in 3.5.6 chart only show 3 decimal number,
But in the 3.6.1
Decimal number is too many like a bug ?
in 3.6.1 Chart decimal number question
Funny enough I had to deal with this same thing yesterday. It is not the chart, it is the <ma-get-point-values>.
Add the option:
<ma-get-point-values rendered="true" >Your values will come with the decimals set under their text renderer properties.