About the author
This network is written and maintained by Bulan Sarkar.
Every site in this network is written and maintained by Bulan Sarkar, a markets educator who built these resources to fix a specific gap: clear, rigorous, India-specific teaching on how derivatives and technical analysis actually work. The goal is not to predict markets but to help traders understand the risk they are carrying.
Editorial approach
Every explainer is drafted from first principles, checked against the standard theory — the Black-Scholes-Merton framework for options, the original published definitions for indicators — and grounded in realistic Nifty and Bank Nifty examples. Where a claim is a rule of thumb (for example, Delta as a probability proxy), it is labelled as such.
How to reach out
Corrections, questions and feedback are welcome via the contact page. Read our Editorial Policy and Methodology for how content is produced and reviewed.
Published 9 July 2026.