An option simulator is a tool that lets you place and manage options trades on real market data without using real money. Most option simulators in India replay a past trading day minute by minute, so you can watch how premiums, Greeks and P&L would have moved.
This matters because option prices react fast to time decay, volatility and sudden market moves. A strategy that looks safe on a payoff chart can still lose money on a gap opening or an expiry-day spike.
Below, we compare 7 option simulators used by Indian traders, free and paid, on replay data, instruments covered, multi-leg support and price.
What Is an Option Simulator?
An options simulator recreates market conditions so you can test a trade before you risk capital. There are two main types, and they answer different questions.
A historical replay simulator loads a past trading day and plays it back, so you can test how your strategy would have behaved on that exact day.
A live paper trading simulator uses today's live prices, so you can practise in real time but cannot go back to a past event like a budget day or an expiry.
The best option simulator for most traders offers historical replay first, because it lets you test many market days in one sitting. Live paper trading is a useful second step before you go live.
Best Option Simulators in India: Comparison Table
Prices as of October 2026. Plans change often, so check each platform before you subscribe.
AlgoTest is the only platform here that combines a free historical replay simulator with backtesting, forward testing and live execution.
StockMojo and NiftyTrader are the quickest free options for a one-off replay, while Opify is the lowest-priced paid tool for index traders. Sensibull suits Zerodha users who only want live practice, not past-day testing.
Option Simulator Overviews
1. AlgoTest Overview
The AlgoTest Option Simulator replays real historical option chain data, so you can trade a past market day as if it were live. It sits inside the same platform you use to backtest, forward test and deploy a strategy.
You can replay index options on Nifty, Bank Nifty, FinNifty, Midcap Nifty, Sensex and Bankex, plus individual stock options.
You can build multi-leg strategies such as straddles, strangles, spreads and calendar spreads, and mix futures with options.
Delta, Gamma, Theta and Vega update as the replay moves, so you see how your Greeks shift during the day.
You can adjust, square off or add legs mid-replay, and control the replay speed.
The payoff graph shows max profit, max loss, risk-reward and breakeven for the live position.
When a setup works in the simulator, you can run a full options backtest across 7.5+ years of data, then forward test it with paper trading before going live.
Best for: Traders who want one free option simulator that connects to backtesting, paper trading and live algo execution.
2. StockMock Overview
StockMock is one of the best-known options simulators in India and ranks first for "options simulator" searches. It focuses on historical replay and backtesting for index options.
It replays index options on Nifty, Bank Nifty, FinNifty, Sensex and other indices, with data from January 2021.
It supports multi-leg strategies with manual leg edits during the replay.
It shows a payoff graph and Greeks for the active strategy.
Backtesting and the strategy builder are separate tools, and there is no forward testing or live execution.
Best for: Index option traders who want a dedicated replay tool and do not need to automate their strategy.
See the full StockMock vs AlgoTest option simulator comparison.
3. StockMojo Overview
StockMojo is a newer free option simulator that has quickly climbed to the top of search results. It covers more stock options than most tools in this list.
It replays 7 indices, including Nifty, Bank Nifty, Sensex, Bankex, FinNifty, Midcap Nifty and Nifty Next 50, plus 200+ NSE F&O stocks.
You can step through the day in 1-minute, 5-minute, 15-minute, 1-hour or 1-day jumps, or use autoplay.
It offers ready-made templates such as short straddle, iron condor and jade lizard, along with custom multi-leg positions.
The core simulator is free and needs no broker account, while extended history and saved strategies need a paid plan.
Results exclude brokerage, STT, exchange charges and slippage, so you need to subtract those costs yourself.
Best for: Traders who want a free replay of stock options or less common indices like Nifty Next 50.
4. NiftyTrader Overview
NiftyTrader is a market data site that added a free options simulator for index options. It is quick to start and needs no signup.
It covers Nifty, Bank Nifty, FinNifty, Sensex and Midcap Nifty, on weekly and monthly expiries.
It includes 9 quick-start setups and 10 prebuilt strategies, plus custom legs.
Greeks update during the replay, and you can set slippage and brokerage assumptions.
Replay moves in steps from 5 minutes to 1 day, with autoplay from 9:15 AM to 3:40 PM.
Free users get only the current month of data, and 4+ years of history needs the Prime plan.
Best for: Traders who want a free, no-signup simulator to test a recent market day.
5. Opify Overview
Opify is an options analysis platform built only for index options. It combines a simulator with option chain and OI tools at a low monthly price.
It covers Nifty, Bank Nifty and Sensex, and does not offer stock options data.
Its simulator works on historical and live data, with intraday replay and bar replay.
It tracks leg-wise P&L, Greeks and OI for each strategy.
Nifty and Bank Nifty data goes back to January 2023, and Sensex data to May 2024.
Premium costs ₹249/month after a 7-day free trial.
Best for: Index traders on a budget who want a simulator and OI analysis in one tool.
6. Opstra (Definedge) Overview
Opstra is an options analytics platform from Definedge Securities. It is known for deep volatility and Greeks analysis rather than execution.
Its full options simulator and backtesting, including intraday simulation, are part of the Pro plan.
The free Basic plan limits the strategy builder to 2 trades in a portfolio.
It offers detailed IV charts, Greeks analysis, OI dashboards and payoff charts.
It is built for analysis, so there is no live algo execution from your simulated strategy.
Best for: Experienced traders who want deep volatility analysis and are ready to pay for the Pro plan.
Read our Opstra simulator vs AlgoTest simulator comparison for a closer look.
7. Sensibull Overview
Sensibull is a popular options platform with a strong strategy builder and live paper trading. It does not replay past market days.
Its practice tool, Draft Portfolios, lets you track virtual trades on live prices.
It has a beginner-friendly strategy builder with payoff graphs.
It is free for Zerodha customers, while users of other brokers pay for Pro.
Without historical replay, you cannot test how a strategy would have handled a past expiry or event day.
Best for: Zerodha users who want simple live practice before placing real trades.
See how the two compare in AlgoTest vs Sensibull.
How to Choose the Best Option Simulator in India
The right options trading simulator depends on what you want to test. Check these five points before you pick one.
Choose a historical replay simulator if you want to test past days such as expiry days, budget days or gap openings.
Check that the simulator covers the instruments you trade, since some tools offer only index options while others include stock options.
Look at how far back the data goes, because a few months of history will not show how a strategy handles different market conditions.
Make sure you can build and adjust multi-leg positions mid-replay, since most real option strategies use more than one leg.
Account for costs, because many simulators leave out brokerage, taxes and slippage, which can turn a small simulated profit into a real loss.
It also helps to think about what comes after the simulator. If a strategy works, you will want to backtest it across years of data and then run it live without rebuilding it on another platform.
Why Choose AlgoTest as Your Option Simulator
Most simulators here cover one step. AlgoTest covers all of them, from the first replay to a live strategy.
Start free on real historical option chain data, with no broker account needed.
Simulate six indices and stock options in one place.
Turn a simulated trade into a rule-based strategy and backtest it on 7.5+ years of data.
Forward test it with paper trading on live prices.
Deploy it through 70+ brokers without rebuilding it elsewhere.
Fewer tool switches mean fewer mistakes. The strategy you test is the strategy you trade.
Practise the Trade Before You Place It
A simulator is most useful when you treat each replay as a test of one clear strategy. Define the market context, your entry, your exit and the risk on the position, then replay it across calm days, trending days and expiry days before you judge it.
AlgoTest helps you move from an idea to a strategy you can inspect and test before deciding whether to deploy.
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Related Reading
FAQs
Which is the best option simulator in India?
AlgoTest is the best option simulator in India for most traders because it combines free historical replay with backtesting, paper trading and live execution. StockMojo and NiftyTrader are good free alternatives for quick replays.
Is there a free option simulator in India?
Yes. AlgoTest, StockMojo and NiftyTrader all offer a free options simulator. NiftyTrader's free version covers only the current month of data, and StockMojo charges for extended history.
What is the difference between an option simulator and paper trading?
An option simulator usually replays past market days, so you can test a strategy on a specific date. Paper trading uses live prices, so you practise in real time but cannot go back to a past event.
Can I use an option simulator for backtesting?
A simulator lets you test a strategy manually, one day at a time. A backtest runs fixed rules across months or years of data automatically, so it gives a fuller picture of how a strategy performs.
Which option simulators cover Sensex options?
AlgoTest, StockMock, StockMojo, NiftyTrader and Opify all cover Sensex options. Opify's Sensex data starts from May 2024.
Do option simulator results include brokerage and slippage?
Not always. Many simulators show results before brokerage, taxes and slippage, so subtract these costs before you decide a strategy is profitable.