How to set a 30-minute warning of great wisdom?

First, make up a stock selection early warning formula, click Tool Management Formula, select Self-editing, select conditional stock selection, and then create a new stock selection formula, named XGP, with stricter conditions, otherwise there will be too many stock selections, and then save it after editing.

Click Alert under Tools, click Add Condition, select the formula "XGP" just compiled under Conditional Stock Selection, add Shanghai A shares, select all with ctrl+A, and confirm, add Shenzhen A shares, and select all with ctrl+A, and confirm. The analysis period is 30 minutes, and then the alarm is confirmed and started.