To me this graph doesn’t make sense. It’s showing a net combination of speeding on my credit card and PayPal against PayPal income.
In some cases, such as the above current accounts example (credit cards, checking accounts, etc.), a line graph is shown where i think there should be a bar graph. A line graph should represent cumulative data, such as savings and investments, but a current account that’s tracked within a time frame (i.e. a credit card) should be shown in bar graphs.