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Hi Howard,
thanks for yor answer which I agree with 100%.
The system I'm testing, scales at fixed price intervals.
For example: Entry at $15, scale in at $16, $17, $18 and exit at $19. In one bar price opens at $17.5 and closes at $20. In order to open at 17.5 and close at 20 I'm assuming that price has to go through 18 and 19( which is my profit target).
I know that there is the possibility to gap up, but I'm willing to make the assumption I made before.(I've traded this sistem live and this assumption is not irrealistic. It's a forex system and the pair very rarely gaps).
I'm already using 1 minute data for this but sometimes the last scale in signal triggers in the same bar that the profit target level.
In summary, I know that I have to make the assumption mentioned before, but if there was the possibility to change the default behaviour of AB it would be great.
thanks
--- In amibroker@xxxxxxxxxxxxxxx, Howard B <howardbandy@xxx> wrote:
>
> Hi Pedro --
>
> For any single bar, you know the values of four data points -- Open, High,
> Low, and Close. You know the time of two data points -- Open and Close.
> There is no way to determine the sequence in which any prices other than
> Open and Close occur.
>
> You can, within one bar do any of these things:
> 1. Buy the Open. Then exit at a stop, at a limit, or at the Close.
> 2. Buy sometime within the bar at a stop or at a limit. Then sell at the
> Close.
> 3. Buy at the Open. Then sell at the Close.
>
> These have no scaling. You are certain of enough information to make one
> entry and one exit. You cannot rely on assumptions of prices that would both
> buy and sell within a single bar -- that is after the open but before the
> close.
>
> It sounds like you need bars with finer resolution, then take the actions
> you can be sure of without ambiguity in each bar.
>
> Thanks,
> Howard
>
> On Tue, Feb 23, 2010 at 6:55 AM, Pmxgs <pmxgs@xxx> wrote:
>
> >
> >
> > Hello,
> >
> > in the system I'm coding I have several scale in signals and it's working
> > the way I expect, except at some bars which have both a scale in signal and
> > the sell signal (profit target).
> > I ran the backtest in the detailed log mode and from my understanding AB
> > first closes the position (based on the sell signal) and then opens a new
> > one (based on that scale in signal), which is not what I want.
> > I want to scale in first and after that close the position.
> >
> > I should note that I'm not trading at the close nor at the open. I scale in
> > at several prices inside each bar, and the scale in price in below the sell
> > price (in the case of a long position).
> >
> > Is it possible to change the default behaviour of AB, so that it scales in
> > first and only then, exit the position? (in these cases where we have both
> > signals on the same bar)
> >
> > thanks,
> > Pedro
> >
> >
> >
>
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