Gbp/usd - 1.6608 ... Cable was unable to penetrate y'day's high at 1.6638 in Asia n retreated with some traders seen on the sidelines ahead of the release of U.K. September retail sales data at 08:30GMT (forecast to increase by 0.5% m/m). Offers remain at 1.6660 n 1.6690/00 (for profit taking purposes) while on the downside, bids are located fm 1.6580 down to 1.6550. European equity markets are likely to open slightly lower following y'day's 92-point delcine in the Dow...