option-chain-analyzerlisted

# Option Chain Analyzer Turns a raw NSE option chain JSON into actionable structure. ## When to use - User pastes / fetches option chain data and asks for a read. - User wants to identify max pain, PCR, or notable OI build-up. - Pre-market or intraday: "where is BankNifty likely to pin?" ## Inputs Either: - A JSON dump from NSE's option chain endpoint (`https://www.nseindia.com/api/option-chain-indices?symbol=NIFTY`), or - Strike-wise call/put OI + premium tabular data. ## Computations ### Max pain Strike at which total OI value (writers' loss) is minimised. Often acts as a magnet near expiry. ``` max_pain_strike = argmin over K of: sum_i max(K - K_i, 0) * call_OI_i + max(K_i - K, 0) * put_OI_i ``` ### PCR (Put-Call Ratio) ``` PCR_OI = total_put_OI / total_call_OI ``` - > 1.3 → oversold / bullish reversal zone (contrarian read) - < 0.7 → overbought / bearish reversal zone - 0.8–1.2 → neutral ### Support / Resistance from OI - **Strongest resistance** = strike with highest call OI above spot. - **Strongest support** = strike with highest put OI below spot. ### OI build-up classification | Price | OI | Reading | |---|---|---| | ↑ | ↑ | Long build-up | | ↑ | ↓ | Short covering | | ↓ | ↑ | Short build-up | | ↓ | ↓ | Long unwinding | ### IV skew Compare ATM call IV vs ATM put IV. Put IV > call IV → fear premium. Useful for direction bias before events. ## Output format Return a structured summary: ``` Spot: 24,150 Max pain: 24,200 (likely pin near expiry) PCR (OI):