feat: calculate a more realistic pnl

[guillaume-sig]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 87 lines in your changes missing coverage. Please review.

Project coverage is 6.26%. Comparing base (81bae96) to head (18b282c).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
portfolio_analytics/dashboard/dashboard_main.py	0.00%	27 Missing ⚠️
portfolio_analytics/dashboard/core/pnl.py	0.00%	26 Missing ⚠️
portfolio_analytics/dashboard/core/data_loader.py	0.00%	17 Missing ⚠️
portfolio_analytics/dashboard/core/stats.py	0.00%	14 Missing ⚠️
portfolio_analytics/dashboard/app/components.py	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           master      #8      +/-   ##
=========================================
- Coverage    6.38%   6.26%   -0.13%     
=========================================
  Files          23      23              
  Lines         861     878      +17     
=========================================
  Hits           55      55              
- Misses        806     823      +17     

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