Comet EA Source Code

This page gives you the Comet EA free source code, the .mq5 file itself and not a compiled robot you have to trust. The engine is bullish trend, and you can rebuild any part of it.

• Platform: MetaTrader 5, a single .mq5 file
• Strategy: bullish trend
• Price: free, a free account is all you need
• Licence: study it, edit it and, if you want, rebrand it

In short, you get exactly the file we publish, and therefore nothing stops you from rebuilding any part of it.

How the Comet strategy works

The robot only trades in the direction the market has already chosen, and it stays out while that direction is unclear. It is the plainest approach there is, which is exactly why it makes a good base to build on.

Each filter removes a group of bad entries and, at the same time, a few good ones. Reading the code is the only honest way to judge that balance for your own market.

What is inside the Comet EA free source code file

• The trend filter, which decides the side the robot is allowed to take.
• The risk block, with the lot sizing, the stop loss and the take profit.
• Finally, every input with its default value, so you can compare it against your own broker.

How to compile and run it

1. First, download the .mq5 file from the button at the end of this page.
2. Then open MetaEditor 5 from MetaTrader 5, with F4 or the editor button.
3. After that, save the file inside MQL5 and then Experts, and press Compile.
4. Finally, refresh the Navigator and drag Comet onto a chart.
5. Run it on a demo account first, and read every input before you go live.

If the compiler complains, our guide on compiling MQL source covers the usual causes. In most cases it is simply a missing include or the wrong folder.

What you can change

Lengthening the filter makes the robot more patient and cuts the trades taken inside a range, which is where most of the losses come from.

Before any of that, however, look at the risk block. After all, a good entry with the wrong lot size still empties an account, and therefore the sizing deserves the first pass rather than the last.

More robots like this one are in the trend following source code, and the paid catalogue with documentation and support lives in the MT5 source code section. The idea behind trend following is explained well on this reference page.

Questions about the Comet EA free source code

Which platform is it for? MetaTrader 5.

Is the file complete? Yes, we remove nothing and we encrypt nothing.

Where should I start? On a demo account with the defaults, so you can see its natural rhythm before you change anything.

Does the broker matter? It does, especially the spread and the execution. Compare two before you judge the strategy.

Download the Comet EA free source code

The file below is the complete .mq5. First of all, create a free account or log in. Then download it and, finally, open it in MetaEditor 5.