Getting 2 different lines/datapoints via chart.js

i am working through chart.js which i got here:
And it works very well if I want to show 1 graph until I want to add 2 different data points to display 2 different lines/graphs.
Can someone help me?
thanks in advance

Does the standard dashboard chart not do what you want? I wrote the flow you linked to 6 years ago, I think the standard chart will now do everything that flow does.

In want to put an array of X and Y coordinates in the chart and i think the current chart node is time based and you cant do x and y coordinates

The dashboard chart will do non-time series data. There is an example in node-red-dashboard/ at master · node-red/node-red-dashboard · GitHub