Hi, I think you misunderstood the question. I am not try to get the spread, what I wanted is the spread charges.
i.e. the extra spread IG put on top of the market spread when you open a position.
How do I get the spread charge of an instrument with the REST/Streaming API? For example, I can see US 500 has a 1.5 spread charge right now in the web platform, but I can't seem to find the API for it.