cool! i gather you’re using regression for the trend line - it’s the dotted line right? it looks good! your question about time series equal interval graph becomes a challenge when the known observations are not equally spaced to start with! subject is over my head!
i like visualization too. sometime ago, i did a quick render of a sankey diagram using the technique shown by @ACTech in his demo app. (google charts via webview).
https://x.thunkable.com/copy/51dca818128615a271172625f19acd2f
the data that goes into this is
[‘A’,‘X’,5],[‘A’,‘Y’,7],[‘A’,‘Z’,6],[‘B’,‘X’,2],[‘B’,‘Y’,9],[‘B’,‘Z’,4]
