I see the noun uptick as a synonym of upturn.
As uptick is a relatively new word in England (it's relatively new to me, anyway), I suppose its use as a noun - as awkward as it sounds to you and me - is not bound by older grammar norms. But I admit that it will take me some time to get used to seeing or hearing it as a verb without it jarring on me.
Gammon joint finshed in an air fryer?
Mandelson failed security vetting. Starmer says he didn’t know
