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Help me to quick & deeper understand about mql5

MQL5 설계 Forex C++ Product Design

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I want to learn mql5 faster and faster, we can communicate to I have middle level understanding about mql5

language: English, chat

background me: 4 year+ experience programming, have understand about C++ and forex (mql4) (more than 1 year), now fulltime with mql5

I want to understand:

  1. the behavior of experts when receive tick, what do I have when new tick is arrived, flow execute (behide the scene, not only onTick) of the mt5
  2. the behavior of OrderSend in server, what happen if I call OrderSend, OrderModify?
  3. common errors about when we OrderSend, OrderModify
  4. what class can be used to store all information about the order we have, and how can I call this?
  5. how can get best performance with OrderAsync
  6. system design with expert
  7. how to get better performance for EAs in mql5?

We can communicate by chat in 2 weeks and I need some examples code from you to understand deeper in each part

noted that I want to understand most deeper about how it work behide the scene, so that I will ask you many question to understand

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