Open Interest & Writing

Call writing, put writing, OI change, short covering, long unwinding, and the price+OI matrix for intraday options.

17 articles in this cluster

Start here — pillar guide

Pillar

Open Interest Explained: The Core of OI Analysis

Learn what open interest means, how it changes intraday, and how to use OI analysis for Nifty and Bank Nifty option trading decisions.

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Live tools for this topic

OI analysis

PCR, max pain, and ATM OI bars.

OI dashboard

Multi strike OI

Compare call vs put OI across strikes.

Multi strike chart

OI spurts scanner

Largest OI moves across F&O market.

OI spurts

Related guides, answers & comparisons

Comparison5 min
Call Writing vs Call BuyingCall writing vs call buying — risk, theta, margin, chain signatures.
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Call Writing vs Put WritingWhen writers choose each side — bias, strikes, strangles.
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How to Identify Call Writing on the Option ChainLearn how to spot call writing (call selling) on Nifty and Bank Nifty — OI buildup at resistance, volume confirmation, LB/SB labels, and when call writers are defending a strike.
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How to Read OI Change on Nifty Options — With ExamplesHow to read OI change (change in open interest) on Nifty and Bank Nifty — long buildup, short buildup, covering, unwinding, and the price+OI matrix every intraday trader should know.
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Long Unwinding (LU): OI Down, Price DownWhat long unwinding means on the option chain — longs exiting, bearish confirmation when aligned with price.
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Max Pain Explained: Where Options Expire WorthlessLearn how max pain is calculated, why expiry week gravitates toward it, and how Nifty options traders use max pain in intraday planning.
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OI Analysis Guide — Beginner to Intraday ProThree-layer OI analysis — strike, index PCR, time series tools.
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OI Increase Price Increase Meaning — Full MatrixFour-quadrant OI-price matrix for calls and puts.
Comparison5 min
OI vs Volume: Which Matters More for Intraday?OI vs volume — when open interest vs volume leads on Nifty option chain intraday.
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Option Chain OI Tricks — 7 Intraday HacksPractical OI tricks — ATM focus, max pain drift, PCR divergence.
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PCR Explained: Put-Call Ratio for Option Trading SentimentUnderstand put-call ratio (PCR), how to read it on Nifty and Bank Nifty, and why PCR analysis matters for intraday bias.
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PCR vs Max Pain: Which Indicator Should You Trust?Compare PCR (put-call ratio) and max pain for Nifty options — what each measures, when they agree, when they conflict, and how to use both on expiry week and trend days.
Comparison5 min
Put Writing vs Put BuyingPut writing vs put buying — hedging vs speculation on index options.
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Short Covering: When Bears Buy BackShort covering in index options — price rising with falling OI — and how to spot fragile rallies in Nifty intraday trading.
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What Is Call Writing?Call writing meaning — who sells calls, risks, chain examples.
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What Is Put Writing?Put writing — income, assignment risk, put OI below spot.

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