Good day. First if you open your MT5 or Mt4, go to file click on it, then look for open data folder, then click on expat if you you are installing a robot and or if you want to install an indicator then click on indicator. Before you do all this copy your downloaded robot or indicator and paste it on either intended location. After you finish all this go back to your left hand side of your Mt and right click on where you see expart and indicators and click on refresh. Doing this your expart is ready. Have a wonderful trading carea.
Robots for mt4/5 are usually in ex4 file. You download those files put it in the expert folder then drag and drop it from navigator window to your forex pair. Turn on the necessary settings.