Nisha,
99% of the commentary is useless.
and that 1% makes the big difference while day trading..
1. finance minister comes on tv, and nifty rallies 100 points.
2. IIP data comes and market rallies 100-150 points.
3. Inflation Data comes and market crashes 200 points.
4. Advance/Declines ratio - helps to understand the direction of the market.
5. Sectors wise movement - also helps for a intraday trade.
6. Asian markets give morning direction upto 11-12pm.
7. European markets will make or break the indian markets by 2-3pm.