[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"post:what-to-look-for-in-an-open-interest-analysis-tool":3},{"id":4,"slug":5,"title":6,"excerpt":7,"imageUrl":8,"tags":9,"createdAt":14,"updatedAt":14,"wordCount":15,"readingMinutes":16,"html":17,"toc":18,"related":59,"prev":95,"next":105},"A4T7XyNjhY7uRewPqmbW","what-to-look-for-in-an-open-interest-analysis-tool","What to Look For in an Open Interest Analysis Tool","What to look for in an open interest analysis tool for NIFTY and SENSEX, from the person who built OIData: change in OI, build-ups, history, alerts and price.","https:\u002F\u002Ffirebasestorage.googleapis.com\u002Fv0\u002Fb\u002Fnarenkram-672cc.firebasestorage.app\u002Fo\u002Fblog-images%2F1791918508067-cover-oidata-tool.png?alt=media&token=9015f83c-a39f-4007-badd-68dc7bf4b05b",[10,11,12,13],"oidata","open interest","options trading","saas","2026-10-13T19:06:24.834Z",1325,6,"\u003Cp>I trade index options, and in April 2026 I launched \u003Ca href=\"https:\u002F\u002Fwww.oidata.in\u002F\">OIData\u003C\u002Fa>, my own open interest analysis tool for NIFTY, SENSEX and stock options. Building it meant deciding, page by page, what actually helps someone read open interest and what only adds more numbers to an already crowded screen.\u003C\u002Fp>\n\u003Cp>This is that list. Use it to judge any open interest analysis tool, mine included. For each point I say what to look for, why it matters, and how OIData handles it, so you can compare like with like.\u003C\u002Fp>\n\u003Ch2 id=\"first-what-open-interest-tells-you\">First, what open interest tells you\u003Ca class=\"heading-anchor\" href=\"#first-what-open-interest-tells-you\" aria-hidden=\"true\" tabindex=\"-1\">#\u003C\u002Fa>\u003C\u002Fh2>\n\u003Cp>Open interest (OI) is the number of option or futures contracts that are still open: bought and sold, and not yet closed or expired. Every contract has a buyer and a seller, so OI on its own does not say which way anyone is betting. What it does show is where positions are piling up, and because option sellers usually hold the biggest positions, traders read OI mostly from the sellers' side: lots of calls written at a strike suggests sellers expect the price to stay below it, and lots of puts written suggests they expect it to stay above.\u003C\u002Fp>\n\u003Cp>A good tool turns that raw count into something you can read in seconds. Here is what separates the useful ones from the noisy ones.\u003C\u002Fp>\n\u003Ch2 id=\"1-it-puts-the-change-in-oi-first-not-the-total\">1. It puts the change in OI first, not the total\u003Ca class=\"heading-anchor\" href=\"#1-it-puts-the-change-in-oi-first-not-the-total\" aria-hidden=\"true\" tabindex=\"-1\">#\u003C\u002Fa>\u003C\u002Fh2>\n\u003Cp>The total OI at a strike builds up over the whole life of a contract, so it mostly tells you about the past. The change since today's open tells you what is being built, or taken down, right now. A strike with a huge total and a falling OI is a level being abandoned, even if it still looks like a wall.\u003C\u002Fp>\n\u003Cp>Look for a tool that shows the change next to every total. In OIData's \u003Ca href=\"https:\u002F\u002Fwww.oidata.in\u002Foption-chain\">option chain\u003C\u002Fa>, the OI Chg column sits beside each OI figure with its percentage, and \u003Ca href=\"https:\u002F\u002Fwww.oidata.in\u002Ftrending-oi\">Trending OI\u003C\u002Fa> follows how much call and put OI has been added or removed since the open, row by row through the session.\u003C\u002Fp>\n\u003Cp>\u003Cimg src=\"\u002F_vercel\u002Fimage?url=https%3A%2F%2Ffirebasestorage.googleapis.com%2Fv0%2Fb%2Fnarenkram-672cc.firebasestorage.app%2Fo%2Fblog-content-images%252F1791918507241-option_chain.png%3Falt%3Dmedia%26token%3Dcf204351-4d85-47c4-a452-a074d0748da1&w=1600&q=75\" srcset=\"\u002F_vercel\u002Fimage?url=https%3A%2F%2Ffirebasestorage.googleapis.com%2Fv0%2Fb%2Fnarenkram-672cc.firebasestorage.app%2Fo%2Fblog-content-images%252F1791918507241-option_chain.png%3Falt%3Dmedia%26token%3Dcf204351-4d85-47c4-a452-a074d0748da1&w=640&q=75 640w, \u002F_vercel\u002Fimage?url=https%3A%2F%2Ffirebasestorage.googleapis.com%2Fv0%2Fb%2Fnarenkram-672cc.firebasestorage.app%2Fo%2Fblog-content-images%252F1791918507241-option_chain.png%3Falt%3Dmedia%26token%3Dcf204351-4d85-47c4-a452-a074d0748da1&w=960&q=75 960w, \u002F_vercel\u002Fimage?url=https%3A%2F%2Ffirebasestorage.googleapis.com%2Fv0%2Fb%2Fnarenkram-672cc.firebasestorage.app%2Fo%2Fblog-content-images%252F1791918507241-option_chain.png%3Falt%3Dmedia%26token%3Dcf204351-4d85-47c4-a452-a074d0748da1&w=1600&q=75 1600w\" sizes=\"(min-width: 760px) 720px, 100vw\" alt=\"OIData option chain for NIFTY with open interest, change in OI and build-up stripes\" loading=\"lazy\" decoding=\"async\">\u003C\u002Fp>\n\u003Cp>\u003Cem>OIData's option chain for NIFTY's 29 September 2026 expiry: calls on the left, puts on the right, the change in OI beside every total, the build-up stripe on each OI cell, and the summary chips across the top (max pain, resistance, support, PCR).\u003C\u002Fem>\u003C\u002Fp>\n\u003Ch2 id=\"2-it-reads-oi-together-with-price\">2. It reads OI together with price\u003Ca class=\"heading-anchor\" href=\"#2-it-reads-oi-together-with-price\" aria-hidden=\"true\" tabindex=\"-1\">#\u003C\u002Fa>\u003C\u002Fh2>\n\u003Cp>Because every contract has two sides, OI only becomes meaningful when you pair it with what the price did. OI up with price up is a long build-up; OI up with price down, a short build-up; OI down with price up, short covering; OI down with price down, long unwinding. A tool should do this pairing for you, at every strike, instead of leaving you to work it out across two columns.\u003C\u002Fp>\n\u003Cp>OIData marks each OI cell on the chain with a coloured stripe for one of those four readings, and its \u003Ca href=\"https:\u002F\u002Fwww.oidata.in\u002Fscreener\">Buildup Screener\u003C\u002Fa> sorts the futures of every F&O stock into the same four, biggest OI moves first.\u003C\u002Fp>\n\u003Ch2 id=\"3-it-shows-the-whole-session-not-one-snapshot\">3. It shows the whole session, not one snapshot\u003Ca class=\"heading-anchor\" href=\"#3-it-shows-the-whole-session-not-one-snapshot\" aria-hidden=\"true\" tabindex=\"-1\">#\u003C\u002Fa>\u003C\u002Fh2>\n\u003Cp>The levels that matter move during the day. A snapshot at 2 pm cannot tell you whether the biggest call strike was built at the open and defended all day, or appeared twenty minutes ago. Look for a tool that can replay a session and show how OI changed hour by hour.\u003C\u002Fp>\n\u003Cp>In OIData, the \u003Ca href=\"https:\u002F\u002Fwww.oidata.in\u002Fchart\">Session Chart\u003C\u002Fa> draws the OI levels on one-minute candles, \u003Ca href=\"https:\u002F\u002Fwww.oidata.in\u002Foi-stats\">OI Stats\u003C\u002Fa> has a time slider over the strike ladder, the option chain has a Replay mode for any recorded session, and \u003Ca href=\"https:\u002F\u002Fwww.oidata.in\u002Fstrike-history\">Strike History\u003C\u002Fa> follows one strike day by day from the day it was listed to its expiry.\u003C\u002Fp>\n\u003Ch2 id=\"4-it-covers-both-indices-you-trade-at-every-expiry\">4. It covers both indices you trade, at every expiry\u003Ca class=\"heading-anchor\" href=\"#4-it-covers-both-indices-you-trade-at-every-expiry\" aria-hidden=\"true\" tabindex=\"-1\">#\u003C\u002Fa>\u003C\u002Fh2>\n\u003Cp>Since September 2025, NIFTY's weekly options expire on Tuesdays and SENSEX's on Thursdays, so many traders now watch both. A tool that covers only NIFTY, or only the nearest expiry, leaves out half the picture.\u003C\u002Fp>\n\u003Cp>OIData's option chain covers NIFTY, BANK NIFTY, SENSEX and every F&O stock at any listed expiry.\u003C\u002Fp>\n\u003Ch2 id=\"5-it-is-fresh-and-says-where-the-numbers-come-from\">5. It is fresh, and says where the numbers come from\u003Ca class=\"heading-anchor\" href=\"#5-it-is-fresh-and-says-where-the-numbers-come-from\" aria-hidden=\"true\" tabindex=\"-1\">#\u003C\u002Fa>\u003C\u002Fh2>\n\u003Cp>Open interest changes all day as positions open and close. Ask how often a tool updates during market hours, and where its numbers come from. OIData is built around your own broker connection: you link your SEBI-registered broker account from the Broker Connections page, and OIData shows and analyses the market data available through it, refreshing roughly every 30 seconds during market hours. It never places orders.\u003C\u002Fp>\n\u003Ch2 id=\"6-it-goes-beyond-options-futures-and-participants\">6. It goes beyond options: futures and participants\u003Ca class=\"heading-anchor\" href=\"#6-it-goes-beyond-options-futures-and-participants\" aria-hidden=\"true\" tabindex=\"-1\">#\u003C\u002Fa>\u003C\u002Fh2>\n\u003Cp>Futures give a cleaner read of direction than options, because there is no ladder of strikes and no sellers to untangle: a long is a long. And after every trading day's close, NSE publishes how the market's positions are split between foreign investors (FIIs), domestic institutions (DIIs), proprietary traders and clients, which shows who is on which side.\u003C\u002Fp>\n\u003Cp>OIData's \u003Ca href=\"https:\u002F\u002Fwww.oidata.in\u002Ffutures-oi\">Futures OI\u003C\u002Fa> pairs futures OI with price, interval by interval, with the premium to spot and the cost of carry, and its \u003Ca href=\"https:\u002F\u002Fwww.oidata.in\u002Fparticipants\">FII \u002F DII Activity\u003C\u002Fa> page turns NSE's daily participant figures into net positions, changes and trends.\u003C\u002Fp>\n\u003Ch2 id=\"7-it-knows-what-expiry-day-and-volatility-do-to-oi\">7. It knows what expiry day and volatility do to OI\u003Ca class=\"heading-anchor\" href=\"#7-it-knows-what-expiry-day-and-volatility-do-to-oi\" aria-hidden=\"true\" tabindex=\"-1\">#\u003C\u002Fa>\u003C\u002Fh2>\n\u003Cp>Expiry days behave differently: time decay speeds up, positions unwind fast, and price is sometimes pulled toward the strike with the heaviest positions. And the same OI picture means something different when options are cheap than when they are expensive.\u003C\u002Fp>\n\u003Cp>OIData has an \u003Ca href=\"https:\u002F\u002Fwww.oidata.in\u002Fexpiry-day\">Expiry Day\u003C\u002Fa> page, a \u003Ca href=\"https:\u002F\u002Fwww.oidata.in\u002Fdealer-positioning\">Dealer Positioning\u003C\u002Fa> view of gamma exposure updated every minute, and a \u003Ca href=\"https:\u002F\u002Fwww.oidata.in\u002Fvolatility\">Volatility\u003C\u002Fa> page with India VIX and implied volatility across strikes.\u003C\u002Fp>\n\u003Ch2 id=\"8-it-watches-for-you\">8. It watches for you\u003Ca class=\"heading-anchor\" href=\"#8-it-watches-for-you\" aria-hidden=\"true\" tabindex=\"-1\">#\u003C\u002Fa>\u003C\u002Fh2>\n\u003Cp>Nobody can stare at an option chain for six hours. Useful alerts are specific: the put-call ratio crossing a level, a sudden jump in OI at one strike, the price nearing the strike with the most OI, or that level moving to a new strike or unwinding. OIData's alerts arrive in the app's notification bell, and on Telegram once you link it.\u003C\u002Fp>\n\u003Ch2 id=\"9-it-explains-in-plain-words-and-never-tells-you-to-buy-or-sell\">9. It explains in plain words, and never tells you to buy or sell\u003Ca class=\"heading-anchor\" href=\"#9-it-explains-in-plain-words-and-never-tells-you-to-buy-or-sell\" aria-hidden=\"true\" tabindex=\"-1\">#\u003C\u002Fa>\u003C\u002Fh2>\n\u003Cp>A good tool tells you what the numbers say, in words a busy trader can read in a second. It should not tell you what to buy or sell: in India, giving that advice is a regulated job. OIData's dashboard has an AI-written read of the day in a few plain sentences, and OIData is not a SEBI-registered investment adviser or research analyst. Everything it shows is information for your own research.\u003C\u002Fp>\n\u003Ch2 id=\"10-its-price-fits-how-often-you-trade\">10. Its price fits how often you trade\u003Ca class=\"heading-anchor\" href=\"#10-its-price-fits-how-often-you-trade\" aria-hidden=\"true\" tabindex=\"-1\">#\u003C\u002Fa>\u003C\u002Fh2>\n\u003Cp>Some traders open an OI tool twice a week; others live in it every session. OIData has one plan, Ultimate, at ₹1189 a month, or ₹10,701 a year, which is 12 months for the price of 9. That covers every page above; you can see the details on the \u003Ca href=\"https:\u002F\u002Fwww.oidata.in\u002Fpricing\">pricing page\u003C\u002Fa>.\u003C\u002Fp>\n\u003Ch2 id=\"what-no-open-interest-analysis-tool-can-do\">What no open interest analysis tool can do\u003Ca class=\"heading-anchor\" href=\"#what-no-open-interest-analysis-tool-can-do\" aria-hidden=\"true\" tabindex=\"-1\">#\u003C\u002Fa>\u003C\u002Fh2>\n\u003Cp>No tool can tell you where the market will close. A heavy call strike is a level that sellers are defending, until the day they stop. OI is context: it tells you where positions sit and how they are changing, and you still have to read it alongside price. Trading derivatives carries real risk, and a better screen does not change that.\u003C\u002Fp>\n\u003Ch2 id=\"where-to-start\">Where to start\u003Ca class=\"heading-anchor\" href=\"#where-to-start\" aria-hidden=\"true\" tabindex=\"-1\">#\u003C\u002Fa>\u003C\u002Fh2>\n\u003Cp>If you are new to reading OI, start with the change in OI on the option chain of the index you trade, and check it against price for a week before you add anything else. OIData's blog explains each idea in more depth: \u003Ca href=\"https:\u002F\u002Fwww.oidata.in\u002Fblog\u002Fwhat-is-open-interest\">what open interest is\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fwww.oidata.in\u002Fblog\u002Fchange-in-oi-explained-which-strikes-are-adding-open-interest\">change in OI\u003C\u002Fa> and \u003Ca href=\"https:\u002F\u002Fwww.oidata.in\u002Fblog\u002Foi-buildup-explained-long-buildup-short-buildup-short-covering-long-unwinding\">the four build-ups\u003C\u002Fa>. And if you want to see how I read the numbers myself, I wrote a separate post on \u003Ca href=\"https:\u002F\u002Fwww.narenkram.com\u002Fblog\u002Foi-data-explained-how-to-read-open-interest\">how to read OI data for NIFTY and SENSEX\u003C\u002Fa>.\u003C\u002Fp>\n\u003Cp>OIData is at \u003Ca href=\"https:\u002F\u002Fwww.oidata.in\u002F\">www.oidata.in\u003C\u002Fa>, and every page above carries its own guide to reading it.\u003C\u002Fp>\n",[19,23,26,29,32,35,38,41,44,47,50,53,56],{"id":20,"text":21,"level":22},"first-what-open-interest-tells-you","First, what open interest tells you",2,{"id":24,"text":25,"level":22},"1-it-puts-the-change-in-oi-first-not-the-total","1. It puts the change in OI first, not the total",{"id":27,"text":28,"level":22},"2-it-reads-oi-together-with-price","2. It reads OI together with price",{"id":30,"text":31,"level":22},"3-it-shows-the-whole-session-not-one-snapshot","3. It shows the whole session, not one snapshot",{"id":33,"text":34,"level":22},"4-it-covers-both-indices-you-trade-at-every-expiry","4. It covers both indices you trade, at every expiry",{"id":36,"text":37,"level":22},"5-it-is-fresh-and-says-where-the-numbers-come-from","5. It is fresh, and says where the numbers come from",{"id":39,"text":40,"level":22},"6-it-goes-beyond-options-futures-and-participants","6. It goes beyond options: futures and participants",{"id":42,"text":43,"level":22},"7-it-knows-what-expiry-day-and-volatility-do-to-oi","7. It knows what expiry day and volatility do to OI",{"id":45,"text":46,"level":22},"8-it-watches-for-you","8. It watches for you",{"id":48,"text":49,"level":22},"9-it-explains-in-plain-words-and-never-tells-you-to-buy-or-sell","9. It explains in plain words, and never tells you to buy or sell",{"id":51,"text":52,"level":22},"10-its-price-fits-how-often-you-trade","10. Its price fits how often you trade",{"id":54,"text":55,"level":22},"what-no-open-interest-analysis-tool-can-do","What no open interest analysis tool can do",{"id":57,"text":58,"level":22},"where-to-start","Where to start",[60,74,85],{"id":61,"slug":62,"title":63,"excerpt":64,"imageUrl":65,"tags":66,"createdAt":70,"updatedAt":71,"wordCount":72,"readingMinutes":73},"MPA3neju03I2YggNl29r","interactive-product-demo-examples","Interactive Product Demo Examples I Built for My Own Apps","Interactive product demo examples I made for my own apps, OIData and ShotDemo: how each was built, what every step says, and what to copy for your own demo.","https:\u002F\u002Ffirebasestorage.googleapis.com\u002Fv0\u002Fb\u002Fnarenkram-672cc.firebasestorage.app\u002Fo\u002Fblog-images%2F1791918510371-cover-shotdemo-examples.png?alt=media&token=0e42a4e9-8131-4193-9e05-1e7ab85ea976",[67,68,69,13],"shotdemo","interactive demo","product demo","2026-10-13T19:04:24.834Z","2026-10-28T08:45:49.597Z",1447,7,{"id":75,"slug":76,"title":77,"excerpt":78,"imageUrl":79,"tags":80,"createdAt":82,"updatedAt":83,"wordCount":84,"readingMinutes":16},"CqLfvKRPgpOTIgxQQ9wL","supademo-alternative-you-pay-for-once","Why I Built a Supademo Alternative You Pay for Once","Why ShotDemo is a Supademo alternative you pay for once: $12 per demo instead of per creator each month, what it does, and when Supademo fits better.","https:\u002F\u002Ffirebasestorage.googleapis.com\u002Fv0\u002Fb\u002Fnarenkram-672cc.firebasestorage.app\u002Fo\u002Fblog-images%2F1791918511893-cover-shotdemo-alternative.png?alt=media&token=d211c534-8d2b-4ae4-be59-651434b3d72e",[67,68,81,13],"supademo alternative","2026-10-13T19:03:24.834Z","2026-10-28T08:45:49.930Z",1266,{"id":86,"slug":87,"title":88,"excerpt":89,"imageUrl":90,"tags":91,"createdAt":93,"updatedAt":93,"wordCount":94,"readingMinutes":22},"bPd5z7rNGEDtt2PV9mWF","open-interest-data-analysis-app-launching-my-2nd-saas","Open Interest Data Analysis App - Launching my 2nd SaaS","After transitioning away from trade execution tools, I realized the real edge in options scalping isn't just about how fast you can click \"buy,\" but how clearly you can read the market's hidden forces. Today, I'm thrilled to announce the beta launch of my second SaaS: OIData.","https:\u002F\u002Ffirebasestorage.googleapis.com\u002Fv0\u002Fb\u002Fnarenkram-672cc.firebasestorage.app\u002Fo\u002Fblog-images%2F1776094322453-oidata.png?alt=media&token=7053306a-1b0b-4ea0-8dfe-490fe69b2750",[13,92],"startup","2026-04-13T03:21:00.000Z",483,{"id":96,"slug":97,"title":98,"excerpt":99,"imageUrl":100,"tags":101,"createdAt":103,"updatedAt":103,"wordCount":104,"readingMinutes":16},"3xmeGZNNPxBfEt7TVs4d","oi-data-explained-how-to-read-open-interest","OI Data Explained: How to Read Open Interest for NIFTY and SENSEX","OI data explained: what open interest is, where the numbers come from, and five ways to read it for NIFTY and SENSEX, from change in OI to PCR and futures.","https:\u002F\u002Ffirebasestorage.googleapis.com\u002Fv0\u002Fb\u002Fnarenkram-672cc.firebasestorage.app\u002Fo\u002Fblog-images%2F1791918508950-cover-oidata-oi-data.png?alt=media&token=672b7ebd-2271-48cb-8e4d-a5c6bbe66a4d",[10,11,102,12],"nifty","2026-10-13T19:05:24.834Z",1308,{"id":106,"slug":107,"title":108,"excerpt":109,"imageUrl":110,"tags":111,"createdAt":116,"updatedAt":116,"wordCount":117,"readingMinutes":73},"aefh99XB8pVCnAH1HwXr","question-mark-in-digital-signature-how-to-remove-it","Question Mark in a Digital Signature: How to Remove It","The yellow question mark on e-Aadhaar, birth certificates and e-PAN is a picture stored in the PDF. Why it appears, and how to get a copy with the green tick.","https:\u002F\u002Ffirebasestorage.googleapis.com\u002Fv0\u002Fb\u002Fnarenkram-672cc.firebasestorage.app\u002Fo\u002Fblog-images%2F1791918506156-cover-signvalid-question-mark.png?alt=media&token=536a3026-f633-4c44-b3d9-0225db3b8bd0",[112,113,114,115],"signvalid","digital signature","aadhaar","how-to","2026-10-13T19:07:24.834Z",1444]