This morning, the leading gold miners are trading higher to start the day. The popular and highly followed Market Vectors Gold Miners ETF (NYSE:GDX) is trading higher by 0.35 cents to $42.63 a share. Short term traders should watch for intra-day resistance around the $42.90, and $43.26 levels. The daily chart of the GDX will have very good support around the $39.50 area should the leading ETF decline from current levels.   ...