Why the zerodha/tradesmartonline blocks more margin?

[yashu21985]

I have checked using span calculator and found that they will block more margin than the loss expected. Why?

Suppose for xyz stock, I buy 1480CE 1000 quantity And sell 1460CE 1000 quantity, in this case the maximum loss for me will be 20k rupees but they are blocking 2 lakh rupees.
I don't understand. Someone please explain.

 

[cloudTrader]

Try astha trade. U will get margin benefit.

Can you be more specific referring the scenario above presented by the thread owner .