Hi, I would like to create a report on incoming and resolved ticket trend. I do manage to generate the chart but the data displayed is incorrect. I have attached the chart below:

As you can see, the value for both incoming and resolved ticket are the same for every month except Feb 2020. This is due to null data present in the table. Set that aside, supposedly the data for both incoming and resolved ticket are not the same. For example, the value for incoming ticket for Feb 2019 is 39 and the value of resolved ticket for that month is 34. However, according to this chart the value for resolved ticket is the same as the value for incoming ticket. So, how can I have the correct value for the resolved tickets?

Below I have attached a similar type of chart that I want to produce (I found it in this community but it doesn't mention on how to produce it):