What is Expert Advisor

General rules of EA using (Mechanical Trading System)

For functioning the expert is required that on computer was installed and uncared-for MetaTrader 4, expert was attached to Chart and were enclosed all necessary options, allowing actions of the expert. In operation expert computer must have a constant connection to trade server.

The File by default, where kept experts, which MetaTrader 4 must find at start: C:\Program Files\MetaTrader 4\experts

Experts in editable form (source code) have an extension mq4.
Example: expert.mq4

Experts in compiled form (source code of expert translated in computer code) - such as OUR files, have an extension ex4.
Example: expert.ex4

  SETUP PROCESS. After you put EA (for example - Expert.ex4) in folder \experts, it will be necessary to re-run MetaTrader 4, therefor that MT has found a new expert. If all of this are done, and it is correct, that expert will come up for list as on drawing:

Hereinafter necessary to attach the expert to chart and in dialogue window to include the necessary options.

The last necessary is to allow trade by pressing on button at MT panel (top-left) :

If all are done true, up-right corner of chart will appear the symbol of the smile like this ^

EAs does NOT run WITHOUT installed MT4 platform ! They run ONLY UNDER MT4. For all of your questions, first read the Official MetaTrader User Guides please.

MetaTrader4 terminal - download it! :

Download is FREE. Demo-account on ANY SUM creates automatically during Setup www.metaquotes.net

All that you needs to know about Terminal Official MT4 User Guides