Silver traded lower Thursday. Recent weakness resulted in a break of a trendline drawn from the Oct 5 low. This highlights a bearish threat and exposes key support at $22.510, the Dec 13 low. This level was pierced yesterday, a clear break of it would signal scope for a continuation lower and open $21.883, the Nov 13 low. Key short-term resistance is at $24.606, the Dec 22 high. A move above this level would reinstate a bullish theme.