One has been watching youtube videos on tennis footwork with a view to improving Aubrey's squash game. Many videos talk about moving in to the ball rather than waiting. Apparently this is the secret of Federer's footwork with his walking step which just means, as far as I can see, hitting every shot as if it were an approach shot. Paul Gold has a series of 4 steps that he recommends. Using the eyes to watch the ball, and getting into an athletic position, taking a split step on every shot to take a proper first step, and getting to the ball with big steps pushing off the opposite foot to where the ball is going.

I wonder if these steps have a value for market people. Get prepared before the day with the proper equipment and study deciding whether you wish to buy or sell and which ones adjusting your trade level and size with the proper current volatilities and market movements and announcement. Trading and then preparing for the next shot…

Alston Mabry writes: 

The trading analogy for me is that I find myself in two basic modes: (1) reactive, waiting to see what's going to happen next, or (2) predictive, identifying what I think are the highest-probability paths over the next X time period, defining what I will do in each case and preparing for that action.

On the morale side, it's easy for lack or preparation or a losing trade to push me into mode (1); whereas getting back into mode (2) takes preparation, focus and discipline.

Anonymous writes: 

Related to the preparation stage of the game, it is interesting to pontificate about how many moves ahead board game players and sportspeople think and how the speculative game can be improved by adding this type of thinking.

I played basketball up to a fairly high level ( I played center for my state) and in that sport one only tried to anticipate one move ahead (to try and steal the ball or make the rebound).

My limited experience in tennis and squash leads me to think that the best in these games have time to think perhaps two moves ahead (Chair may have a view on that given that he has been known to hit the occasional hard squash ball just above the tin).

I read that chess and checkers players may think many moves ahead — perhaps all the way to a game's conclusion given an opponents error (or good move). Distinguished personages on this list might add meat to this point?

So, how many reactions ahead in the markets…? My various quantitative approaches likely have a substantially shorter holding period than most on the list so the following needs to be filtered by this fact:

* In terms of prediction, I have not been able to produce consistent alpha from any method that looks more than two steps ahead or behind (Market A's move effects Market A's future as well as Market B's future and Market A&B's move effects the future of Markets A,B & C)

* I guess one can also look at this in terms of degrees of freedom- more than 3 or 4 is probably too many. (Or to quote Arnold Zellner "…KISS….Keep it Sophisticatedly Simple)

* It might be a reasonable generality that the more steps ahead (or back) you look the longer needs to be your time frame.

Back more directly to Tennis & basketball. As a center in basketball I had two things to do in preparation. These were to be fully stretched out to jump high and to be completely focused on getting the ball to my pre- chosen team mate. When rebounding you have to commit before the shooter fully raises his arms. In tennis, the unbeatable ground strokes are often those hit on the rise — as it were. In both cases you have to anticipate to hit the perfect stroke or 'deny' the shooter.

The same in markets I think.

This comes back to being ready — obviously.

Pitt T. Maner III writes: 

I would wonder if there are specific training or virtual simulators (software) for traders that would be useful to identify and improve weak areas in preparation, execution, timing, psychological tendencies, etc.

For athletes and racquet players the analogy might be some type of virtual practice such as Virtual Tennis Academy where there would be actual analysis of footwork and stroke production in slow motion using attached sensors. With eventually perhaps some type of instant feedback (ie. sound, vibration) to cue the practicing player on what he or she is doing right.

Film analysis is becoming important in tennis as well.

A recent article, for instance, suggests that improvement in cognitive abilities in older persons is possible through the use of computer games:

"Commercial companies have claimed for years that computer games can make the user smarter, but have been criticized for failing to show that improved skills in the game translate into better performance in daily life1. Now a study published this week in Nature2 — the one in which Linsey participated — convincingly shows that if a game is tailored to a precise cognitive deficit, in this case multitasking in older people, it can indeed be effective."

The world of quantified self programs appears to be ever expanding. Why not financial and sports feedback too?

Charles Pennington writes: 

I tentatively have a theory that players stand way too far back to receive serve. One of the most awkward serve receives is a high backhand. But if you stand up close to the service line, perhaps halfway between the service line and the baseline, then you know that the ball is going to be bouncing nearby, and you can try to catch it low before it gets above your shoulders. If things go as planned, you'll punch the ball back and make the server have to scramble for the ball with little time to spare. However, I haven't really had a chance to try this out against a big server.

Anton Johnson writes: 

It is a joy to watch the masterful footwork of an accomplished base thief.

The speedster, with orders received, his eyes fixed on the pitcher, quickly side-steps, while never crossing his feet, feeling his way to tease the 12' danger zone. When sensing the pitcher suddenly whirl, with his weight biased to the left, he must cross right foot over left, to initiate the saving dive, and avert the embarrassment of a catastrophic pick-off.

However, when the enemy is committed, and with armed help at the plate, with explosive power he crosses left foot over right to continue the fight, knees powering forward, to slide just under the tag, to win the battle to own second base. 


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