one account per signal (one signal per account).
I collected some informative posts here - https://www.mql5.com/en/forum/9950/page87#comment_3961740
and there is the article related: Tips for Selecting a Trading Signal to Subscribe. Step-By-Step Guide - the article

How to Start with Metatrader 5
- 2016.12.17
- www.mql5.com
I decided to create this thread to help to myself and to the others to start with Metatrader 5...

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Dear,
I am using signal but only one signal. Can i subscribe multiple signal into my one account on MT4