Cash or futures for high volume

Hi Everyone,

For intraday trading in high volume, which segment is better cash or future ? For example, if I want to buy 1000 shares of tcs , should I place 1000 orders in cash segment or should I buy 4 lots of tcs in future .
I think placing orders in cash will require less intraday margin but may lead to slippage in higher volume.
Please share your experience of trading in high volume.

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