Thanks for the additional info.
From the error message it is obvious that the techan library was not loaded. It is likely that this is due to XSS protection. I will include a copy of the library in the next patch release of the extension. Thank you very much for reporting this.
If you wish to see what the candlesticks look like, you can have a look at the techan library: http://techanjs.org/
Technical indicators are not implemented, but there are candlesticks, volume bars, and arrows at the user’s buy and sell positions.