Bulk Deal info gives a fair idea of the big investors like FII/DII Accumulating or dumping a stock. Its not the only factor to consider while buying or selling a stock. Its an additional info which gives an idea of when a stock might rally or fall.

http://nseindia.com/content/equities/bulk.csv
http://www.bseindia.com/mktlive/mark...bulk_deals.asp