On Y axis minimum step range is 0.2, it's not enough for item values with 2 and 3 digits after decimal point.

(1) two digits after decimal point
Steps to reproduce: Send different values on trapper from 2.68 till 2.78 (two digits after point)

Result: graph line is between 2.6 and 2.8, without tooltip isn't clear which exactly value is on graph. On the classic graph Y axis step is 0.02 and the item values are clearly visible

Expected: Y axis step range is 0.0.2

(2) three  digits after point
Steps to reproduce: Send different values on trapper from 2.780 till 2.790 (three digits after point)

Result: in tooltip are two digits after point and on graph almost straight line

Expected: in tooltip three digits after point and more clearer line on the graph

(3) Can't set float number for min and max values of Y axis
Steps to reproduce:

1. Go to widget configuration tab Axes
2. Set min 5.6 and max 7.4

Result: on graph Y axis min 5 and max 8
Expected: min 5.6 and max 7.4