Accidents and evolution (Part three)
Never one for rhetoric; I presented a similar case, to those I have described in the prior posts, at a talk I did last year. Using a similar model we followed how that can evolve from a base set of criteria and environments to something more complex. The following two snap shots are from a control where we work at random and an evolved model a few generations on.
Here we are using £2 at random
Here we use an evolved model
I reckon I could replicate the performance of the two at an pre-determind date. But some of the performance will always be reliant on prevailing market conditions, but it’s the gap in performance that is the most interesting. The second benefits from picking the ‘right’ market, direction and exit models. It was only by studying why one performed better than the other that I was able to fully understand the reason and why that was important. You can then use than to hone other strategies.
Of course there an infinite amount of variables, so you need to point it in roughly the right direction. If you don’t know the direction, then do a binary chop to get there quicker. You also have the issue of course that the market can and will change. We recently saw the introduction of cross matching across many sports and that has changed the ‘environment’ to the point where I am sure some strategies have started to fail. This in turn will alter the behaviour of those people who are trying to avoid becoming dinosaurs. Sometimes however accidents in evolution produce strange results. On more than one occasion I’ve made an error on a spreadsheet and it has failed to do something I wanted. That in turn though created some unusual payoffs which lead me down paths I hadn’t considered exploring. Just another path on the road of evolution.
So while using a genetic algorithm is a useful trick, evolving doesn’t stop, it continues ad infinitum. If you stop evolving you may appear in the betting exchange equivalent of the natural history museum in a few years time.
Category: General, Trading strategies
