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Tomasz,
I installed the current beta as you suggested and found that a bug/inconsistency I reported a while ago (http://finance.groups.yahoo.com/group/amibroker/message/143245) is still there.
In a nutshell: in ShowArrows context Status("actionEx") is set to
actionExAAShowArrows as expected BUT Status("action") is set to 0 (zero), which is an undocumented value.
Insert the following line in any indicator code to reproduce:
_TRACE("Action = " + WriteVal(Status("action"), 1.0) +", ActionEx = " + WriteVal(Status("actionEx"), 1.0));
This will screw up user code that relies on Status("action") returning a documented value, as it did screw up mine (see link above).
I ended up having this in my code:
if((Status("action") == actionBacktest) OR (Status("action") == 0))
{
Cheers,
Sergei
--- In amibroker@xxxxxxxxxxxxxxx, Tomasz Janeczko <groups@xxx> wrote:
>
> Hello,
>
> Wrong approach.
>
> Instead use user-definable backtest / optimization charts that are
> available since version 5.26.
> It does everything you want without scripting and without need to worry
> about synchronization.
>
> Excerpt from read me:
>
> CHANGES FOR VERSION 5.26.0 (as compared to 5.25.0)
> Implemented user-definable report charts
>
> Now it is possible for the user to create any number of charts that will
> be automatically generated and included in the backtest report.
>
> To add user-defined chart to the report, simply save your chart formula
> under "Report Charts" folder.
>
> That's all.
>
> Any formula present in the "Report Charts" folder will be executed after
> completion of the backtest using ~~~EQUITY as selected symbol.
>
> The beta ships with 3 sample charts:
> a) portfolio equity
> b) underwater equity (drawdown)
> c) profit table
>
> The charts are displayed in alphabetical order (using file name as a
> chart name).
>
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
>
> On 2010-02-21 15:06, wml67 wrote:
> >
> >
> > Hi, I'm trying to take snapshots of resulting equity curves during
> > Optimization.
> >
> > Here's a snippet of AA code:
> >
> > // ....
> >
> > MAlb = Optimize("MA lookback",15,5,30,5);
> >
> > // ....
> >
> > if (Status("action") == actionPortfolio)
> >
> > {
> >
> > bo = GetBacktesterObject();
> >
> > optPass = "MAlb" + MAlb; // optPass is unique string, containing info
> > on this optimizer pass
> >
> > StaticVarSetText("SVoptPass", optPass);
> >
> > bo.Backtest();
> >
> > oAB = CreateObject("Broker.Application");
> >
> > oAB.RefreshAll();
> >
> > // lots of processing, studying trades, creating custom metrics, etc
> >
> > // .................
> >
> > }
> >
> > A snippet of code from the indicator I have running in the active window:
> >
> > optPass = StaticVarGetText("SVoptPass");
> >
> > Plot(Foreign("~~~Equity", "C"), " Equity");
> >
> > _N(Title = optPass); // title of the chart = static var set in AA code
> >
> > oAB = CreateObject("Broker.Application");
> >
> > oAW = oAB.ActiveWindow;
> >
> > rc = oAW.ExportImage(optPass + ".png", 800, 600); // name of the file
> > = static var set in AA code
> >
> > The idea is obvious: when the data is ready, AA code generates
> > RefreshAll(), indicator code is thus invoked, it plots the curve and
> > exports the image. The name of the file and the title on the chart
> > should be equal.
> >
> > In fact this approach sorta works, but not entirely as expected.
> > Firstly, most of the times filename and the chart title don't match,
> > eg, filename is MAlb10 and the title of the chart is MAlb15. Sometimes
> > one chart with the same title appears several times under different
> > filenames. Some charts seem to be caught in mid-rendering or
> > something, etc etc.
> >
> > Now I should say I tried all methods of invoking RefreshAll() and
> > ExportImage() I know -- the one shown in the snippets above (for sheer
> > simplicity), its modification using CreateStaticObject, also tried this:
> >
> > OWSHShell = CreateObject( "WScript.Shell" );
> >
> > rc = OWSHShell.Run( "myscript.vbs", 4, False );
> >
> > , tried all possible combinations of these... The results varied a
> > little, but unfortunately none was reliable. I moved the code around,
> > tried moving ExportImage() part from indicator into AA code (very end
> > of Status("action") == actionPortfolio block) -- same stuff... I also
> > had this wild thought: maybe indicator code is somehow being
> > re-entered and enclosed it in the code below, but this didn't help
> > either:
> >
> > if (NOT Nz(StaticVarGet("_snapshot_running")))
> >
> > {
> >
> > StaticVarSet("_snapshot_running", True);
> >
> > // main indicator code
> >
> > StaticVarSet("_snapshot_running ", False);
> >
> > }
> >
> > I came to the conclusion that most function calls are asynchronous,
> > RefreshAll() is not guaranteed to be honored when it's issued,
> > rendering is not guaranteed to be finished when the next line of code
> > after Plot() is being executed and so forth. That's why AFL is so
> > quick, I guess...
> >
> > Now, if only I had a way to suspend the AA code for a sec yielding
> > processor time to other threads (like indicator), I could solve my
> > problem... (Tomasz? Not all code is real-time!) Synchronous version of
> > Plot() would also help.
> >
> > Any ideas, anyone? It's a shame to be so close to the solution yet
> > unable to reach it!!!
> >
> > Many thanks!
> >
> >
> >
> >
>
------------------------------------
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