Creating a new Index

Hello

I would like to develop a stock index from a portfolio of approx. 32 stocks and display it in a graph. I have stored the shares in a watchlist.

Does anyone have experience of whether this is easy to program and possible via an exploration? I would like to do this with daily data and thus obtain an index value for each day.

Thank you very much for your feedback and ideas on how I can realize this.
Regards Martin

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Thanks - Vielen Dank