Bar chart inherits all features of column chart. Here are a couple examples:
I also added a new feature in this release - you can set the time interval at which data should be reloaded:
<reload_data_interval>5</reload_data_interval>
would mean that data will be reloaded every 5 seconds.
<add_time_stamp>true</add_time_stamp>
this would mean that then loading data flash will add additional time stamp to url and data will be renewed every time.