code: public FutureOperation subscribeCandles(final BitfinexCandlestickSymbol symbol) throws BitfinexClientException {
  		
  		final FutureOperation future = new FutureOperation(symbol);
  		pendingSubscribes.registerFuture(future);
  		
  		final SubscribeCandlesCommand command = new SubscribeCandlesCommand(symbol);
  		client.sendCommand(command);
  		
  		return future;
  	}
docs: Subscribe candles for a symbol
  @param currencyPair
  @param timeframe
  @return
  @throws BitfinexClientException