This indicator tends to lead RSI. I set my %K to 14-day to match RSI. Chart is zoomed in a bit so you can see the yellow rectangles on 1/31 show that %K dropped from over 80 to under 20 in 3 time periods (candles). When this %K move happens in 2-3 candles (up or down), there is usually a quick move back in trend direction, and then price starts turning at some point. Sometimes it is not a true trend change but rather a pullback to support. This signal occurred on Friday, and you can see after that the stochastic shot back up; and price has also increased more. Today I have been checking 5-15-30 min charts for more support to buy puts.
This trade is high risk. Today's buying is reaction to analyst notes. If media mentions impact of Shanghai factory being closed, this may cause selling. For the same distance from stock price (up 150, down 150), calls cost twice as much as puts. I am opening a small position of 2/14 expiry 600 strike puts, based on 30m chart. I am not holding a rigid exit plan, instead will check stock near today's close to confirm my trade idea. Targets are 690, 655-650, 630-625 and below 600.