Shares of CSG Systems (CSGS) have gained 7.7% over the past four weeks to close the last trading session at $46.42, 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$63.63 indicates a potential upside of 37.1%.The mean estimate comprises eight short-term price targets with a standard deviation of $13.05. While the lowest estimate of$43 indicates a 7.4% decline from the current p ...