adding data range for VaR

[pftp-jz]

Description

its a small / extra small feature

Simple change to VaR function for stocks, this will allow users to use data ranges for the analysis
This way you wont need to load amazon 3 times, to make the analysis from 2019 to today, this month and this week

How has this been tested?

Check Command Documentation..............................................Passed
check yaml...........................................(no files to check)Skipped
fix end of files.....................................(no files to check)Skipped
trim trailing whitespace.............................(no files to check)Skipped
check for merge conflicts................................................Passed
detect private key.......................................................Passed
black....................................................................Passed
flake8...................................................................Passed
codespell................................................................Passed
mypy.....................................................................Passed
Strip notebooks output...............................(no files to check)Skipped
Passted all tests in stocks/quantitative_analysis
passed all tests for qa_view
was used in terminal as a test

Checklist:

• Update our Hugo documentation following these guidelines.
• Update our tests following these guidelines.
• Make sure you are following our CONTRIBUTING guidelines.
• If a feature was added make sure to add it to the corresponding scripts file.

Others

• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• My code passes all the checks pylint, flake8, black, ... To speed up development you should run pre-commit install.
• New and existing unit tests pass locally with my changes. You can test this locally using pytest tests/....

[DidierRLopes]

Thanks @pftp-jz !

Can you add this # pylint: disable=C0302 between imports and code?

[pftp-jz]

Done

Thanks @pftp-jz !

Can you add this # pylint: disable=C0302 between imports and code?