Instead of activate, I will say restart (restart = start from 0). In mt4 and ea will start working if: every time you attach them to a chart every time you change the chart timeframe
Expert advisors will continue execution if: every time a new bar starts - it continues execution. If you trade ticks it will continue execution every ticks. They do not restart every time the profile which has the chart in which the EA is attached to, is activated - Not sure about this one. You should not leave attached eas to the chart - especially on real account. To be safe, I always attach the ea again and remove it at the end of my trading every time you boot the platform - same as above.
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