Hello Simon,
That is a pretty good question.
It depends if the EA has already synchronized. And if the Demo and live will open the same trades.
It is up to you. What I would normally do is to give it a little bit of time. In the beginning, I look at the Demo, because there is not enough data on live, but when the rules are there I would be strict to remove it.
For example, if you look for min 5 counts of trades, I would wait for one more trade in the live account to see what would be the results. If it will meet my criteria or not.