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Price chart (with averages and Bollinger bands) is displayed wrong when using logarithmic scale. How could I stop this?

April 26, 2017averages bands bollinger chart logarithmic price scale wrong

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Price chart (with averages and Bollinger bands) is displayed wrong when using logarithmic scale. How could I stop this?

1 Answer

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The reason is that your data set contains quotations with one of the price field (Open, Low, High, Close) equal to zero. Because log( 0 ) is undefined you get strange results. Please avoid entering quotations with zeros in one of the O,L,H,C fields.