1. Open the following directory on your PC:
X:\Program Files\MetaTrader 4 - RoboForex\experts
X:\Program Files (x86)\MetaTrader 4 - RoboForex\experts (if you use 64-bit operating system);
in this case, X is a hard drive partition where MetaTrader4 terminal is installed.
Copy your expert advisor to the "experts" folder.
2. Launch the terminal; find your advisor in the list of expert advisors in "Navigator" window. To attach the advisor to the chart, just drag it on the chart using the mouse.