# Sahi Option Chain — sahi.mrchartist.com Live NSE and BSE option-chain analytics. Open interest, Greeks, implied volatility, PCR, GEX, max pain, scanners and a multi-leg strategy builder. Free, browser-only, no login. Analysis only — Sahi does not accept orders and does not provide investment advice. ## Tool hubs - https://sahi.mrchartist.com/option-chain — live option chain: strike-wise OI, LTP, volume, IV, Greeks - https://sahi.mrchartist.com/open-interest — strike-wise call and put open interest, walls and build-ups - https://sahi.mrchartist.com/oi-heatmap — OI heatmap: where open interest concentrates by strike - https://sahi.mrchartist.com/pcr — put-call ratio, CE vs PE OI balance and crossovers - https://sahi.mrchartist.com/charts — price charts with option-derived levels - https://sahi.mrchartist.com/max-pain — max pain strike and full pain profile Every tool hub has one page per NSE/BSE F&O symbol at //, for example /pcr/banknifty or /option-chain/reliance. Each symbol page carries a data table of that symbol's current values in the HTML, with an "as of" timestamp, plus a symbol-specific FAQ and links to the same symbol on every other tool. A hub with no symbol in the URL loads NIFTY. ## Other tools Open interest by strike, OI change, OI spurts, OI heatmap, max pain, PCR, PCR crossover, and ATM premium with the expected move. ## Per-symbol analysis One detailed article per F&O symbol at /analysis/, e.g. https://sahi.mrchartist.com/analysis/nifty — the strike table, where open interest sits, what the PCR says, distance to max pain, what changed in the session and the move the straddle prices. Rebuilt as the snapshot data refreshes, with an "as of" stamp. Where a symbol's book is too thin to support a reading, the article says so rather than asserting a level. https://sahi.mrchartist.com/sitemap-analysis.xml lists every one. ## Guides Two kinds. Tool guides explain a method and apply to any underlying. Index guides explain one underlying's contracts — how it is listed, where its liquidity sits, how it differs from the other indices. Educational, updated over time. - https://sahi.mrchartist.com/guides/ — index of all guides - https://sahi.mrchartist.com/faq/ — every FAQ from every guide, grouped ### Index underlyings - https://sahi.mrchartist.com/guides/nifty-options.html — how NIFTY index options work - https://sahi.mrchartist.com/guides/banknifty-options.html — BANKNIFTY, and why a concentrated index prices wider - https://sahi.mrchartist.com/guides/sensex-options.html — SENSEX on BSE, and comparing it with NSE honestly - https://sahi.mrchartist.com/guides/finnifty-options.html — FINNIFTY, and what a thinner book means ### Tools - https://sahi.mrchartist.com/guides/option-chain.html — reading an option chain column by column - https://sahi.mrchartist.com/guides/open-interest.html — absolute OI, OI change, OI change %, volume, build-up - https://sahi.mrchartist.com/guides/oi-change.html — intraday open interest shifts - https://sahi.mrchartist.com/guides/oi-heatmap.html — strike concentration and OI walls - https://sahi.mrchartist.com/guides/pcr.html — put-call ratio, OI-based vs volume-based, and call/put OI crossovers - https://sahi.mrchartist.com/guides/max-pain.html — the max pain calculation and its limits - https://sahi.mrchartist.com/guides/atm-premium.html — ATM straddle, expected move, premium decay - https://sahi.mrchartist.com/guides/oi-spurts.html — sudden OI build-up and low-base false positives - https://sahi.mrchartist.com/guides/charts.html — price with option-derived levels ## Sitemap https://sahi.mrchartist.com/sitemap.xml (sitemap index) https://sahi.mrchartist.com/sitemap-guides.xml (guides and the two hubs)