persistable sclass MaxLossJuicer extends AbstractJuicer {
  new L<SignalWithStrength> signals;
    
  L<SignalWithStrength> calculateCloseSignals() {
    var signals = super.calculateCloseSignals();
    
    double profit = juicable.juiceValue();
  
    // How close are we to our loss limit?
    if (profit < 0)
      signals.add(new CloseSignal().createdBy(this), "Loss", doubleRatio(juiceValue, -maxLoss));
    
    ret signals;
  }
}