class_docstr: A BarFeed that builds bars from a Historic Trade Data CSV file as described in http://www.bitcoincharts.com/about/markets-api/.
  Files can be downloaded from http://api.bitcoincharts.com/v1/csv/.
  
  :param timezone: An optional default timezone to use to localize bars. By default bars are loaded in UTC.
  :type timezone: A pytz timezone.
  :param maxLen: The maximum number of values that the :class:`pyalgotrade.dataseries.bards.BarDataSeries` will hold.
      If not None, it must be greater than 0.
      Once a bounded length is full, when new items are added, a corresponding number of items are discarded from the
      opposite end. If None then dataseries.DEFAULT_MAX_LEN is used.
  :type maxLen: int.
  
  .. note::
      * A :class:`pyalgotrade.bar.Bar` instance will be created for every trade, so open, high, low and close values will all be the same.
      * Files must be sorted with the **unixtime** column in ascending order.
code: def barsHaveAdjClose(self):
      return False
  
imports: from pyalgotrade import barfeed
  from pyalgotrade import bar
  from pyalgotrade.barfeed import csvfeed
  from pyalgotrade.utils import dt
  import datetime
label_desc: Use image node_id 2 for calling the CSVTradeFeed obj's underlying member method code with example usage: obj.barsHaveAdjClose() and returns: False