Indicators are visual software tools that allow a trader to gather more information or data about the movement of the markets and consequently make more educated trading decisions.

There are hundreds of trading indicators used worldwide for various purposes, and on MT4 & MT5 trading platforms you can use a number of Indicators for free without installing any extra files.

Indicators use current and historical data in an attempt to predict future movements and are used by most traders, especially technical analysts.

If you wish to use some specific Indicators, you can build it by yourself or download one from MQL4/MQL5 websites.