Trading in the major U.S. index futures suggests that Wall Street stocks may open Tuesday’s session lower after advancing in the previous two sessions. After Asian stocks, with the exception of Japan and China ended on an upbeat note, the European markets are seeing mixed sentiment. Commodity prices are lower, as the dollar remains firm ahead of Friday’s non-farm payrolls data. The mood in the domestic markets may also hinge on economic data on consumer confidence and regional business activity, while the developments on the Greek debt crisis may also impact trading.