Comment on BTST/ATST( Buy/Acquire Today Sell tomorrow)

Vicky don’t know if I understood your question right. To trades futures, either stock/index, you require a margin to trade. This margin can be found using [SPAN calculator](http://www.zerodha.com/z-connect/blog/view/span-calculator) or using SPAN file, [check this blog for more.](http://www.zerodha.com/z-connect/blog/view/zerodha-margin-policies)The blog on margin policy should have answer to your query, do check it out and if there is anything else, do post it again.

Cheers!!

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