History of MQL5.community development

This is the fifth article from the series "MQL4 Languages for Newbies". Today we will learn to use graphical objects - a very powerful development tool that allows to widen substantially possibilities of using indicators. Besides, they can be used in scripts and Expert Advisors. We will learn to create objects, change their parameters, check errors. Of course, I cannot describe in details all objects - there are a lot of them. But you will get all necessary knowledge to be able to study them yourself. This article also contains a step-by-step guide-example of creating a complex signal indicator. At that, many parameters will be adjustable which will make it possible to change easily the appearance of the indicator.