Comment on Intraday stock trader par excellence
Praveen,
Firstly when trading nifty you need to use product type as NRML to hold overnight. Check link for margins required.
In your case when it went from 5980 to 6000, your account gets credited by Rs 5500(50 x 110), when it goes to 5800 Rs 10000 gets debited and when it goes back to 6000 10000 gets credited again, at the end of everday there would be a marked to market done either crediting or debiting your account until you exit your positions.
Cheers,