Shares of Red Robin (RRGB) have gained 8.6% over the past four weeks to close the last trading session at $6.17, 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$10 indicates a potential upside of 62.1%.The average comprises four short-term price targets ranging from a low of $6.00 to a high of$12.00, with a standard deviation of $2.71. While the lowest estimate indicates a dec ...