Hi Vicky,
Columns You See Are Default Columns & Can Customised 50+ Columns Giving You Other Data Viz. OI, OI%, Etc..Etc..
BID ASK & Volume Is Used By Traders To Help Them, Or Many Times To Become Best Buyer & Best Seller
There Are No Spreads Built-In Like FCMs Trades Can Be Veirfied By Putting The Relevant Details On NSE & BSE To See What The Actual Execution Price Was & That Price Should Be Same As On The Contract Note....If It Isn't One Should Go With The Contract Not Directly To The Exchange To Report.
Other Helpful Columns Available Are Weighted Avg., TBQ, TSQ,
Happy & Safer Investing
SavantGarde