This does sound like something very specific for the Tracker plugin, so there might be less responses related to it unless someone else has done something similar. Therefore using the plugin’s github issue forum is really sound advice from @ariehen .
I’ve got one idea though, and that is to prepopulate the weekend with positive values for the habit in question. This depends on you using templates to create the field/thingy to track, and to adjust this to set a positive value on Saturday and Sunday. (Or alternatively just duplicate the Friday’s value, positive or negative)
This strategy will keep the streak going through the weekend, and pick up its “correct” value the next week. It’s a little hacky, but I’ve used it in other contexts with great success, and it might work in your case as well.
Thanks both. I’ll have a look at that forum to see what I can see,
I can easily just mark Saturday and Sunday’s as ‘done’ on the days, but it would mean my ‘streak’ days is actually wrong, by 2 days every week. It is what I’m going now, but it just seemed like something the tracker would be able to handle. Thanks for pointing me in the right direction.