[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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



PureBytes Links

Trading Reference Links

<x-html><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 5.50.3825.1300" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face="Courier New" size=2>First, let me set the scene!</FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>The input data is the OEX cash index from 
some time in</FONT></DIV>
<DIV><FONT face="Courier New" size=2>1996 to now taken on a 30 minute 
interval.&nbsp; For purposes</FONT></DIV>
<DIV><FONT face="Courier New" size=2>of this study I assigned a value of $300 
for each OEX</FONT></DIV>
<DIV><FONT face="Courier New" size=2>full point.</FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>The system was a modification of the old 
Aberration system</FONT></DIV>
<DIV><FONT face="Courier New" size=2>using an adaptive smoothed input series of 
closes (thanks</FONT></DIV>
<DIV><FONT face="Courier New" size=2>to an idea from Mark Brown of a while back) 
and +/-2 standard</FONT></DIV>
<DIV><FONT face="Courier New" size=2>deviations for entry long and short with 
exit at the average</FONT></DIV>
<DIV><FONT face="Courier New" size=2>line.</FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>This is what I used for "optimal f" 
computation.&nbsp; Note that</FONT></DIV>
<DIV><FONT face="Courier New" size=2>this averaged the total loss of up to three 
sequential losses</FONT></DIV>
<DIV><FONT face="Courier New" size=2>rather than just the simple single 
loss.&nbsp; This to get </FONT></DIV>
<DIV><FONT face="Courier New" size=2>around an earlier criticism about not fully 
adjusting for</FONT></DIV>
<DIV><FONT face="Courier New" size=2>a string of losses.&nbsp; However, I am 
inclined to think that a</FONT></DIV>
<DIV><FONT face="Courier New" size=2>moving average of losses would work better 
than either </FONT></DIV>
<DIV><FONT face="Courier New" size=2>average approach.</FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>&nbsp; If PositionProfit(1)&lt;0 then 
begin<BR>&nbsp;&nbsp;&nbsp; AvgLoss = 
AvgLoss*NumbLoss-PositionProfit(1);<BR>&nbsp;&nbsp;&nbsp; NumbLoss= 
NumbLoss+1;<BR>&nbsp;&nbsp;&nbsp; If PositionProfit(2)&lt;0 then 
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; AvgLoss = 
AvgLoss-PositionProfit(1)<BR>&nbsp;&nbsp;&nbsp; Else If PositionProfit(3)&lt;0 
then <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; AvgLoss = 
AvgLoss-PositionProfit(1)<BR>&nbsp;&nbsp;&nbsp; Else If PositionProfit(4)&lt;0 
then <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; AvgLoss = 
AvgLoss-PositionProfit(1);<BR>&nbsp;&nbsp;&nbsp; AvgLoss = 
AvgLoss/NumbLoss;<BR>&nbsp; End;<BR>&nbsp; if avgloss&gt;0 then Ncont = 
Round(RiskPerc*(InitCash+TotalProfit)/avgloss,0);</FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>And the following is what I used for Fixed 
Percent .</FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>&nbsp; Value1 = Stddev(Close, 
StdDevLn)*2*BigPointValue ;<BR>&nbsp; If Value1&gt;0 then Ncont&nbsp; = 
round(RiskPerc*(InitCash+TotalProfit)/Value1, 0);</FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>Here are some statistics for these two 
methods over</FONT></DIV>
<DIV><FONT face="Courier New" size=2>the range of approximately the same DOLLAR 
risks.</FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>Percentage risks are higher for Average 
Loss case since</FONT></DIV>
<DIV><FONT face="Courier New" size=2>the Average Loss is considerably higher 
than 2 times StdDev</FONT></DIV>
<DIV><FONT face="Courier New" size=2>through most of the period.&nbsp; The 
attached image shows each</FONT></DIV>
<DIV><FONT face="Courier New" size=2>loss over this period.&nbsp; In order the 
date, the amount of loss,</FONT></DIV>
<DIV><FONT face="Courier New" size=2>the "average" loss (as defined above), and 
2*StdDev.</FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>I don't know about you but I'm sure 
sticking with this</FONT></DIV>
<DIV><FONT face="Courier New" size=2>fixed percentage of account divided by 2 
times Standard</FONT></DIV>
<DIV><FONT face="Courier New" size=2>Deviation for determining bet 
size.</FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>Clyde</FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>&nbsp;FIXED PERCENTAGE OF ACCOUNT DIVIDED 
BY AVG LOSS<BR>&nbsp;<BR>&nbsp;%RISK&nbsp;&nbsp; NetPrft&nbsp; L:NetPrft&nbsp; 
S:NetPrft&nbsp;&nbsp;&nbsp; ROA&nbsp; <BR>&nbsp;11.00&nbsp;&nbsp; 56219.00&nbsp; 
118965.00&nbsp; -62746.00&nbsp; 166.32<BR>&nbsp;13.00&nbsp;&nbsp; 62739.00&nbsp; 
127912.00&nbsp; -65173.00&nbsp; 171.73<BR>&nbsp;15.00&nbsp;&nbsp; 54839.00&nbsp; 
123659.00&nbsp; -68820.00&nbsp; 131.52<BR>&nbsp;17.00&nbsp;&nbsp; 50520.00&nbsp; 
125055.00&nbsp; -74535.00&nbsp; 112.24<BR>&nbsp;19.00&nbsp;&nbsp; 70540.00&nbsp; 
151839.00&nbsp; -81299.00&nbsp; 147.19<BR>&nbsp;21.00&nbsp;&nbsp; 80118.00&nbsp; 
163475.00&nbsp; -83357.00&nbsp; 173.16<BR>&nbsp;23.00&nbsp;&nbsp; 65716.00&nbsp; 
162291.00&nbsp; -96575.00&nbsp; 125.69<BR>&nbsp;25.00&nbsp;&nbsp; 65639.00&nbsp; 
159729.00&nbsp; -94090.00&nbsp; 116.97<BR>&nbsp;27.00&nbsp;&nbsp; 65191.00&nbsp; 
164590.00&nbsp; -99399.00&nbsp; 106.38<BR>&nbsp;29.00&nbsp;&nbsp; 53265.00&nbsp; 
162720.00 -109455.00&nbsp;&nbsp; 82.59<BR>&nbsp;31.00&nbsp;&nbsp; 71063.00&nbsp; 
177374.00 -106311.00&nbsp; 118.09</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>&nbsp;%RISK&nbsp;&nbsp;&nbsp;&nbsp; 
MaxDD&nbsp;&nbsp;&nbsp;&nbsp; BigWTrd&nbsp;&nbsp; BigLTrd<BR>&nbsp;11.00&nbsp; 
-33801.00&nbsp;&nbsp; 32275.00 -16766.00<BR>&nbsp;13.00&nbsp; 
-36533.00&nbsp;&nbsp; 32275.00 -16766.00<BR>&nbsp;15.00&nbsp; 
-41696.00&nbsp;&nbsp; 38730.00 -16766.00<BR>&nbsp;17.00&nbsp; 
-45010.00&nbsp;&nbsp; 38730.00 -19551.00<BR>&nbsp;19.00&nbsp; 
-47924.00&nbsp;&nbsp; 45185.00 -19551.00<BR>&nbsp;21.00&nbsp; 
-46267.00&nbsp;&nbsp; 45185.00 -25149.00<BR>&nbsp;23.00&nbsp; 
-52284.00&nbsp;&nbsp; 45185.00 -25149.00<BR>&nbsp;25.00&nbsp; 
-56115.00&nbsp;&nbsp; 45185.00 -25149.00<BR>&nbsp;27.00&nbsp; 
-61280.00&nbsp;&nbsp; 51640.00 -25149.00<BR>&nbsp;29.00&nbsp; 
-64494.00&nbsp;&nbsp; 51640.00 -26068.00<BR>&nbsp;31.00&nbsp; 
-60179.00&nbsp;&nbsp; 51640.00 -26068.00<BR>&nbsp;</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2><BR>FIXED PERCENTAGE OF ACCOUNT DIVIDED BY 
STD DEV <BR>&nbsp;<BR>&nbsp;%RISK&nbsp;&nbsp; NetPrft&nbsp; L:NetPrft&nbsp; 
S:NetPrft&nbsp;&nbsp;&nbsp; ROA&nbsp; <BR>&nbsp; 1.00&nbsp;&nbsp; 
26418.00&nbsp;&nbsp; 53929.00&nbsp; -27511.00&nbsp; 181.14<BR>&nbsp; 
2.00&nbsp;&nbsp; 30361.00&nbsp;&nbsp; 60230.00&nbsp; -29869.00&nbsp; 
174.10<BR>&nbsp; 3.00&nbsp;&nbsp; 62974.00&nbsp; 102988.00&nbsp; -40014.00&nbsp; 
236.12<BR>&nbsp; 4.00&nbsp;&nbsp; 99460.00&nbsp; 145056.00&nbsp; -45596.00&nbsp; 
337.93<BR>&nbsp; 5.00&nbsp; 115231.00&nbsp; 180029.00&nbsp; -64798.00&nbsp; 
249.73<BR>&nbsp; 6.00&nbsp; 122285.00&nbsp; 213547.00&nbsp; -91262.00&nbsp; 
215.03<BR>&nbsp; 7.00&nbsp; 167405.00&nbsp; 279071.00 -111666.00&nbsp; 
247.38<BR>&nbsp; 8.00&nbsp; 169136.00&nbsp; 307220.00 -138084.00&nbsp; 
195.62<BR>&nbsp; 9.00&nbsp; 163406.00&nbsp; 322314.00 -158908.00&nbsp; 
160.74<BR>&nbsp;10.00&nbsp; 191363.00&nbsp; 384644.00 -193281.00&nbsp; 
170.63<BR>&nbsp;11.00&nbsp; 176102.00&nbsp; 395815.00 -219713.00&nbsp; 
133.62<BR>&nbsp;<BR>&nbsp;<BR>&nbsp;%RISK&nbsp;&nbsp;&nbsp;&nbsp; 
MaxDD&nbsp;&nbsp;&nbsp;&nbsp; BigWTrd&nbsp;&nbsp; BigLTrd<BR>&nbsp; 1.00&nbsp; 
-14584.00&nbsp;&nbsp; 13772.00&nbsp; -8383.00<BR>&nbsp; 2.00&nbsp; 
-17439.00&nbsp;&nbsp; 13772.00&nbsp; -8383.00<BR>&nbsp; 3.00&nbsp; 
-26670.00&nbsp;&nbsp; 19628.00 -10814.00<BR>&nbsp; 4.00&nbsp; 
-29432.00&nbsp;&nbsp; 27544.00 -16221.00<BR>&nbsp; 5.00&nbsp; 
-46142.00&nbsp;&nbsp; 38455.00 -27035.00<BR>&nbsp; 6.00&nbsp; 
-56868.00&nbsp;&nbsp; 41316.00 -32442.00<BR>&nbsp; 7.00&nbsp; 
-67671.00&nbsp;&nbsp; 55088.00 -48663.00<BR>&nbsp; 8.00&nbsp; 
-86461.00&nbsp;&nbsp; 61528.00 -54070.00<BR>&nbsp; 9.00 -101659.00&nbsp;&nbsp; 
68860.00 -59477.00<BR>&nbsp;10.00 -112149.00&nbsp;&nbsp; 82632.00 
-81105.00<BR>&nbsp;11.00 -131797.00&nbsp;&nbsp; 84601.00 -86512.00</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2><BR></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>- - - - - - - - - - - - - - - - - - - - - - 
- - - - - - - -<BR>Clyde Lee&nbsp;&nbsp; 
Chairman/CEO&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (Home of 
SwingMachine)<BR>SYTECH 
Corporation&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
email:&nbsp;&nbsp; &lt;</FONT><A href="mailto:clydelee@xxxxxxx";><FONT 
face="Courier New" size=2>clydelee@xxxxxxx</FONT></A><FONT face="Courier New" 
size=2>&gt; <BR>7910 Westglen, Suite 105&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
Work:&nbsp;&nbsp;&nbsp; (713) 783-9540<BR>Houston,&nbsp; TX&nbsp; 
77063&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
Fax:&nbsp;&nbsp;&nbsp;&nbsp; (713) 783-1092&nbsp;&nbsp;&nbsp; <BR>- - - - - - - 
- - - - - - - - - - - - - - - - - - - - - - -<BR></FONT></DIV>
<DIV><FONT face="Courier New" size=2>----- Original Message ----- </FONT>
<DIV><FONT face="Courier New" size=2>From: "Gary Fritz" &lt;</FONT><A 
href="mailto:fritz@xxxxxxxx";><FONT face="Courier New" 
size=2>fritz@xxxxxxxx</FONT></A><FONT face="Courier New" 
size=2>&gt;</FONT></DIV>
<DIV><FONT face="Courier New" size=2>To: &lt;</FONT><A 
href="mailto:realtraders@xxxxxxxxxxxxxxx";><FONT face="Courier New" 
size=2>realtraders@xxxxxxxxxxxxxxx</FONT></A><FONT face="Courier New" 
size=2>&gt;</FONT></DIV>
<DIV><FONT face="Courier New" size=2>Sent: Wednesday, March 01, 2000 
17:36</FONT></DIV>
<DIV><FONT face="Courier New" size=2>Subject: [RT] Re: Fixed Ratio or Fixed 
Fractional?? Pros and Cons of Each...</FONT></DIV></DIV>
<DIV><FONT face="Courier New"><BR><FONT size=2></FONT></FONT></DIV><FONT 
face="Courier New" size=2>&gt; &gt; Just for kicks, why would not WORST CASE 
DRAWDOWN<BR>&gt; &gt; to date be something to base the computation on 
rather<BR>&gt; &gt; than average loss or total loss in a string.<BR>&gt; 
<BR>&gt; Might work.&nbsp; Let us know what you find!<BR>&gt; <BR>&gt; &gt; 
That's what the Monte Carlo does. It assumes there is no<BR>&gt; 
</FONT></BODY></HTML>
</x-html>
Attachment Converted: "f:\eudora\attach\junk19.gif"