sclass TradingRun extends TradingCandle is IntSize {
  new L<TradingCandle> candles;
  
  void add aka addCandle(TradingCandle candle) {
    candles.add(candle);
    addValue(candle.end, candle.endTime);
  }
  
  int size() { ret l(candles); }
  
  double changePercent() {
    ret asPercentIncrease(changeRatio());
  }
  
  S myType() {
    ret "run length " + n2(candles) + ", change " + formatDouble2X(changePercent()) + "%";
  }
}