vectrosity: Draw lines with value of float

Hi, I am using vectrosity to draw lines, however, I am plotting for EMG values with float values. But when I draw lines, the y-axis seem to be only in integer, but I wanted it to be float instead.

This is because for e.g. my EMG value at second 1 is 5.1 but at second 2 it becomes 5.4 so I want it to show the increase in the lines. But when i plot, the line will not change since the integer of 5.1 and 5.4 is still 5, so it will show as a straight line.

Please advise!

Thank you!