A .mq4 file is a text-based file that contains the source code of a trading strategy, indicator, or script written in the MQL4 programming language. MQL4 is a proprietary language developed by MetaQuotes Software Corporation, the creators of MT4. These files are used to create custom trading strategies, technical indicators, and automated trading systems (also known as Expert Advisors or EAs) that can be executed on the MT4 platform.
Alex didn't have a big bank account. He had $400 and a grudge against the markets that had wiped out his father. He didn't try to predict the future. He tried to out-structure randomness.