Practise options trading on any market day since 2017
Replay the real option chains of NIFTY, BANKNIFTY and 330+ F&O stocks minute by minute. Place trades, move the clock, and watch your P&L, Greeks and NSE margin play out — or backtest a strategy over every trading day since 2017 in a few seconds.
Free · Continue with Google in one click · Runs in your browser, on desktop and mobile
- Minute-by-minute history
- Jan 2017
- F&O stocks, plus 6 indices
- 330+
- One-click strategies
- 36
- NSE SPAN + exposure margins
- Exact
Features
Everything a real trading day throws at you
The same chain, prices, lot sizes and margins you would have faced that day, with the tools to plan, test and review a trade.
The real chain, any minute
Prices, OI, IV and Greeks for every strike as they stood at the minute you pick, with that day's lot sizes.
Stops that fire when they would have
Every minute's high and low is checked, even when you skip an hour; 1-second data decides which came first.
Real NSE margins
SPAN and exposure margin from NSE Clearing's own files for that day, not a rough percentage of spot.
Hold overnight, or to expiry
Carry positions day to day, or run them to expiry in one click; expiring options settle at the close.
Strategy Finder
Pick a view and your limits; it ranks thousands of strike combinations by POP, risk:reward and max loss.
36 ready-made strategies
Straddles, strangles, condors, butterflies, ratios, calendars and futures hedges, sized by delta in a click.
Payoff, Greeks and what-ifs
Expiry and today curves, IV and date sliders, risk:reward and OI behind the curve; leave any leg out.
Replay charts
The index or any contract you trade, your P&L and premium path, the ATM straddle with IV, OI by strike.
Save, journal, share
Sessions stay in your browser with notes; export your journal as CSV or share a session as a link.
Backtester
Nine years of trading days, tested in seconds
Describe a strategy once and run it on every trading day since 2017 — on the indices and 200+ F&O stocks — with the same data and the same fills as the simulator, so any trade opens there for a minute-by-minute replay.
- Strikes by ATM offset, delta or premium
- Intraday, or held over days to expiry
- Stop-loss and target per leg, in % or points
- Trailing stops and re-entries after a stop
- A ₹ stop and target for the whole strategy
- Stop and target in one minute: 1-second data decides
- Brokerage, STT, exchange fees, GST and slippage
- Return on the real NSE margin, trade by trade
- Strategies saved to your account, compared side by side
- Sweep one setting to see how much it matters
- NIFTY days since 2017
- 2,280+
- A two-leg strategy
- about 2 s
- Fills vs the simulator
- to the paisa
How it works
Three steps, any day in history
- 1
Pick a day
NIFTY, BANKNIFTY, FINNIFTY, MIDCPNIFTY, SENSEX, BANKEX or any F&O stock, on any trading day back to 2017.
- 2
Trade from the chain
Buy or sell any strike at its real price, add a ready-made strategy, or let the Finder rank them for you.
- 3
Move the clock
Step a minute at a time, auto-play, or hold to expiry. P&L, Greeks, stops and margin update as the day unfolds.
Accuracy
Built to be exact, not roughly right
- Lot sizes and expiry dates as they were on that day, read from exchange records, never assumed
- Margins from NSE Clearing's SPAN file of the previous close, plus the exposure margin NSE set
- Stops and targets checked inside every minute, with 1-second data to order them
- Positions held to expiry settle against the official closing price
- Trading hours as they were: F&O moved its close to 3:40 pm in August 2026
NIFTY 25,650 straddle sold at 10:00 on 18 Feb 2026, held to the 24 Feb expiry. One lot of 65.
- Call sold at 155.85, expired worthless
- +₹10,130
- Put sold at 130.75, settled at 189.75
- −₹3,835
- Close on expiry day
- 25,460.25
- Result
- +₹6,295
One click on “To expiry” in the simulator. Before costs.
FAQ
Questions, answered
Is it free?
Yes. The simulator and the backtester are free to use; you just need a free account.
Which markets are covered?
NIFTY and BANKNIFTY options from January 2017, FINNIFTY from 2021, MIDCPNIFTY from 2023, SENSEX and BANKEX from 2024, and more than 330 F&O stocks, including ones that have since left the F&O list.
At what price are my trades filled?
At the last traded price of the minute on the clock, and you can type your own price instead. Stops and targets fill at their level, or at the next available price if the market gapped through them.
How accurate are the margins?
They are calculated from NSE Clearing's SPAN risk file of the previous trading day plus the exposure margin NSE published, the same inputs brokers use. Brokers may add their own buffer on top.
Do I need an account?
Yes, a free one: continue with Google in one click, or sign up with your email. Your open session and the sessions you save stay in your browser, and a share link carries the positions to anyone you send it to.
What does the backtester do?
It runs one strategy over the dates you choose — one trade a day, or one per expiry held over several days — on NIFTY, BANKNIFTY, FINNIFTY, MIDCPNIFTY or any of 200+ F&O stocks, and adds up the results after costs. Strikes can follow ATM, delta or premium; legs can have stops, targets, trailing stops and re-entries. Each trade's NSE margin is worked out too, so you see the return on the money it tied up. Save strategies to your account, compare them side by side, or sweep one setting across several values. Every trade can be opened in the simulator to replay it minute by minute.
How are backtest costs worked out?
Each order pays your brokerage (₹20 an order by default, or per lot), plus STT, exchange charges, the SEBI fee, GST and stamp duty at today's rates, and slippage as a percentage of the price. You can change or switch off each of them.
Does it work on a phone?
Yes. The simulator and the backtester run on phones and tablets as well as desktops.
Is this investment advice?
No. Algrow replays history for learning and research; past prices don't predict future ones. Please read the risk disclaimer. Risk disclaimer
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