Rob will start with the Broader Averages, and how they are working in relation to each other. Then he will go through the Sectors.
LABU = BioTech
XLE = Energies
XLK = Tech
XLU = Utilities
XLV = Healthcare
XRT = Retail
FAS = Financials
IYT =Transports
You can research these and create watchlists of the holdings. After some time you will start to remember what stock is in what Sector. You always want to know what Sector your stock is in. If something you have is trending, you can look at other stocks in that sector to find stocks that are doing the same thing.