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When I go to the Yahoo Finance Summary page and look at the chart and hover my curser over the volume, a red or green tag will appear on the right side. If the tag is red, it indicates that the price has dropped. If tag is green, price has increased. Look at the stock GSI.V or GKPRF. When you hover over the 1 day volume and the price has increased, the volume tag is red. Why is the tag red when the price increased?

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  • IT's not a straight volume up or volume down indicator. My guess is that it might be some kind of price/volume calculation. Apr 14 at 20:03
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You are correct that if the Volume bar is red the price has decreased and if it's green the price has increased. But you need to pay attention to the time interval across which Yahoo is making that distinction.

The price may have risen or fallen over the entire day but those Volume bars on the summary page are representative of half hour intraday slices. So the volume bar is red because for whatever half hour slice you are hovering over, the price at the beginning of that half hour period was lower than the end. The price on the day may have ended up, but it fell for that period.

It's much easier to see this if you open up a full screen chart and change the chart type to Candle or Colored Bar. The volume bars will line up to the Candle/Colored Bar periods and you can clearly see where a stock price ended in a period versus when it began that period and the volume bar should be colored appropriately.

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