Lattice EA Source Code

This page gives you the Lattice EA free source code, the .mq5 file itself and not a compiled robot you have to trust. It is a high-frequency grid robot, and the file shows every rule it follows.

• Platform: MetaTrader 5, a single .mq5 file
• Strategy: high-frequency grid
• 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 Lattice strategy works

A high frequency robot takes many small trades and depends on execution more than on prediction. Spread, slippage and the speed of the broker decide the outcome, so the filters that block a trade when conditions are poor are the real strategy.

A grid robot opens a new order every time price moves a set distance against the position, so the average entry improves while the market keeps going the wrong way. The basket then closes together once the combined profit reaches its target.

Because every condition has to agree before a trade opens, the robot passes on plenty of moves. That is the trade off it was built around.

What is inside the Lattice EA free source code file

• The spread and execution filters, which stop the robot when the cost is too high.
• The grid, the distance between orders and the maximum number of positions.
• 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 Lattice 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

Set the spread limit to what your broker really charges before you touch anything else. On this kind of robot the broker matters more than the settings.

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 grid and martingale source code, and the paid catalogue with documentation and support lives in the MT5 source code section. The idea behind high frequency trading is explained well on this reference page.

Questions about the Lattice EA free source code

Which platform is it for? MetaTrader 5, as a single .mq5 file.

Do I get updates? You get the file as it stands. Once it is yours, you improve it.

What pairs suit it? Start with the majors on a demo account, because they behave predictably while you learn the settings.

Can I reuse a part of it? Yes, and that is usually the best use of a free robot. Take the block you need and drop it into your own.

Download the Lattice 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.