Blog

Analysis of the NSE Closing Auction Session (CAS) methodology change. First-week data observations on the Nifty cash close, expiry settlement, and 0DTE options volatility.

From 3 August 2026, CAS-eligible cash stocks stop continuous trading at 3:15 PM and enter the Closing Auction Session. Futures and options continue trading until 3:40 PM. This note maps what changes for late-day derivative positions, how stock-futures price bands reset, what remains visible in Orderflow, and why the actual index and indicative closing value must be read separately during the final 25 minutes.

Location, intent, and acceptance determine whether size moves Nifty. How Market Profile, Order Flow, MFLOW, and the Options Table read the same print differently.

Order routing labels change. The auction does not. How Order Flow, IB/IS, Smart Candlesticks, and MFLOW read intent at the point of trade on NSE and BSE.

NSE reclassified API orders as algo from April 2026. The routing label changed. Order Flow, MFLOW, and Smart Candlesticks still read intent the same way

The Vtrender Charts free plan gives Market Profile for Nifty, BankNifty, Sensex, and Bankex — the foundation layer before Order Flow and options tools.

How Order Flow and PLR help NSE and BSE traders read supply, demand, initiative activity, and the path of least resistance on Vtrender Charts.

Learn how NTM VolX and VXR range reveal near-the-money options pressure, buyer control, seller control and range shifts on NIFTY.

Learn the Gamma 3 framework: Gamma Density, Gamma Exposure and Convexity for reading NIFTY options positioning and risk.