In my understanding, you are using wavelet analyzer app and tried 1D-Wavelet analysis. X axis represents the number of samples (values) which also appears on top of the screenshot. It has 1719837 samples and X axis represents the same in 10^5 figures.
As I can see from the original signal plot, there are many samples with zero value (DC component). This is the reason; Histogram shows maximum count of zero. Cumulative histogram keeps adding the value.
Statistics blocks below shows the mean which is very less due to presence of maximum zeros. Also, it shows the maximum, minimum and range of the all 1719837 samples.