When in the dialogue where you are selecting signals and indicators, if you use the search functionality (SPECIFIC TO SIGNALS), it appears everything must be lowercase, otherwise it doesn't find it.
For example, in the Signals search box, look for "MACD". Won't find it. But if you type "macd", it does.
Attachment Capture.png added
Status changed from Waiting for information to Refused
Can you attach some screenshot or video where exactly are ou searching?