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[RT] Re: Fixed Ratio or Fixed Fractional?? Pros and Cons of Each...



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> Just for kicks, why would not WORST CASE DRAWDOWN
> to date be something to base the computation on rather
> than average loss or total loss in a string.

Might work.  Let us know what you find!

> That's what the Monte Carlo does. It assumes there is no
> correlation between the results of one trade and the next and that
> your realtime historical trade order was just a random chance
> (might not be true for all systems but it's true for mine). 

That's my biggest gripe about MC testing.  For my system at least, 
and I suspect for many/most, the trade order is NOT random chance.  
E.g. my system has been behaving VERY differently for the last 3 
months than it did in the 2 years of testing before that.  (And I 
**love** it!! :-)  The market is acting fundamentally differently 
than it did before -- more volatility, etc -- and that affects the 
trades that happen during this period.

I think many systems have "memory" like this.  E.g. take a simple 
breakout system.  It's going to tend to have a string of losses 
(fakeouts) followed by a big win when the market finally trends.  
That's not a random series.  MC testing of that will produce 
questionable results that do not necessarily reflect reality.

Gary