Welcome to the forum.
This is a common question asked here. If you search the forum for
CSV chart
you will find several threads.
If you need to post a flow again then see this post for how to do that How to share code or flow json
If you are a beginner with nodered I recommend watching this playlist: Node-RED Essentials. The videos are done by the developers of node-red. They're nice & short and to the point. You will understand a whole lot more in about 1 hour. A small investment for a lot of gain.
