"Score was changed" smart list filter

Hi there,

We want to run a campaign to boost up the amount of people we have who are in "pre-MQL" stages --our MQL score threshold is 100, so this campaign will target people whose scores are between 65 and 99 -- so that we can see if we can get them to take some action and thus increase their score, hopefully crossing the threshold.

To do this, I am trying to create a smart list of people whose 1) person scores are between 65 and 99, and 2) whose person score was positively changed (increased) within the last 90 days. I don't have to worry about creating a filter for the "last 90 days" because the new Data Retention Policy only keeps this data for 90 days anyway. But I am having an issue trying to add the constraint of "score was positively changed".

So I have the following filters:

1) Person Score between 65 and 99.

2) Score Was Changed

Score Name = Person Score

Change = blank (because I don't know what to do)

So, ideally I just need to add to the filter that the "change" in the score is a positive changed... I don't really care what number it is (if it increased by 1, or 2 or 20) I just care that it positively changed.

Help?

Thanks!

-Leticia