This appears to be an objective level for active traders that shorted AAPL (Apple Inc.) on the recent breakdown and/or backtest of the primary uptrend line to book profits & cover the short while reversing to a long position here or down to but now below 170 for a counter-trend bounce trade before reversing back to short for the next leg down. 60-minute chart with bounce targets (in purple) below.
AAPL 60m Aug 18th