Step 1: Menu System Tools-Indicator Manager-New
The name of the indicator, you can enter the closing price line.
Step 2: Set the formula property to? K-line form or K-line subsidiary index in the main picture
If you don't look at the K-line, just look at the closing price line and choose the K-line form in the main picture.
If you want to superimpose the closing price line on the K-line chart or the bamboo line chart, select the K-line subsidiary indicator.
Step 3: Write the code
Close;
Step 4: Right-click on the K-line chart and superimpose the technical indicators.
Load your own closing price line into the main picture.