HCA broke higher out of a parallel trend channel in early 2018, rallying from $100 to $140 before entering a correction. The price action from the October 2018 high appears to be a flat correction, which is a common Elliott Wave pattern following strong impulsive moves.
In this type of correction, Wave A is a three wave counter-trend move followed by a three wave rally in Wave B. It is referred to as an "expanded flat" when Wave B makes a new high, as it has done in this case. The final leg of the correction is a five wave move lower in Wave C, which is often confused for the start of a new impulsive sell-off.
From the Wave C low, we can clearly see a five wave rally higher into the previous high. We're considering this a resumption of the long-term trend, which presents an opportunity to get long on a pullback into Fibonacci support between $130 and $135. Initiating a long position at market and looking for price to make new highs in coming weeks.