regarding Elliot Wave, what I've highlighted is a very simplistic by powerful an useful way to use it. With Elliot Wave it's easy to go down the rabbit hole and try to label all these crazy counts and micro counts etc and that gets overly complex and actually hinders trading. 

my method is to keep it very simple:  

1. In up trending environments look for 3-wave abc pullbacks as buying opportunities-  same for shorts on downtrends, short abc bounces.  coils can form instead and if they do they are 5 waves but overlapping) but most of the time you see abcs

2. most folks know what the traditional 5 wave impulse looks like.  Wave 4's can't overlap top of wave 1 in an uptrend or bottom of wave 1 in a downtrend, It's pretty obvious just looking at a chart when you are in an impulse.

coils have 5 waves.   and 5 waves up or down that are overlapping are corrective not impulsive 

also - true 5 waves always have MACD divergence, if no divergence most likely it's a wave 3 instead 

so when looking at a stock that has had a correction,  if all you see is a bunch of up and down waves overlapping each other, even if price has been stair stepping lower, that's clearly NOT an impulsive trending move down, it's ultimately corrective and bullish, not starting a major downtrend - so you know that it will eventually resolve up

simply viewing EW like this in a very simplistic way is good enough for most people to use it very effectively vs having to study all the dozens of wave counts and rules that can take months and years to really get good at - with this simplistic approach you can use it right away with your trading