What is the format of HST?

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I need to convert HST files into CSV or Text file.

Is there any document around to teach me how to do so? Perhaps a script/ea?

Thanks!
 
Client terminal user guide - Tools - History Center - Historical File Format (HST Files). You can search it by keyword "hst".

Period_converter script writes hst file.

See also https://www.mql5.com/en/search/hst
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