Opstra, from Definedge in Pune, is a well-liked options analytics app: a strategy builder, backtesting on years of data, an options simulator and good volatility tools. If you are weighing an Opstra alternative, the questions are usually price, how fresh the open interest is and what else you get. This guide answers all three and lists the twelve tools in OIData that Opstra does not list.
We make OIData, so this is our side of the comparison. Every Opstra fact comes from Opstra’s plans page, including its FAQ, read on 23 October 2026.
Opstra alternative at a glance
| OIData | Opstra | |
|---|---|---|
| Monthly | ₹1189 a month | ₹1300 a month + GST |
| Six months | Monthly or yearly only | ₹6000 + GST |
| Yearly | ₹10,701 a year | ₹11,000 + GST |
| A tier that costs nothing | No: one paid plan | Basic, with data updated every 15 minutes |
| How fresh | Dealer Positioning every minute, Trending OI Screener every 30 seconds, Session Chart price every 15 seconds | One-minute data; open interest every 3 minutes |
| SENSEX and BANKEX | In the same app | On a separate Definedge site |
| Dealer positioning and GEX | Yes | Not listed |
| Opening and closing auction trackers | Yes | Not listed |
| Market Mood Index | Yes | Not listed |
| AI news read | Yes | Not listed |
| Alerts | Up to 20 rules, on Telegram | Not listed |
| Strategy builder, backtesting, simulator | No | Yes |
| IV surface and skew | Yes | Yes |
“Not listed” means Opstra’s plans page did not list the tool on 23 October 2026.
Fresher open interest
Opstra’s FAQ is clear about its timing: its live data is one-minute data plus a few seconds for IV and Greeks, open interest updates every 3 minutes, and the Basic tier updates every 15 minutes. In OIData the dealer gamma levels refresh every minute, the Trending OI Screener every 30 seconds, and the Session Chart moves price every 15 seconds with the levels every minute. There is no delayed tier: every tool runs live through market hours, through your own broker connection. For many traders that timing is the main reason to look for an Opstra alternative.
12 tools in OIData that Opstra doesn’t list
These are the reasons to pick an Opstra alternative for reading the market. Each is in OIData’s one plan.
1. Dealer Positioning
Dealer Positioning estimates dealer gamma exposure (GEX) at every strike of NIFTY, SENSEX and stock options. From it come the call wall, the put wall, the gamma flip, pin conviction and the hedge ladder, refreshed every minute. The GEX guide explains each level in plain English.
2. GEX Screener
The GEX Screener ranks every NSE F&O stock by net dealer gamma, flags short-gamma names and shows each one’s walls, pin conviction and intraday gamma trend.
3. Session Chart with the levels drawn
Opstra’s futures intraday chart plots price, open interest, PCR, volume and max pain. OIData’s Session Chart draws the call wall, put wall, pin, gamma flip and expected move on minute candles for NIFTY, BANKNIFTY, SENSEX and F&O stocks. The Session Chart guide reads one session bar by bar.
4. Opening Auction
Opening Auction follows the 09:00–09:15 pre-open for NIFTY and SENSEX, measures the opening print against the auction and futures-implied cash, and checks at 09:30 whether the gap is filling.
5. Closing Auction
Closing Auction covers the 15:15 index freeze, the auction print, the futures fair close and the expiry settlement risk.
6. Market Mood Index
Market Mood is a transparent 0–100 fear and greed gauge built from FII positioning, India VIX, skew, momentum, breadth and gold demand.
7. An AI news read and the GIFT NIFTY open
The Dashboard shows the next open implied by GIFT NIFTY and what is moving the market right now, each with an AI news read in a few plain sentences.
8. A pre-open brief and an end-of-day digest
At 08:45 the pre-open brief arrives by email or Telegram with the GIFT-implied open and the levels to watch; at 16:15 the digest sums up the session.
9. Alerts on Telegram
Alerts watch up to 20 rules: PCR crosses, OI spikes, max pain shifts, OI walls, gamma flips and GIFT pre-open gaps, sent to Telegram when they trigger.
10. Trending OI Screener
Opstra’s Options Dashboard gives a bird’s-eye view of options data for every F&O name. OIData’s Trending OI Screener ranks every F&O stock by Day Strength, the put and call open interest added since the previous close, and by Flow, the last fifteen minutes, every 30 seconds.
11. Pin, decay and the expected move on Expiry Day
Opstra has straddle charts and max pain. OIData’s Expiry Day page adds where the index may pin, the at-the-money straddle’s decay against its model and the expected-move band.
12. Seasonals
Seasonals overlays each year’s path from January to December for NIFTY, SENSEX, BANKNIFTY, India VIX and every F&O stock, with up to 10 years of history.
Everything else in OIData’s one plan
An Opstra alternative also has to cover the everyday work. These come in the same plan, including the volatility tools Opstra users will know:
- Volatility: India VIX against realized volatility, the IV surface, term structure and skew, and the range option prices imply.
- Option Chain: strike-level call and put open interest, prices and changes for index and stock options, with replay that rewinds any recorded session.
- Trending OI: open interest momentum across strikes, with OI changes, direction and day high and low breaks.
- OI Stats: call and put open interest at every strike side by side, with a time slider that replays the session.
- Strike History: one strike day by day from listing to expiry, with its premium, open interest and build-up.
- Futures OI: intraday futures open interest and price, session build-up in lots, basis and cost of carry.
- Straddles & Strangles: a premium tracker with automatic at-the-money and custom strikes.
- Options Activity: index option strikes whose 5-minute volume bursts above their run-rate, tagged fresh opening flow or churn.
- Buildup Screener: long buildup, short buildup, unwinding and short covering across the F&O list, ranked by OI change.
- FII / DII Activity: FII, DII, Pro and Client positions in the cash market and F&O, daily to yearly.
- Holidays: NSE, BSE and MCX holidays on one calendar.
- Tutorials: a short video for every page.
OIData covers NIFTY, BANKNIFTY, FINNIFTY, MIDCPNIFTY, SENSEX, BANKEX and about 200 F&O stocks. It runs live through market hours through your own broker connection, and outside market hours every recorded session replays, so the tools are useful on a Sunday too. Several pages also export to CSV.
Opstra price vs OIData price
Opstra’s Basic tier costs nothing, with data updated every 15 minutes. Its premium plans, on 23 October 2026, were ₹1300 a month + GST, ₹6000 for six months + GST and ₹11,000 a year + GST.
OIData’s one plan, Ultimate, is ₹1189 a month, or ₹10,701 a year (12 months for the price of 9): less than Opstra’s listed monthly and yearly prices, with every tool live and SENSEX and BANKEX in the same app.
What Opstra does that OIData doesn’t
Opstra is strong on building and testing trades: a strategy builder and strategy charts with moving averages and Bollinger bands, options backtesting on five years of end-of-day data since 2014 across about 53 tickers, an options simulator for past expiries, an options algorithm that finds trades for your outlook, IV percentile and volatility skew screeners, the F&O ban list, a results calendar with past results timings, a heatmap and moving averages. OIData has no strategy builder, backtester or simulator. It is built for reading the market as it trades, so many traders keep Opstra for testing ideas and use an Opstra alternative like OIData for the live session.
Comparing more than one tool? See OIData vs OI Pulse, OIData vs Sensibull, OIData vs NiftyTrader and the roundup of seven OI analysis tools.
Frequently asked questions
Is OIData an Opstra alternative for backtesting?
No. OIData has no backtester or simulator. It is an Opstra alternative for reading open interest and positioning live: dealer gamma, the auctions, mood and alerts.
Is there a free Opstra alternative?
Opstra’s own Basic tier costs nothing, with 15-minute updates, and NSE’s option chain is free to view. OIData is a paid tool: ₹1189 a month, or ₹10,701 a year.
Does OIData cover SENSEX and BANKEX?
Yes, in the same app as NIFTY, BANKNIFTY, FINNIFTY, MIDCPNIFTY and about 200 F&O stocks.
Does OIData give trade calls?
No. OIData is an analytics tool: it shows data and indicators, never tips, and never places orders. Read the data, then decide for yourself.
Where does OIData’s data come from?
Through your own broker connection, live through market hours. Outside market hours, every recorded session replays.
Try an Opstra alternative that stays live
OIData’s one plan, Ultimate, includes every tool above: ₹1189 a month, or ₹10,701 a year, which is 12 months for the price of 9. That is about ₹57 a trading day. Cancel anytime from your account page; a cancelled plan stays active until the end of the period you paid for. See the plan, or watch the video tutorials to see every page first.