For example, stock exchange opens at 9AM, suspend for lunch at 11h30AM, resume at 1h30PM, and closes at 3PM everyday except weekend. Using ordinal, my expectation is that HighStock can only draw xAxis labels as 9 - 10 - 11 - 13 - 14 - 15 for each date except weekends.

I try to fix xAxis labels here http://jsfiddle.net/yDkrJ/2/ but it doesn't work.