chart dataValues- No of ItemsoldGroup-Product(ProductA,ProductB,ProductC...)Series -Year(2013,2014,2015,2016)I have to show the trend of the item sold for each group by a up and down arrow.Let say item sold for ProductA in year 2013 is 15,2014 is 18,2015 is 20 and 2016 is 23.So I have to display a up arrow for this case.Similarly I have to do the same for all the products.
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