Stock market opinions abound — here’s an objective way to tell when the market bottoms By: MarketWatch March 17, 2020 at 13:22 PM EDT The relative strength index is a key indicator for investors, says Nigam Arora. Read More >> Related Stocks: Adv Micro Devices Amazon.com American Airlines Gp Apple Bank of America Dow Industrials SPDR Intel Corp JPMorgan Chase & Co Southwest Airlines