I too hoped that it will be easy to spot such anamolies and make a profit out of it. However, traders are very good in hiding their intentions, and market as a whole takes time to assimilate and show these information. Start by asking what the market, buyers, sellers are percieving at this moment? Then search for an answer.
We are trading the market perception of the price, not the price itself. What Perception am I talking about? Here are some examples.
With the open interest you can find what the market participants are thinking and percieving. If the OI of a particular strike call increases we can infer, only infer and not assure, that participants are thinking the market will cross that strike upwards. This is a perception of the market participants. If the market goes above this strike price, then the call writers will cover their shorts leading to a price resistance at that price.
We can look at the market depth. Market depth shows only the passive traders(buy/sell). They may not trade in near future. We can try to match this change with the traded quantity with the Buyers/sellers standing in queue increase or reduce. If the traded quantity increases by 10,000 and 10,000 buyers reduced, then we can infer that 10,000 passive sellers became agressive by selling at market and leaving with their money.
These are examples which the microstructure pundits out there find and share. These relationships show the traders what is going on in the market and guess what is happening. It is considerable work, and trading is more difficult than being a brain surgeon. One has to be more passionate about making money and then keeping it.
May not have answered your question. You have the direction to find your own questions and then its answers. Happy trading.