regenerate price-movements notebook, and other cleanup#666

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DanielGoldfarb merged 4 commits intomatplotlib:masterfrom

DanielGoldfarb:master

Apr 2, 2024

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Merge remote-tracking branch 'upstream/master'
DanielGoldfarb
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Commits on Apr 2, 2024

re-generate price-movement_plots notebook
DanielGoldfarb
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