Forum Discussion

JanD's avatar
JanD
Frequent Visitor
4 years ago

Extract data from a chart on website

Hello everyone, 


I woudl like to ask for an advise how to extract data from a specific object (Chart) on a website. 

My intension is to get daily values of mutual funds into Power BI, howover so far I couldn't find any way how to do it. 

Is it even possible?

 

https://finance.yahoo.com/quote/WPLCX?p=WPLCX

 

Thanks a lot!

Jan

 

6 Replies

  • The Historical Data tab should be friendlier to work with:

     

    It has a download option that exports CSV but you could also connect to the web page via Power Query with a query like this:

    let
        Source = Web.BrowserContents("https://finance.yahoo.com/quote/WPLCX/history?p=WPLCX"),
        #"Extracted Table From Html" = Html.Table(Source, {{"Column1", ".Pend\(10px\)"}, {"Column2", ".Pend\(10px\) + *"}, {"Column3", ".Pstart\(10px\):nth-child(3)"}, {"Column4", ".Pstart\(10px\):nth-child(4)"}, {"Column5", ".Pstart\(10px\):nth-child(5)"}, {"Column6", ".Pstart\(10px\):nth-child(6)"}}, [RowSelector=".Pend\(10px\)"]),
        #"Changed Type" = Table.TransformColumnTypes(#"Extracted Table From Html",{{"Column1", type date}, {"Column2", type text}, {"Column3", type text}, {"Column4", type text}, {"Column5", type text}, {"Column6", type text}}),
        #"Renamed Columns" = Table.RenameColumns(#"Changed Type",{{"Column1", "Date"}, {"Column2", "Open"}, {"Column3", "High"}, {"Column4", "Low"}, {"Column5", "Close"}, {"Column6", "Adj Close"}})
    in
        #"Renamed Columns"
  • JanD's avatar
    JanD
    Frequent Visitor

    Thank you AlexisOlson

    But this is just example. I have many different websites, which I need to extract data from. 

    Usually there is only chart without any download option or historical data table..

    That's why I am looking for an option how to extract data from the chart.

     

    Here is another case

    Conseq - UNIQA CEE Akciový fond (CZK)

    • AlexisOlson's avatar
      AlexisOlson
      Super User

      That one has a link to historical prices too (scroll down to documents). ðŸ˜‰

       

      I don't think I can provide a general solution since different charts are generated differently.

       

  • Anonymous's avatar
    Anonymous
    Not applicable

    Hi JanD ,

     

    Agree with AlexisOlson .such a difficult requirement could not be realized currently.

     

    If you also want this in power bi, let the power bi community to know this things and give your votes at power bi site's feedback - Ideas

     

     

    Best Regards,
    Eyelyn Qin

  • Hi JanD 

    Did you figured how to solve this? I'm trying to build somoething similar as well i can´t find a solution

  • I had this problem too and found a few online tools out there that do this well. I thought DataFromChart was the simplest to use as it also had some free AI credits I could use and was also more geared towards finance. I initially tried WebPlotDigitizer but it was too clunky (imo)