You may try this approach, I did Running sum of your Profit and used Lookup to do TRUE FALSE. I just applied somre colors to identify. You can Filter out False also by dragging to FILTER.
Tableau forum post.twbx 1.2 MB
first we fill in the nulls
then create a True false label
and it will return this
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Thank you! This did it. Much appreciate your help.
You are Welcome