Understand the markets before you risk a rupee.
I build free, structured knowledge bases that teach the mechanics and the risk of trading — options, trading strategies, the option Greeks, technical indicators, volatility, expiry and settlement, algorithmic trading, backtesting, risk management and trading psychology — with original diagrams and Nifty & Bank Nifty examples. No tips, no calls, no paywall.
Quick Answer
bulansarkar.com is a network of ten free educational websites covering the Indian F&O market — options, strategies, the Greeks, indicators, volatility, expiry, algo trading, backtesting, risk management and trading psychology. Every site is answer-first, India-focused and advertisement-free, and none of it is investment advice. If derivatives are new to you, start with OptionsGyan.
The network
Ten focused knowledge bases — each goes deep on one subject. Pick the one that answers your question.
OptionsGyan
Start here if options are new: what a call and a put really are, how the option chain works, and how premium, strike and expiry fit together.
Visit OptionsGyan →GreeksGyan
Master the option Greeks — Delta, Gamma, Theta, Vega and Rho — with formulas, original diagrams and Nifty worked examples.
Visit GreeksGyan →StrategyGyan
Every option and futures strategy, explained properly — payoff diagrams, Greek exposure, and the maximum loss stated as a formula and as a number.
Visit StrategyGyan →IndicatorsGyan
The Wikipedia of technical indicators — RSI, MACD, moving averages, Bollinger Bands, ATR, ADX and more, for the Indian market.
Visit IndicatorsGyan →VolatilityGyan
The Wikipedia of volatility — implied, historical and realised vol, the smile, the skew, the surface, the term structure and India VIX, with computed diagrams and free calculators.
Visit VolatilityGyan →ExpiryGyan
Everything that happens when a contract expires — weekly and monthly expiry, cash vs physical settlement, pin risk, max pain and the Greeks near expiry, with original diagrams, tools and Nifty examples.
Visit ExpiryGyan →AlgoTradeGyan
The Wikipedia of algorithmic trading — strategy design, trading-system architecture, risk management, execution, market data and broker-API automation, with original diagrams, calculators and Indian-market examples.
Visit AlgoTradeGyan →BacktestGyan
The Wikipedia of backtesting — how to validate a trading strategy honestly, with every performance metric (Sharpe, Sortino, Calmar, drawdown), robustness tests (walk-forward, Monte Carlo, out-of-sample) and the biases that make backtests lie, plus 15 in-browser tools and original diagrams.
Visit BacktestGyan →RiskManagementGyan
The Wikipedia of trading risk management — capital preservation, position sizing, risk metrics (drawdown, risk of ruin, Sharpe, VaR), portfolio, options and algorithmic risk, and trader discipline, with original diagrams, in-browser risk calculators and Indian-market examples.
Visit RiskManagementGyan →TradingPsychologyGyan
The Wikipedia of trading psychology — behavioural biases (loss aversion, overconfidence, herd mentality), emotional control (fear, greed, FOMO, revenge trading), decision making under uncertainty, discipline, trading routines and behavioural finance, with original diagrams and free journal, checklist and review tools.
Visit TradingPsychologyGyan →Where should I start?
Not sure which site you need? Follow the path that fits you.
What this network stands for
Genuinely free
No paywall, no login, no ads, no "sure-shot calls". Just education, held to a documented standard.
Independent
No affiliation with any broker, adviser or product issuer. Nothing here is a recommendation.
Original diagrams
Every chart and payoff is computed and drawn from scratch — no stock images, no black boxes.
India-first
Examples use Nifty, Bank Nifty, NSE realities and Indian lot sizes — not generic US tickers.
About Bulan Sarkar
I'm Bulan Sarkar. I build these sites because too many people in India trade before they understand what they are trading. The material aimed at retail traders is often too shallow, too jargon-heavy, or thinly disguised marketing for tips. This network is the opposite of that — calm, structured, advertisement-free reference libraries that teach the theory and, above all, the risk, using Indian-market examples.
The goal is not to make you trade more. It is to help you understand the risk you are taking — and sometimes, to help you decide not to take a bad trade. Every site documents how its content is produced, sourced and corrected.
Questions, corrections or feedback? Email [email protected].