I've been catching up on this thread. Your thinking isn't too shabby, a lot of clarity of thought. CM is a bit hard on you because he used to have to use a 14.4 modem to get his quotes list back in the day
Thanks for your reply!
Much of what I say is in general terms that is reduced down to more simplistic terms that is easy to understand in about 300-400 words. There are plenty of holes and generalizations in what I say, but I am trying to get a general point across rather than specifics.
5-8% per month as a figure is a decent figure to aim at - this is not fixed, there are plenty of people who manage to get higher than this in the short term. I am working on beating this figure through various low risk methods but I will hopefully come onto that another time.
Although Margin Call wasn't about forex, the point I wanted to emphasise was about the application of risk assessment to trading and how many retailers ignore it (generally misunderstanding money management as not risking more than 2% a trade) rather than the specifics of the instrument. The example served as an illustration of what I wanted to say next.
Nick Talebs book is one of the more interesting books I have read on the trading but yes, should not be followed verbatim. I am also aware that his fund isn't particularly high performing, but he has some great analogies that I borrowed because I felt that they emphasised the points I wanted to make, not that I thought that his trading style should be followed.
I fully understand what you saying, but I didn't want to mention/or argue about many of these points as they serve as illustrations to save a lot of verbiage - lots of my posts are wall of text as it is!
Conclusion to statistics posts
As cliff notes to previous few posts on statistics. I have made the following conclusions that I follow in my own trading. You may disagree with them, and apply other thoughts, but they have been instrumental in driving the way that I make money. There is a lot more in depth that you can go into - there are various books and online resources that can help. There is also software that is a shortcut for calculating odds but I recommend that you understand the principles behind them rather than just feeding your results into a computer. The interpretation (as in anything not just statistics) is very important if you are going to draw a conclusion. The conclusions I drew are this:
1. Losing an account/blowing account is far more probable that what win rates and loss rates indicate (see permutations)
2. Survivability grows accounts (with constant compounding) more efficiently than high risk systems
3. Despite systems repeatedly having an edge over the market, single systems or techniques are short lived and need to replaced to maintain an edge
4. Population studies show us other factors outside of mere win/loss rates and statistics influence profitability and drawdown and that these factors are very significant. Any trading should be taken on the side of caution.
Of course statistics are necessary to tell you whether your system will work or is worthwhile continuing with. Its incredibly important with technical trading but it equally tells us that winning 80% of the time with 2:1 win rate is not all there is to it.
My trading system is based a lot on surviving as this is what makes money as an investment.
Why have I emphasised this point? The issue is that even if you have a 75% win rate system with a 2:1 reward/risk ratio (which no one I have ever seen has achieved) it will still eventually blow up given enough time. If you trade 50% risk on that system it will blow up very quickly. If you trade 1000 times per day, it will blow up in a matter of months. No matter what system you use, no matter how great it sounds, if you do not understand that all systems have finite lifespans in the matter of trades that are rapidly shortened by trading many times per day or by increasing risk per trade, then you have missed the point. I have also made the point of looking at your own statistics and relating that to the theoretical statistics (either given by a guru or by backtesting) and questioning why there is a discrepancy. Is there something you are doing wrong, or is the fault of the system itself?
You might ask - why have I spent several posts discussing what I could have posted in one post - its because it serves to illustrate and emphasise certain points. You can quibble about small points but rather than discuss those I want to put forward my general ideas and I hope you find them useful.
This concludes the 'statistics' part as I want to move onto talking about other subjects in further posts.