Firstly, thank you for the wonderful contribution to the whole BTC community. I'd like to make a suggestion!
Check this chart from trading view - http://imgur.com/ZTThtwo
The bars on the right side are called Volume by Price. I find them tremendously useful. Specially if you can specify how the info is presented like in here - http://www.sierrachart.com/index.php?l=doc/doc_VolumeByPrice.html
Is there any chance you might add this feature to bitcoinwisdom soon? Keep up the good work!