Returning a bool based on line value calculations

[troyer2]

I am trying to calculate a trend based on this logic but keep getting an error, I want to reference the latest value from these plots

self.upTrend = 1 if self.smi_h.SMI > self.smi_h.AvgSMI and self.smi_m.SMI > self.smi_m.AvgSMI and self.smi_l.SMI > self.smi_l.AvgSMI else 0

TypeError: __bool__ should return bool, returned LineOwnOperation

SMI Class code

class StochasticMomentumIndex(bt.Indicator):
  alias = ('SMI',)
  lines = ('SMI', 'AvgSMI',)
  params = (
      ('k_period',5),
      ('d_period', 3),
      ('over_bought', 40),
      ('over_sold', -40),
       )
  def _plotlabel(self):
    plabels = [self.p.over_bought, self.p.over_sold, self.p.d_period, self.p.k_period]
    return plabels

  def _plotinit(self):
    self.plotinfo.plotyhlines = [self.p.over_bought, self.p.over_sold]

  def __init__(self):
    min_low = bt.ind.Lowest(self.data.low, period=self.p.k_period)
    max_high = bt.ind.Highest(self.data.high, period=self.p.k_period)
    rel_diff = self.data.close - ((max_high + min_low)/2)
    diff = max_high - min_low

    avgrel = bt.ind.EMA(bt.ind.EMA(rel_diff, period=self.p.d_period), period=self.p.d_period)
    avgdiff = bt.ind.EMA(bt.ind.EMA(diff, period=self.p.d_period), period=self.p.d_period)

    self.lines.SMI = avgrel / (avgdiff / 2) * 100 if avgdiff is not 0 else 0
    self.lines.AvgSMI = bt.ind.EMA(self.lines.SMI, period=self.p.d_period)