Demand & supply are the building blocks of the Technical Analysis, all indicators are made to understand D&S much better. I observe this on charts with simple horizontal lines and behaviour of the market participants.
Demand and Supply are different for different time frame trades i.e. Long term, Short term and extra short term. The maximum fun is when all long & short time frame converge in terms of demand / supply zones.
I will take time during my webinar to explain and show how I use these tools to understand markets and trade.