Guides

You downloaded an Expert Advisor as source code, a file ending in .mq5, and now you need to turn it into something MetaTrader 5 can actually run. That runnable file is the .ex5, and you build it by compiling the source in MetaEditor. This guide walks through the whole process from a clean install. What […]

MQL4 and MQL5 are the two programming languages used to build Expert Advisors and indicators for MetaTrader. They look similar, but they are not interchangeable. An .mq4 file will not compile in MetaTrader 5, and an .mq5 will not compile in MetaTrader 4. If you buy or edit source code, knowing the difference saves you

Free EA source code is a great way to learn how robots are built, test ideas, and start your own strategy without paying for something from scratch. But not all free code is worth downloading. Here is where to look and how to tell good source from junk. Where free source code comes from Open

One of the biggest advantages of buying or downloading an EA as source code instead of a locked .ex5 is that you can change it. Adjust the strategy, tweak the risk, add a filter. But editing code you did not write can go wrong fast. Here is how to do it without breaking a working

If you have source code with a license that allows redistribution, you can rebrand an Expert Advisor, give it your own name and identity, and sell it. Done right, it is a legitimate way to build a product line. Done wrong, it is piracy. Here is how to stay on the right side of that

Gold, traded as XAUUSD, is one of the most popular markets for automated trading. It moves fast, trends hard, and spikes on news, which makes it a favorite for Expert Advisor developers. If you want to learn how gold robots are built, studying free source code is the best starting point. Why gold EAs are

When you buy an Expert Advisor, you are usually offered one of two things: a compiled robot you can run, or the full source code you can read and edit. They are very different products at very different prices. Here is what buying source code actually gives you, and when it is worth it. Compiled