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This is not an issue but I not find a better place to post .I try with your code which is works fine with positive values but negative values the bar not appears like I try with bellow data

var chartData = [ {name: 'Foo', value: [{"a":-100}, {"b":150}, {"c":200}]},
{name: 'Bar', value: [{"a":200}, {"b":-250}, {"c":300}]},
{name: 'Baz', value: [{"a":300}, {"b":350}, {"c":-400}]} ];
how to fix this ? a sample is appreciated .I try with http://stackoverflow.com/a/16582072/4336330 but not working .

What are the properties to display legend in the current chart ?
Please guide me,
Thanks & Regards,
Abdul Samim