As far as I understand - the open trades will be copied only. It means: if you subscribe to the signal but the signal provider is having open trades so those trades will be copied at the current price.
Look at the post #5 for more details.

- 2017.07.28
- Rosalba.A
- www.mql5.com
my open positions are from the same signal provider, so you think if i resubscribe, i will have double positions than the provider?
Hey...
I was subscribed to a signal for more than a yr, and have multiple open positions from the signals. Some how I missed to renew the subscription in time, now if I re subscribe will all the orders be repeated? Or only new trades will be copied.
Also will old positions be closed if the provider closes?
Thanks
No, already copied positions will not be copied again.
During the initial synchronization the MQL5.com Signals system will scan and skip all those trades that have already been copied and it will copy only those that are not present in your account.

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Hey...
I was subscribed to a signal for more than a yr, and have multiple open positions from the signals. Some how I missed to renew the subscription in time, now if I re subscribe will all the orders be repeated? Or only new trades will be copied.
Also will old positions be closed if the provider closes?
Thanks