Given the nature of the filename telegram4mql.dll, this appears to be a specific Dynamic Link Library file intended to bridge the Telegram messaging API with MQL4 or MQL5 (the coding languages for MetaTrader 4/5 trading platforms).
Community feedback on platforms like MQL5 is largely positive: telegram4mql.dll
to import this DLL into an Expert Advisor, or are you looking for a download source Given the nature of the filename telegram4mql
Data Logging: Export trade history or account equity updates to a private channel. Installation Guide telegram4mql.dll