Well i guess you are right it is a lot of data to be handled just by the node-red itself (storing it in either file or context)and querying it by timestamps.
The data i have is power price from a power company (mW/ EUR) and it haves hourly values from 2019 to current date ( and still updating)
The only good way would i guess be for grafana to pull directly from the company page. (But it is in need of development a custom plugin).
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