Open Interest data simply shows us that how many contracts are open at specific period of time. For every open futures and options contract, there is a buyer and seller. These contracts remain open as long as anyone one of them choose to close it (or they are settled on expiry). Therefore, if you are successfully able to read Open Interest data then you will be able to predict market direction and can take timely entry and exit. So let’s understand how to read open interest data like a professional trader. Open Interest (OI) Trick in Options Trading to Make Money