Can't use the sum operator with bubble charts

Need help
1

Hey there, I was following Gregory John’s very helpful video on using charts in Bubble, and it all made sense in terms of aggregation to make a cumulative chart and add up all the values on a line graph.

Unfortunately I can’t seem to use the ‘sum’ operator on the value expression.

See John’s screenshot here:

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image722×842 48.2 KB

Here’s mine:

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image1338×1098 119 KB

I’ve followed all the steps but can’t seem to grab the ‘sum’ operator that he used.

Thanks for any help in advance

2

Normally you should reference the data source grouping in value expression and not do a new Do a search for. Same for Label expression (First screenshot, you use Current point’s date… it will be the amount:sum)

3

I believe this is needed for cumulative line graph?

Cheers,