Dashboard Tracker Default Value

Is there a way to default the dashboard tracker choosing Order Date to today’s date but still be able to change the date to view old information?

I would usually try a customization
assuming the dashboard has a tracker filter for the date field and is already deployed/listed on your menu

Then you could enable developer mode and start the new customization,
Here is one link to an overview:

This is just one of the many other examples on this site.

FYI… most things a user might need help with have already been discussed in some topic. So I usually do some searching before I start a new topic.
It can take a little practice before you can consistently find threads related to your questions but once you get the hang of it, can be faster than starting a new topic.

That link you attached takes me back to this original post of mine

Updated…try this one