I want to use a trend zone to show the expected range of some financial values - and this range may be outwith all of the values within the chart itself. However, if the maximum value of the trend zone is higher than the current maximum value of the y axis or lower than the minimum value of the y axis - the trend zone just does not get rendered. See the JSFiddle below. Is there any way to resolve this:
http://jsfiddle.net/deenairn/YcuQ7/27/