Far from causing confusion, the difference in colour has seen Walkers chart an inexorable march to the top of the UK crisp market.

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My what a difference 18 months makes ( see chart.) For anyone who thinks the stock market is efficient the value of Netflix should make one wonder.

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The biggest difference in purchase factors, as the chart shows, is the identity of the manufacturer, which I take to mean brand.

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Like every other comparison chart out there explaining the difference between various versions of a product, most consumers will automatically assume that the grayed out areas are not available in that particular version.

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In the bottom chart below, the red line shows the difference between the two moving averages, while the dotted red line is the 9-period moving average.

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