I'm working on my own option trade calculator. Once completed I'll put it online for everybody to use.
For that to work best I need a data source that provides me with latest option data such as bid/ask (if available), volatility etc.
I am well aware that I'll have to pay for that. I'm currently talking to paritech and iress. Paritech seem to be the better (cheaper) solution, they seem to be around 1500$ per month. But I'm still not clear of what that includes (waiting for an email response). Also there will be ASX royalties involved.
Can you guys point me to a descent data provider for 20 min delayed data (or perhaps you work for one )?
Also, do you happen to know how much the ASX royalties would be? These guys just don't respond to any queries!