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Hello,
In other words negative result tells you how much extra cash you would
need to deposit on your account
to keep trading. This is margin call. Either you deposit extra money or
you say good bye to your account.
Best regards,
Tomasz Janeczko
amibroker.com
On 2010-02-03 01:22, Tomasz Janeczko wrote:
Hello,
Well, certainly with $10000 account then in fact you should not trade
forex at all, because you are undercapitalized and this is straight way
to blow you account, at that is precisely what backtest results tell
you.
Best regards,
Tomasz Janeczko
amibroker.com
On 2010-02-02 21:07, İlhan Ketrez wrote:
[Attachment(s)
from =?UTF-8?Q?=C4=B0lhan_Ketrez?= included below]
Hello,
If I have 10,000 and if the initial margin is 1000, can't I
open
8 lots? Then what does the initial margin mean?
If Amibroker trades far away from margin call everything works
perfectly. For example if I have 100,000 and trade one contract, there
is no problem. Amibroker takes the position value, multiplies it with
the price difference... These are OK. The document you suggest mainly
explains these essential details and some basic concepts ( http://www.amibroker.com/kb/2006/08/09/amibroker-for-forex/) .
In forex & futures, the trick is to be able to trade near
limits without getting caught by the limits. And there is nothing in
Amibroker about these limits as far as I see. Moreover, it seems that
it is impossible to formulate a correct custom backtest procedure due
to improper handling of PositionSize and read-only Equity and Cash
variables in CBI.
I wonder your additional comments on the subject,
especially your answer to my first two questions. The final equity
becomes -378,320 with 10,000 initial equity with the same settings.
Attached you may find the formula file.
Best regards,
Ilhan
2010/2/2 Tomasz Janeczko <groups@xxxxxxxxxxxxx>
Hello,
You are using wrong settings.
> Contract number is 800
That is wrong. No forex broker would allow you to open 800 lots.
You should use SetPositionSize( 1, spsShares ); to ensure you are
trading one lot
(or what every lots you really trade).
You need to read this:
http://www.amibroker.com/kb/2006/08/09/amibroker-for-forex/
Best regards,
Tomasz Janeczko
amibroker.com
On 2010-02-02 18:37, İlhan Ketrez wrote:
Hello,
I am a registered user of Amibroker and have sent this problem to
Amibroker support before sending to the mailgroup.
By now, more than one week has passed and there is no reply.
I still do not want to believe that Amibroker cannot perform a correct
futures/forex bactest and I am afraid of hearing that it can't.
However, to me, my tests clearly indicate that there's something wrong
with the default behaviour of "futures mode" backtesting. Shortly, you
open a position, and as the position be exhausted you still have cash
in your account. Even after the position size goes below zero, you
still have cash and may open a position if you code accordingly.
Ability of the position size to go below zero may just be another
discussion topic. There is no such account in real life. Normally, the
position size does not change if the position is a winner and if the
position is a loser, it consumes the cash first, then consumes itself
down to the maintenance margin where the broker liquidates the position.
All in all, my request from Amibroker stuff is to either invalidate
my comments by writing a few sentences or clearly
accept
that Amibroker cannot perform a correct futures backtest
and stop misleading people.
Best regards,
Ilhan
2010/1/28 İlhan Ketrez <ketrezilhan@xxxxxxxxx>
[Attachment(s)
from =?UTF-8?Q?=C4=B0lhan_Ketrez?= included below]
Dear friends
I am trying to test a simple system and understand the
behaviour of Amibroker testing mechanism.
I have set up an AFL file very similar to the one
described here.
Testing period: 01.01.2008 - today
Initial equity: 1,000,000
Final equity: -38,033,810
The position size is -80.
Margin deposit: 1000.
First entry details are as follows:
Contract number is 800
Entry position size: 800,000. Cash: 200,000.
The details I find interesting are:
As the position grows position size also grows and cash continues as
200,000.
Later, position size goes below zero as cash floats constantly above
zero.
The default result in Amibroker is something impossible to encounter in
real life. (To go into a debt of 38 million)
I defined a real cash value and observed the difference via debugview.
Report and debugview log are attached including the
system
codes.
I hope to find a way to test correctly using Amibroker with your help.
Thank you very much in advance.
Regards,
Ilhan Ketrez
Attachment(s) from =?UTF-8?Q?=C4=B0lhan_Ketrez?=
1 of 1 File(s)
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