instead of holding a query worker in an empty-fetch loop. Use as_of at or before “now” unless you are intentionally querying forward-dated records that already exist in the source.

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Example query

This returns data for the specified date range.

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Without back_to parameter

If you specify as_of but omit or set back_to to None, the query returns data through yesterday’s completed trading bar:

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Jupyter notebook configuration

To display more rows in Jupyter:
Consider your data volume and test with smaller queries initially. See Query Considerations for more details.