Plotly.js newshape texttemplate

[isetthestandard]

Hello,
I have a problem namely
I would like to add a texttemplate to a newsshape. the texttemplate should be an equation similar to (y1-y0)/y0*100
is it possible like this:
newshape: { label: { texttemplate: "Change: %{dy:.2f}/%{y0:.2f}*100"}},

Best regards

[archmoj]

cc: @emilykl