hi
different people interpret OI in different ways, OI is difficult to interpret when the market is very flat or with in a very narrow range.
one can decide the trend of the underlying security based on the OPTIONS OI data , when a security moves north :-
1.with increase in OI in call options
2.negative change in OI in call options are considered to be positive
3.very high positive OI in puts of specific price can also be considered
when a security moves south wards :
1.increase OI in put options
3.negative OI in put options
4.very high Positive OI in call options of specific price can be considered
we can only decide the whether it is put accumulation or call accumulation based only on the trend of the underlying security. if a security is going down with addition of OI PUT ACC if security is going up with OI addition then its CALL ACCU
we cannot exactly describe whether put accumulation or call accumulation is going on when trend of security is flat,, unless when there is abnormal change in oi
i generally take my decisions only when there is a change of more than 1/3rd of selected contract