Volume refers to the quantity of traded units in a financial security such as a stock, commodity or futures. Many technical analysts rely on it as it is a telling indicator of demand and supply in a traded security.  When the price of a security rises on low volume, it is sign that the move is unsustainable.
How to interpret price volume action?
 
 
       
       
       
       IMAGE OF PRICE n volumerising
    
      
       
        
           
   
        
        
        IMAGE of price moving down and volume moving down
        
           
   
           
           When the price of the security and volume moves together, that is taken to be a bullish sign as in the scenarios above.
 
   
           
Let us examine 2 more scenarios shown below.
    
      
       
        
           
   
IMAGE of rising price and falling volume
    
      
       
        
           
   
           
           IMAGE of price falling with increasing volume>
 
  
When volume and price have a trend divergence as in the 2 scenarios above, it is a bearish sign.