What if 2 same EA activate in MT4? Need to understand

[Steven_]

want to ask what if i place 2 or more same EA in a MT4,
(inside design have Group 1,2,3,4)
1 EA for Gold pair
1 EA for EURUSD pair
... so is it will affect the 2 pair if design Group 1,2,3,4. Or the magic number is the solution?

The requirement should allow run both pair to have 4 Group, gold(4 group) and eurusd(4 group)

[jstap]

Symbols will stop this across different assets. Magic will work across all assets, group is added to magic, so group 1 + magic 167489 will use magic 167490