What is this indicator?
Measures the average buying and selling pressure based on volume and where price closes over a given period. Crossing the zero line is usually read as a shift in the dominant direction of money flow.
How to read the chart
A rise happening alongside price movement confirms that move's validity; a divergence between volume and price is often a sign of a weakening trend.
Practical tip
Always check volume alongside price movement; volume on its own, without regard to the price trend, isn't a reliable signal.