Hi,
I'm a graduate in BBA(accounts and finance), currently working as Associate Trader in US stock market having 7month work-experince, planning to pursue post graduation in UNSW but I'm confused between MBA(accounts and finance) or Master of Finance analysis. Please advise, also which course would be more helpful as I want make my career in finance sector.

You have too little work experience for their MBA, so the choice isn't available to you.

If you're looking for pre-experience, finance-oriented programs in Sydney, UTS also offers a Master in Finance. May be worth looking into, at the very least to compare to the UNSW course.