Mismatched current and historic units
Current and historic data units on the interactive chart are different on some JSE stocks, e.g. 4SI.JO. https://yhoo.it/2MJvd7d. Current price is 100x larger than historic values, making history useless.
This only happens on the interactive chart, not the overview https://finance.yahoo.com/quote/JSE.JO?p=JSE.JO.
Robert Fraser shared this idea