Originally posted by lcamargo
momo,
> You should be looking for those trades with high high
> probabilities of success.
The point is that, there is more than one way to achieve a given
return on investment:
EROI = t(RT + T â 1 )
As you said, you can use a system that provides a high probability of success (very high T). The problem is that such systems have a very low t for realistic values of R. This is the case of the system that you describe. If you make the calculations for your system, youâll see that the EROI per trade is 0.74%.
You can try to maximize t, but in real life youâll end up with a very low T. This is the case of systems that go for a home run.
Since I know the success rate of my system (T), what I like to do is to try to keep R constant by adjusting t.
I calculate all this after each trade. For example, Iâm currently sitting at R=2.67 and T=0.5833. I only trade OEX options and my target EROI is 10%.
Knowing this, t = 0.879. My goal for R is 3, so my stop will be at t/3 or about 3%.
At this point, I only need to be right 27.28% of the time to break even and 55% to achieve my target of 10% per trade. If I achieve 55% and everything stays the same and I invest the same amount of money per trade, Iâll double that amount in 20 trades.
>>The point is that, there is more than one way to achieve a given return on investment:<<
First I would like to say. I appreciate your viewpoint. However, I need to ask you this: Not trying to be sarcastic here.
What part of my commentary made you think that I was saying, that there wasn't "more than one way"??
My overall comments were NOT in reference to your meticulous mathematical approach to Investing.
They were in response to the other posters statements on Trading. The idea of even suggesting 50/50 chance is an acceptable ratio for placing a trade.
Secondly, I'd have to say, "Slow down Tiger..."
this statement by you: >>If you make the calculations for your system, youâll see that the EROI per trade is 0.74%.<<
Remember this quote, it helps me and will definitely help someone like yourself, someone obviously very analytically minded......
"Assumption - - is the Mother of All Fuck ups" ;-)
This is not "MY" system. Again, this is a system I'm testing aside
from my own. The very small tid bits of info that I offered up
in response to the other poster was there to give a construct
by which he could frame what I was talking about.
Now you are quoting me EROI percentages on this system
based on a few values expressed in a quick and dirty post...LOL
Don't get me wrong I see that you've put a lot of thought into
your calculations and obviously rely heavily on them to make
Investment decisions. I respect that. But before you can start telling me about EROI on a system you know nothing about.......
At least ask me for all the details about it!
Lastly, I don't expect you to answer this, but I think I need to know for my own edification.
Do you Trade for a living? Is it your sole source of income?
-momo