IBD interview preperation for techie?

I recently received an interview opportunity with one of the big BBs and was wondering if anyone could give me a few pointers on what the BB's usually look for in an analyst candidate, or more in specific what I should do to prepare myself to become more qualified for the job?
I graduated from engineering, and have been working in IT consulting for over a year as a pm. Currently studying for my CFA L1 exam in December but have never taken finance courses in school. I read financial news everyday and trade fantasy stock (I know, it probably sounds really stupid). Is there anything else I can do? I'm really counting on this interview to break into the industry.

Thanks in advance for your help!