Discussing the article: "Developing a Replay System (Part 51): Things Get Complicated (III)"
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Check out the new article: Developing a Replay System (Part 51): Things Get Complicated (III).
In this article, we will look into one of the most difficult issues in the field of MQL5 programming: how to correctly obtain a chart ID, and why objects are sometimes not plotted on the chart. The materials presented here are for didactic purposes only. Under no circumstances should the application be viewed for any purpose other than to learn and master the concepts presented.
If you read the previous article (I encourage you to), you know that we've started using the control indicator directly through the service. After that, the indicator was no longer freely available for placement on any chart.
After calmly analyzing the code, I noticed that we could make some modifications to make it even better. However, some changes will need to be made to other modules that will also be used by the replay/simulator system. For this reason, in this article we will focus on explaining the changes that will be implemented. This is because some of these modules will be available to the user. Therefore, it is important that you understand what can and cannot be manipulated, since you are the user of this system and the programmer who monitors its development. This is necessary to avoid instability in the use of any of the modules. Please remember that some modules can be used on LIVE and DEMO accounts, not just in the replay/simulator system.
You may not think that the changes you see here are that big, but before we push further modifications we need to make the code stable. For this reason, the article may seem vague. But I repeat: you must understand how the system develops. If you do not understand this, you will not be able to use the system properly.
Author: Daniel Jose