volume color
Bring back the previous colors of volume. Saturation of the new ones is very low, volume is less visible, a little blurry.
I also prefer the previous look of non-colored bar chart. I don't think there's many people who use bar chart and even care, but I do. Those are no longer classic charts if you keep messing around with them. I think I can speak for majority of people who use classic Yahoo charts when I say that what we want is not "progress" (unnecessary changes) but consistency.
I never used candles, but it seems to me that you changed the look of them as well making them look less sharp (they look blurry).

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D commented
Thank you for fixing it and bringing back the old charts.