For me, I was a little unsure about how to format a call to get continuous /NQ contracts. A bit of advice, is log into the normal web UI in chrome… display the data you want to see… press command + shift + c to access the developer console… go to “Network” tab on the top, then click on the command you want to see.
In my case, I wanted to see what the web socket request looked like for /NQ continuous:
Just a tip as you can see the exact endpoint that’s requested, what data is passed, etc…