sclass G22CandleBasedStrategy extends G22TradingStrategy {
  settableWithVar double granularity = 1; // candle granularity in minutes
  settableWithVar TradingCandleMaker candleMaker;
  
  // max number of candles to keep around (only used when first
  // creating candle maker)
  settableWithVar int maxCandles = 1000;
  
  // first (usually partial) candle that will be ignored
  //settableWithVar TradingCandle firstCandle;
  
  // Last completed candle
  settableWithVar TradingCandle completedCandle;
  
  // A candle has been completed
  event candleCompleted(TradingCandle candle);
  event newPrice(double price);
  
  // override me
  L<CandleBasedIndicator> indicators() { ret new L; }
  
  // For testing - feed candles directly
  void feed(Iterable<TradingCandle> candles) {
    fOr (candle : candles) try {
      currentTime(candle.endTime.toLong());
      gotCandle(candle);
    } finally {
      afterStep();
    }
  }
  
  void gotCandle(TradingCandle candle) {
    completedCandle(candle);
    fOr (indicator : indicators())
      indicator?.feed(candle);
    candleCompleted(candle);
  }
  
  // Normal operation from ticker
  void price(double price) {
    currentPrice = price;
    if (hasClosedItself()) ret;
    
    newPrice(price);
    
    //printVars("G22CandleBasedStrategy.price", +price);
    try {
      createCandleMaker();
        
      var completed = candleMaker.completedCandle();
      candleMaker.add(price, currentTime());
      /*var candle = candleMaker.currentCandle();
      /if (firstCandle == null)
        firstCandle(candle);
      else if (candle != firstCandle && ... */
      if (completed != completedCandle())
        gotCandle(completed);
    } finally {
      afterStep();
    }
  }
  
  S fieldsToReset() {
    ret lineCombine(super.fieldsToReset(), [[candleMaker firstCandle completedCandle]]);
  }
  
  L<TradingCandle> candles() { ret candleMaker().candles(); }
  
  // How many candles we need to see before the strategy can start making positions (override me)
  int candlesNeededBeforeOperational() { ret 0; }
  
  void createCandleMaker {
    if (candleMaker == null)
      candleMaker(new TradingCandleMaker().candleLength(granularity)).maxCandles(maxCandles);
  }
}