Currently, in all widgets and on the data studio, we can only select one time period. To carry out an in-depth analysis of the power curves of a turbine, it would be very interesting to be able to select several periods (one for each PC displayed simultaneously) to detect underperformance more effectively. In addition, it would allow to identify the date of occurrence of an underperformance, as well as to compare wind resources of the two periods on the distribution of the scatter plot.