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You need to closely read the doc on
"SetPositionSize"
SETPOSITIONSIZE
- set trade size |
Trading system toolbox
(AFL
2.70) |
| SYNTAX |
SetPositionSize( size, method )
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| RETURNS |
ARRAY |
| FUNCTION |
This function allows to control trade (position) size in
four different ways, depending on 'method' parameter.
Parameters:
size (ARRAY) defines desired trade size
method (ARRAY) defines how 'size' is interpreted
- spsValue (=1) - dollar value of size (as in previous versions)
- spsPercentOfEquity (=2) - size expressed as percent of
portfolio-level equity (size must be from ..100 (for regular accounts)
or .1000 for margin accounts)
- spsShares (=4) - size expressed in shares/contracts (size must be
> 0 )
- spsPercentOfPosition (=3) - size expressed as percent of currently
open position (for SCALING IN and SCALING OUT ONLY)
- spsNoChange (=0) - don't change previously set size for given bar
New SetPositionSize function automatically encodes new methods of
expressing position size into old "positionsize" variable as follows:
- values below -2000 encode share count,
- values between -2000 and -1000 encode % of current position
- values between -1000 and 0 encode % of portfolio equity
- values above 0 encode dollar value
Although it is possible to assign these values directly to old-style
PositionSize
variable, new code should use SetPositionSize function for clarity.
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See where it says:
values between -2000 and -1000 encode % of current position
values between -1000 and 0 encode % of portfolio equity
d
Is it possible to auto trade using a percentage of my account
balance
instead of a fixed number of shares?
For instance, could I
use sometime like this?
PositionSize=
-25;
ibc.PlaceOrder(
Name(), "Buy", "PositionSize", "MKT", 0,
0, "GTC", True );
I know
that the Parameter calls for quantity, but I would like to
order in 100
share increments using up to 1/4 of my account balance
including the
stocks already purchased for each order. However, it
would only purchase 4
stocks and the other orders would not be placed.
So that is I had a $10000
balance, each order would use $2500. If a
stock costs $20, the order would
be for 100, if another stock cost $10
the order would be for 200, and if
another stock costs $30 the order
would not be placed. If I had already
purchased 3 stocks, only the
first order would be placed. Is this
possible?
Thanks,
Tom
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