If you are a Windows 10 user then you probably don't need to do all the steps of  the installation instructions for the MMM framework. If so, all you need to do is:

  1. Download the binaries from download section (be careful about the bitness) and put them in the library path:
    • In MTs terminal view hit File -> Open Data Folder, navigate to MQL5, Libraries (or in the MetaEditor click the right mouse button on the Libraries node and then click Open Folder)
    • Extract the DLL
  2. Allow
    • WebRequests to Telegram (https://api.telegram.org) -> Not needed in newer versions of MT
    • DLL usage (can also be allowed seperately each time an Expert Advisor is started)

2019 09 13 07 48 53 Telegram (1009)

Now you need to Import the DLL in your MQL code and go! See the examples in the Git repo for real code.