What Is a Trendline? Trendlines are easily recognizable lines that traders draw on charts to connect a series of prices together or show some data's best fit. The resulting line is then used to give the trader a good idea of the direction in which an investment's value might move.
	
		
			
		
		
	
				
			 
	 
  
  
 
		 
 
		 
 
		