Proxy funds market data

[gccollect]

I have created a local branch for this feature. It adds an optional "factor" to ScraperConfiguration which is used to multiply the result from the selector. It defaults to 1. What's the process for creating a related PR?

Discussed in #3414

^{Originally posted by gccollect May 15, 2024}
Many funds, particularly within pensions, are actually proxies for an underlying fund but with a different unit price. Yahoo typically only has the underlying fund market data. To handle this, it would be great to be able to define a market data as a specific ticker multiplied by a constant.

[dtslvr]

Hi @gccollect

What do you think about a pipeline which can have multiple post processing actions instead of a factor attribute? This approach could be more flexible for advanced use cases in the future.

[gccollect]

Thanks for the suggestion. I could change it to postprocessor and make it a string. If it can be converted to a number, then it is used as a factor. This way, the same attribute could later be used for more advanced post-processing in a backward compatible way while delivering this easy feature right now. I know what I would do in C++, C# or Python, but my knowledge of TypeScript is 0, so I don't know if there is a better approach.

[gccollect]

Hi @dtslvr, the change above is ready. Let me know if you want to merge it.

[dtslvr]

Hi @dtslvr, the change above is ready.

Could you create a PR with the changes you have already implemented. I can then give you feedback.

[gccollect]

Hi @dtslvr, the change above is ready.

Could you create a PR with the changes you have already implemented. I can then give you feedback.

#3426