I am going to need a bit more detail on that one, Looking at the node output you have shared the server you are talking to is responding with a 200 header but has no data. I am not sure why the service you are using is not returning anything but it could be that the API just responds with the header status and that is it.
Only if signal.profittrader actually responds with anything, You can’t really compare 2 different API endpoints as not everyone builds out their APIs in the same way. What does Profittrader say they will respond with in their API docs?
Yes, Looking at the response you have back I would say n8n is processing whatever we are getting. But I also don’t know the API or what it should be sending back so the information I have available to me is very limited.