Different way into Historical Charts

The Historical Charts are extremely helpful for seeing trends of a particular SQL statement.  I wish I could go to a Historical Charts page (maybe just an option in Reports) where I could specify a SQL statement I want to see the Historical Chart for.  Currently you have to get the SQL to appear on the Trend screens by drilling down to the right spot before you can select it from the View Historical Chart dropdown... sometimes the SQL you are interested in is hard to find this way.