Here's one I've not mentioned in the earlier sessions.
Again, I trade by calculation, but the chart patterns can give you indications of the probabilities ahead of time.
Look at the direction of convexity of the wave formations at different levels. The current retrace of the S&P500 since Tuesday evening (GMT) starts with a couple of 'humped' waves (excuse the language but at the moment I can't think of a better term), and then seems to switch into a droopy sequence, albeit still uptrending at larger wave level.
As I write, it's also just jumped quite a distance in a short space of time. This is classic wave formation which maps out clear patterns with most indicators, and of the type which Hurst coincided with in his 1970s study.
It can, however, be deceiving and you need to know when to get out at the optimum time. It's 'strength' can lull you into a false sense of security.
It will be interesting to see where this leads, as it does follow in the footsteps of some guiding trailers.