Warning: this post contains language that may be offensive to more delicate readers. Apologies to Tim for the repeat mention of the day job, I only use it for its usefulness in this context.
Sal,
For my style of trading I Iike "3-bears porridge volatility" (not too much, not to little but just right).
I like your maths-based approach - I go through similar myself - it's helpful in gaining an understanding of what's going on. My only problem with it was that i found for me it can become an end in itself and you get bogged down in interesting stuff at the expense of simplicity.
A very insightful post, thank you very much 0007. I've highlighted two particular points.
1. "3-bears porridge", what a brilliant analogy. I think I can apply that as a policy across much of what I'm aiming to develop, with the occasional appropriate adjustment to the 3-bears chairs (not too big, not too little, just right for me). A big change in my attitude towards trading as a result of reading T2W is to understand that there's a huge range of right responses to any one situation, and my goal is to develop a trading plan that finds answers that are right for me - both profitable and comfortable - 3 bears style.
2. Yes, it's very much true that the maths can become absorbing and distracting, I have exactly the same issues with my day job. I've learned to control it by setting a generous deadline to achieve a basic output, and keeping myself on track to deliver against that. Within that frame, I can delve a little deeper, meander down strange paths, etc, knowing that I can't go too far for too long before I've got to get on with delivering the basic output.
On the topic of maths and modelling, I've not really mentioned much about my methodology. As I'm an engineer by trade, my training in maths has gone quite deep, all aimed at building predictive models of massively complex states. One of my favourite concepts is that of second order partial differentiation. It's a crazy bit of calculus that shouldn't work, but does. If you don't know what that means, don't worry, you don't need to; if you do know what that means the chances are you carry too many pens in your top pocket and your trousers are too short.
Anything that has a second order partial differential in it has lots of moving variables, and the variables are not moving in proportion to each other. To get the answers that you want you hold one variable still while you twiddle with the other, then hold that variable still while you twiddle with the first. So today I'm holding many things still that I could twiddle with while I just concentrate on figuring out a profit-exit formula, once I've done that I'll hold profit-exit still while I twiddle with stop loss formula. After that I think I'll hold both my exit point formulae still while I look at entry points or something.
Eventually I'll have a bland set of formulae that could be easily tweaked to apply to any type of trade, on any platform, with any instrument, just by holding the relevant unaffected variables still and twiddling with the affected ones.
I was asked outside of these forums how can I test the profitability of my exit formulae when I'm entering into trades with a fair degree of randomness. My answer was that this technique is used to design aeroplane wing shapes. If it didn't work, planes couldn't fly, planes do fly, so it does work - and consistently so. It just doesn't make sense until you've twiddled all of the key variables.
Lol, sound the nerd alarm, my inner geek just got out of its cage...
Sal