Hi Francesco,
MT4 ID is used to connect the EA to Telegram.Forex app. There you can connect up to 5 MT4 accounts. For example, if you set “MT4 ID” to 1 in the EA’s inputs, then you need to check the box next to “MT 1” in the app. If the connection is successful, you account number will appear there and the first box in the lower left corner will be green.
Next, on the left side of the app window, select which channels to track. Then, click on the account number at “MT 1” button, and select which of the channels to track with this account. The received messages will appear in the box below.
For a more detailed explanation, please check the manuals included in the .zip file.
Telegram.Forex