* Euro support on hourly charts in $1.3725 to $1.3730 area * Potential for short-covering may lend euro support * 200-day MA may block euro gains in coming months-analyst By Masayuki Kitano SINGAPORE, Oct 20 (Reuters) - The euro inched lower on Thursday, hurt by nagging doubts over whether European leaders will take aggressive steps at a summit this weekend to ease the region's debt crisis. The euro dipped 0.1 percent to $1.3747 , having retreated from the previous day's intraday high of $1.3870, as European policymakers struggled to reach consensus on measures to contain the crisis. French President Nicolas Sarkozy ... (full story)