Basically available software, such as Feihu, right-click on the online chart, and there will be an inversion coordinate.

For example, if Tongdaxin K-line is inverted in the indicator, there is FKX (reverse K Line);

A blank position should be left. When making market predictions, it is very inconvenient not to have this blank space. I have to take a screenshot and forget about the gross. Not to mention the trouble, the accuracy is far behind.

There are also flushes and great wisdom