Required If Field

equal($status,"Closed")

Thank you! I'm actually thinking I need to do this a little differently because the "Required If" calculation is not  giving me what I want. Instead I think it needs to be housed in the Visible If section. I need the field to be visible based off of 2 factors, and I'm not sure how to connect them. I currently have:

greaterThan(strlen($account_alert_c),0)

I need to also have it visible if, equal($status,"Closed"). 

How do I connect these together? I have tried to use AND, and a comma. I get errors every time. What am I doing wrong?

The formula maybe : 

and(greaterThan(strlen($account_alert_c),0),equal($status,"Closed"))

That did it! Thank you SO much.