In this series, we will explain from the basics of program development using MQL5 to the creation and distribution of practical indicators and EAs as clearly as possible. For those who want to learn MQL5 from now on, as well as for those who want to create their own tools or shape trading logic, we aim to provide useful content. By including sample code, we will gradually introduce the basics of syntax, the mechanism of indicators, the flow of EA development, and the mindset during implementation, so that you can acquire knowledge that can be applied to actual development.