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concept CleanMoveStrategy extends G22TradingStrategy {
  persistable class Position extends G22TradingStrategy.Position {
    settable CallbackJuicer juicer;
  }
  
  srecord ProfitBeforeLeverageJuiceable(Position p) is Juiceable {
    public double juiceValue() { ret p.profitBeforeLeverage(); }
  }
  
  void price(double price) {
    if (currentPrice == price) ret;
    currentPrice = price;
    afterwards { change(); }
    
    for (p : openPositions()) {
      if (p.juicer != null) {
        var signals = p.juicer.calculateCloseSignals();
        var strongest = highestBy(signals, s -> s.strength());
        if (strongest != null && strongest.isTrigger())
          p.close(strongest);
      }
    }
  }
  
  L<? extends Position> openPositions() { ret (L) super.openPositions(); }
}