How do I make this in my scan? :)

[vro3]

Could someone help me figure out a custom study in a scan?

def price = close;
plot scan = absvalue(price / price {30} - 1) > .02;

I tried copying it in, and I tried finding what would make that happen. Haven't figured it out. Looking to a low float gap scan, and I think that has something to do with a raise in price after close?

Any help would be great appreaciated! Screenshot of the scan in use.