Anyone can code this up for ninja?
thanks
formula can be found here
http://books.google.com.au/books?id=OmkgfTUx9pMC&pg=PA44&lpg=PA44&dq=Blau%27s+Tick+Volume+Index&source=bl&ots=U9l82t5fVp&sig=XekQf-7XZNOtHs1que8uaYSm4aw&hl=en&ei=HydnS_aWOovq7AOIrvUk&sa=X&oi=book_result&ct=result&resnum=3&ved=0CA4Q6AEwAg#v=onepage&q=&f=false
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