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.