Spot Nifty or Futures Nifty what we have to consider in OI

F&O
1

I consider OI as Resistance and Support most of the times I trade but I have a doubt regarding what we have to consider.
Shall I consider NIFTY 50 Spot as the instrument or NIFTY FUTURES of current month.

Thanks for ur answer in advance.

2

Nifty spot is just an underlying which has no trades on it, OI is on particular contract, future in this case.

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3

what I mean to ask is what we have to consider NIFTY Spot or Nifty Futures if we consider Call Put OI as Support and Resistance