A new uptrend may be forming. This is why Costco is our Stock of the Day. Trading in Costco Wholesale Corporation COST is quiet on Monday. But this may soon change. A popular trading model has just generated a 'buy' signal. There are many effective and potentially profitable trading methods. These include trading breakouts or reversals. Another method is referred to as 'trend following'. Many trend-following strategies utilize analysis of specific prices to determine entry and exit points. If the recent nea ...