Originally Posted by newdigital

We have many thread about trailing stop. You may check some EAs and scripts which are doing this job:
Trailing Stop EA

E-ASEClose Expert from KIMIV

Trailing file

Also you may visit EA template page with the codes for trailing stop:

Templates to create EAs and Indicators

Kalenzo posted stop and trailing stop code somewhere here:
Wma 5/20 - Ema