The pullbacks in some of the top cruise stocks are all buying opportunities.Look at Royal Caribbean (NYSE:RCL), for example.Even with strong booking demand and earnings growth, the stock dropped from about $173 to a recent low of about$152, where it’s now oversold and pivoting higher. Not only did it just catch support at its 50-day moving average, but it’s also excessively oversold on RSI and Williams’ %R. While expecting RCL to resume its uptrend, I’d buy the temporary weakness.From its last traded price ...