The CDownLoadHistory class provides the methods of historical data downloading in two modes: “visual” and “silent”.
1. Visual mode
The example of use of this mode is downloadhistoryvisualmode.mq5.
The “history download mode” input parameter can be one of two modes: “current symbol” or “all symbols from Market Watch window”:
For the “All symbols from Market Watch window” mode, it will show two progress bars:
For the case if the “current symbol” mode is selected, the single progress bar will be shown:
It prints the results in “Experts” tab of “Toolbox” window:
2. Silent mode
The result of downloading is availiable as a return code. The silent mode can be useful in programs, where visualization is not needed. See example in downloadhistorysilentmode.mq5 script.
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