count consecutive negative days

Maybe this:

=TODAY()-MAX(IF($A$2:$J$2>=0, $A$1:$J$1))

comfirmed with ctrl+shift+enter

or this:

=MAX(A1:J1)-MAX(IF($A$2:$J$2>=0, $A$1:$J$1))

comfirmed with ctrl+shift+enter

where in first row are dates and in second row values

Your post does not comply with Rule 8 of our Forum RULES. Cross-posting is when you post the same question in other forums on the web. You'll find people are disinclined to respond to cross-posts because they may be wasting their time solving a problem that has been solved elsewhere. We prefer that you not cross-post at all, but if you do (and it's unlikely to go unnoticed), you MUST provide a link (copy the url from the address bar in your browser)to the cross-post. Expect cross-posts without a link to be closed a message will be posted by the moderator explaining why. We are here to help so help us help you!

Read this to understand why we ask you to do this