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I am always trying to use different magic numbers for any case you described. Sometimes the coders say: "use same magic number with my EA". If the coder did not say like that so I will use dffrent magic number for any EA/pair/timeframe combination.
For example:
- Codersguu said that his MaChannel (elite section) can be used with same magic number if trading on one copy of Metatrader on few charts but for MaChannel only on Metatrader;
- davidke20 said the same about his 10p3v0.03 (public EA);
- project1972 said the same about his Alpha and Electra EAs (elite section).
All those cases are about testing just one EA with many charts.
I understand magic number as personal protection: if I use different magic number for any case so I am sure that EA will know exactly which order should be modified or closed for example.
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