Orderflow Trading or Order flow trading forex is basically a complicated way of looking at plain old support and resistance trading.
Studying and understanding Orderflow was probably one of the biggest Eureka moments in my extensive trading education, orederflow analysis is a whole different ballgame than what we do as support and resistance traders but at the end of the day the price reverses long when buy orders exceed sell orders and vice versa for short trades.
A lack of sell orders just means the price is supported, a lack or buy orders means the price has exceeded fair value and has hit resistance, why complicate matters really?
Everything you need to know about the flow of orders in the markets can be gleaned from watching the price action on the charts.
Below is how I understand Order flow as seen on naked charts.