Please go through this post by Linkon Sir......
Here he has mentioned that big players are generally considered as Option Sellers..... and if there is huge OI buildup in particular contract it is safe to assume that big players have shorted that contract.....
Hence, if there is huge OI addition in 4700 Put, it is safe to assume that this level is secured for now and it would act as a good support and markets should move up..... Similarly, if there is huge OI addition in 5200 Call, it is safe to assume that this level is going to provide a strong resistance and markets should be contained within this level for time being......
Hope this makes some sense....
Here he has mentioned that big players are generally considered as Option Sellers..... and if there is huge OI buildup in particular contract it is safe to assume that big players have shorted that contract.....
Hence, if there is huge OI addition in 4700 Put, it is safe to assume that this level is secured for now and it would act as a good support and markets should move up..... Similarly, if there is huge OI addition in 5200 Call, it is safe to assume that this level is going to provide a strong resistance and markets should be contained within this level for time being......
Hope this makes some sense....