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Understanding the symbols next to the Ticker
BATS here means your data feed is coming from BATS only. You're not seeing up to date prices from NASDAQ, NYSE or any other of the ECNs. For a liquid equity like AAPL, BATS prices are typically up to date but for a less liquid listing, you wouldn't always see the NBBO. To get live feeds from every ECN, you have to pay. BATS is offering this information freely and that's why you're seeing it now. AAPL is listed on NASDAQ but you can trade pretty much everything on BATS, just like on other ECNs and exchanges.