eTrailing is an expert realized on May 26, 2007 by a Russian programmer which, if it is simply dragged onto a chart, sets an automatic trailing on all orders of a pair (Allposition = false), or on all running orders (Allposition = true).
The numeric parameters TrailingStop and TrailingStep are specified in points (1/10 pip).
Once the order is in profit as specified by the first parameter, trailing begins on that position, possibly signaling with a sound (usesound = true). The position will come closed if a reverse quantity movement set by the second parameter is registered
TrailEvo2 is an Expert Advisor for Metatrader 4. Its function is not to open positions, in fact it does not operate according to any strategy. The task of TrailEvo2 is essentially to manage the positions already open, both in discretionary and open by another EA