The series are constructed by the result of a sql. The X-axis has a period of time. The problem is that I have a number to one for Mastercard and Visa. series corresponding to the Visa, the first value in this query is regarding Jul/2011, but the X-axis starts at Jun/2011. What happens is that the plot of this chart, getting in Jun/2011 and not jul/2011. How do I assign the series to the query result?