The IWM ETF which tracks the Russel 2000 index put in an outside reversal, or bearish engulfing, candle today which eclipsed the 6 prior daily candles. When the body of a price candle completely engulfs the prior candle it is called a bearish engulfing candle. Since todays candle also engulfed the 5 candles prior to yesterdays it is called a bearish engulfing plus 5 candle(BE+5), for a total of 6 candles that were eclipsed by todays candle. The more candles that are engulfed by an outside reversal candle the more bearish the move and outlook.
Raising your stop-losses and/or taking some short bets against the market isn't a bad move here on an outside reversal day like today was, especially if markets close down going into the weekend. If markets close red on a Friday, they tend to close red the following Monday as well.