MINYANVILLE ORIGINAL Today we highlight the strongest and weakest names within the S&P 500 (INDEXSP:.INX) based on our proprietary algorithm.  In our view strength is not measured by year-to-date performance but through technical analysis using internal market data to determine price trends/countertrends pattern recognition and other variables including volatility and liquidity. By our calculations the strongest names include: Yahoo (NASDAQ:YHOO) Roper Industries (NYSE:ROP) Salesforce.com (NYSE:CRM) Motorola Solutions (NYSE:MSI) and Computer Sciences Corporation (NYSE:CSC). Weakest names include: Hewlett-Packard (NYSE:HPQ) Windstream Corporation (NASDAQ:WIN) NVIDIA Corporation (NASDAQ:NVDA) Microsoft (NASDAQ:MSFT) and Advanced Micro Devices (NYSE:AMD). In the tech sector hardware and hardware-related services ...