code: def add_support(self,date,on='low',mode='starttoend',text=None,**kwargs):
  		
  		d={'kind':'support','date':date,'mode':mode,'on':on,'text':text}
  		d.update(**kwargs)
  		self.trendlines.append(d)
docs: Adds a support line to the QuantFigure
  
  		Parameters:
  			date0 : string
  				The support line will be drawn at the 'y' level 
  				value that corresponds to this date. 
  			on : string
  				Indicate the data series in which the 
  				support line should be based.
  					'close'
  					'high'
  					'low'
  					'open'
  			mode : string
  				Defines how the support/resistance will 
  				be drawn
  					'starttoened' : (x0,x1)
  					'fromstart' : (x0,date)
  					'toend' : (date,x1)
  			text : string
  				If passed, then an annotation will be added 
  				to the support line (at mid point)
  		
  		kwargs:	
  			from_strfmt : string
  				Defines the date formating in which 
  				date0 and date1 are stated. 
  				default: '%d%b%y'					
  			to_strfmt : string
  				Defines the date formatting 
  				to which it should be converted. 
  				This should match the same format as the timeseries index. 
  				default : '%Y-%m-%d'