WHAT IS OPEN INTEREST, HOW TO ANALYZE IT AND DOES IT WORK?

In the thread I'll explain everything about Open interest and also all the tools used to analyze it and my personal opinion.

THIS IS THE ONLY THREAD YOU'LL EVER NEED ON OPEN INTEREST.

1: What is Oi?

Support if Mr A buys 10 lots of 17000ce in Nifty and Mr B sells 10 lots of call in Nifty then the total Oi on 17000 strike price will be 10.

So Oi is basically the number of outstanding contracts which are not squared off.

2: What is Oi used for?

Oi is only used to determine support and resistance on a particular strike price.

For eg: Nifty 16000pe has the highest Oi and 16200pe has to highest Oi.

So 16000 and 16200 level can be considered as good supports.

In the same way, 16500 ce has highest Oi and it can be considered as a resistance.

3: But why?

Highest Oi at 16500ce indicates that highest number of people have sold it BUT it also means that highest number of people have Bought it!

If 16500 acts as resistance, the option will go to 0 and all the buyers will lose money.