Intraday Session Framework (ISF) vs Opening Range

The Intraday Session Framework (ISF) is a structured day trading methodology that organises each session around defined windows, daily bias, pre-mapped key levels, and rules-based execution before, during, and after trading.

The Opening Range is the high and low price boundary established during the first defined period of a trading session, typically the first 15 to 30 minutes, which sets the initial reference framework for intraday trading decisions.