* MetaTrader 4, better known as MT4, is an electronic trading platform widely used by online retail foreign exchange speculative traders.
After you download your .mq4 or .ex4 indicator file you must:
1) Copy these files(or file) into your C:\Program Files\MetaTrader 4\experts\indicators folder
2) Exit your MetaTrader application (Ignore this if the MetaTrader 4 hasn’t been launched)
3) Turn on your MetaTrader 4.
4) On the left mt4 window side, find the “Navigator” window (CTRL+N)
5) Find there “Custom Indicators” directory, open it (+)
6) Find the indicator which you have just copied into your MT4 experts\indicators folder
7) Click and drag that indicator onto your active chart.