Trailing Stops

I need someone to explain what these are. I can’t find a satisfactory answer elsewhere.

Here is a generic explanation from a commonly known dealer’s site. I hope this helps. (Please understand that I have no opinion regarding this dealer or their services. This is purely for your edification and further understanding of fx markets.):
Commodity Brokers and Trailing Stops, Futures and Stop Limit Orders, Setting Stop Orders

Is there a particular situation that brought you to this question?