Shares of CSG Systems (CSGS) have gained 1.6% over the past four weeks to close the last trading session at $47.61, but there could still be a solid upside left in the stock if short-term price targets of Wall Street analysts are any indication. Going by the price targets, the mean estimate of$62.50 indicates a potential upside of 31.3%.The average comprises eight short-term price targets ranging from a low of $43 to a high of$81, with a standard deviation of $13.68. While the lowest estimate indicates a ...