Function of "No trade"

[Kiuyiak]

I want to ensure my trade only execute when there is no position in the account. So I just the node of "No Trade". But it sees not working. Anyone has any idea on how to fix it? I have attached my work flow and parameter selection below for reference.

Thanks.

[jstap]

No trade at the top like that should stop any trade from opening once 1 is open. If this continues restart the project from scratch.

[Kiuyiak]

Thanks a lot