The real author:
The indicator to trail the stop levels in the Expert Advisors. Up and low boundaries of the channel have individual input parameters for setting:
input uint UpTrailPeriods=5; //The period of search for high input uint DnTrailPeriods=5; //The period of search for low
This indicator was first implemented in MQL4 and published in Code Base at mql4.com on 28.10.2007.
Fig.1 The CandleStop indicator