Thanks for the response happy to provide more detail.
So basically I am bringing in time series price data via an API (not storing it in a database) and populating it in a financial candlestick chart plugin ([New plugin] Advanced Financial Charts and Graphs) (so it’s not being displayed in a repeating group).
Basically I want to generate a new list where each price is the average of the previous 147 close prices. Then I’ll be able to add the new list data to the chart in the form of a line series.