Magic Number

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I Install my EA on 4 Charts i.e. BTCUSD 15MiN, BTCUSD  30 MIN, XAUUSD 15MIN, XAUUSD 30 MIN. I want to know that  I require One Magic Number for All or 4 Magic Number.  
 
Your topic has been moved to the section: Expert Advisors and Automated Trading
Please consider which section is most appropriate — https://www.mql5.com/en/forum/172166/page6#comment_49114893
 
Raj Tandon: I Install my EA on 4 Charts i.e. BTCUSD 15MiN, BTCUSD  30 MIN, XAUUSD 15MIN, XAUUSD 30 MIN. I want to know that  I require One Magic Number for All or 4 Magic Number.  

For charts with different time-frames on the same symbol, always use different magic numbers.

For charts with different symbols, if the EA is able to distinguish from itself on different symbols, then you can use the same magic number otherwise use different magic numbers.

When in doubt, simply use a different and unique magic number for each chart.

 
Thanks  for clarification
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