S&P, NASDAQ, DOW Wall Street will find itself under a microscope on Tuesday morning. The three major indexes have all performed strongly in recent trading and investors who have been sitting on the sidelines may be starting to get pressure from their bosses and clients to participate. Volumes have remained rather thin on Wall Street for months, but recent advances may start to fuel more risk taking. The States will be quiet with data today, but tomorrow housing sector data is on the calendar