As I click on the dropdown of any ticker that has had an increase or not, I deduce that they have been adding this info over the last week or so.
Like one of them that was last update on the 25th, but had not seen an increase in a couple of months.
Seems the only thing they were doing by showing that, was establishing a baseline for that ticker on that date.
Regardless, I really like this. It will save A LOT of work for those who track the OS closely.