Fix backtest#719

Merged

you-n-g merged 10 commits intomicrosoft:mainfrom

zhupr:fix_backtest

Dec 7, 2021

Commits on Nov 28, 2021

fix test_storage.py
zhupr
committed

Commits on Dec 2, 2021

add backtest_daily
zhupr
committed

Commits on Dec 3, 2021

modify backtest_daily's docstring
zhupr
committed

Commits on Dec 6, 2021

add __repr__/__str__ to Position
zhupr
committed

Commits on Dec 7, 2021