I am looking for an alert when price crosses a study, specifically the PriceChannel study in TOS for a basket of futures on the daily chart. I use both a 20 day upper/lower and a 40 day upper/lower channel. How do I create an alert system in TOS for the PriceChannel cross for the basket of futures I follow? Many thanks.

but on ToS if you ask technical assistance, trade desk, or ThinkScript Lounge someone can probably help. Here on NexusFi there is a thread called want your think or swim indicator created for free, ask in there maybe.

Check out this tutorial
https://toslc.thinkorswim.com/center/howToTos/thinkManual/MarketWatch/Alerts/studyalerts.html