It means this :

Automated trading systems, serve as an assistant, and a fully automatic tool for conducting profitable trade in the forex market. Another system is called data (advisors, trading robots, MTS) they mean by a program in which laid down a clear algorithm on which it opens and closes the transaction in the terminal InstaTrader without human intervention.
At the moment, advisors (trading robot) are very popular among traders because thanks to them, the trader is no longer necessary to be in front of the monitor around the clock, the adviser himself analyzes the market situation, taking informed decisions, and make transactions around the clock.
Continuation of the article forextoolss. blogspot. com