daily performance chart shows wrong percentage change: measure the change from opening trade instead of closing
I think there is a flaw in your charts. I put together a rather ordinary chart of three indices (DJIA, S&P500 and Nasdaq Composite). When I do a daily performance chart of the three the percentage changes are wrong since they measure the change from the opening trade to the closing trade instead of using the previous day's close as the starting point. I would imagine that this flaw is imbedded in your other charts, especially YTD performances. I don't remember seeing this flaw in your old charts.
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Gora Nelg commented
I can confirm. The chart seems right when it shows only one ticker, but as soon as I use the comparison tool to add another ticker the percent measure turns wrong.