We follow the PUT and CALL windows with the boundaries, as :
DAY LOW~HIGH
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1 to 6 (FRI~FRI) 40Rs to 400Rs
7 to 11(MON~FRI) 35Rs to 350Rs
12 to 16(MON~FRI) 30Rs to 300Rs
17 to END(MON~END) 15~25Rs to 150~250RS
This is not based on ANY formula , but on just observations of last few days.