The one feature these screens do not yet offer is colour and, though colour versions will surely come to market, no one is yet sure which version will succeed.

这些屏幕的一个特征就是没有色彩，虽然彩色的版本将会面市，但是没有人能确信彩色的能成功。

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We also have on-balance volume (OBV) data available for this period even though Joe Granville had not yet come up with the concept.

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