Requirements

1. WWW::Mechanize
2. GD::Graph
3. Date::Simple
4. HTML::TableExtract

How to use

$ perl curency.pm <id> <start_date> <end_date>

• <id> - cite identifier
  1. cb - http://www.cbr.ru/currency_base/dynamics.aspx
  2. fin - http://www.finmarket.ru/currency/rates
  3. val - http://val.ru/valhistory.asp
• Date format - YYYY-mm-dd
  1. <first_date> - start date interval
  2. <last_date> - end date interval