[ES] Has the S&P 500 Finished Its Runup?I doubt it. That move doesn't look like it's done.
The general principle that this basic analysis follows is that the market moves in 3s and 5s. Now, that may sound a lot like Elliot Waves and it should. 3s and 5s were Ralph N. Elliot's primary discovery and contribution to the discovery of natural phenomena in markets.
That said, it is dangerous to get dogmatic about rules. The same applies to Fibonacci extensions. But when you combine "3s and 5s" and "Fibonacci" you end up with a pretty reliable pattern. When there is a three wave move in progress (which could eventually turn into a five), you can pretty reliably trade that move (up in this case) to the 0.786 trend extension (highest probability), the 1.000 extension (high probability), or it could turn into a five wave move that goes clear up to the 1.618 extension (lowest probability move).
It is not wise to be dogmatic about these strategies though, because you have to listen to the market. The market is the CEO of this enterprise, not the lines on your chart. That said, this works better than 50% of the time without question. It's a generally truthism that markets move in 3s and 5s. The challenge comes when it comes to 'wen buy, wen sell.' There is no right answer to that. Sure, the market moves in 3s and 5s, but to take advantage of it requires fluidity and a careful consideration of your (a) risks, (b) 'Bayesian priors" (if you will), and (c) the adjacent future outcomes as the come into view.
This is not an endorsement of either methodology. It is merely a demonstration of the veracity of components of those methodologies.
Trade well.