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@yahoogroups.com, Howard B <howardba...@...> 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 <pm...@...> 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 > > > > > > >
