Hello, Yes, there are many ways to skin a cat :-)
Best regards, Tomasz Janeczko amibroker.com On 2010-08-04 09:09, Rob wrote: > Dennis, > > Off the top of my head, and I've read the new posts on this thread quickly, > couldn't you achieve what you want by having two charts... one minimized, but > forced to refresh at timed intervals? That is possible I believe. Without > being on the right computer to check this, I believe RequestTimedRefresh() > allows you to force a minimized chart to refresh. I used to use this > technique myself before I went across to the AA technique (which I only did > because it allowed me to cycle through a watchlist of symbols). Using this > technique the minimized chart would not refresh on quotations, only when you > wanted it to. > > Rob > > --- In amibroker@yahoogroups.com, Dennis Brown<se...@...> wrote: >> Tomasz, >> >> I anticipated the use of more static arrays in my efforts to speed up my >> AFL. That was another one of my reasons for adding more RAM and looking to >> use W7 64 bit. RAM is the cheapest and easiest solution to more speed for >> me. >> >> You make a point, and perhaps there is some validity to using multiple >> charts as opposed to a single AA. Note my last comments to Herman about >> this possibility. >> >> Using AA does limit one to a single other process. Having multiple charts >> to do the computations gives a lot more flexibility in dealing with multiple >> timeframes with different history requirements. Quick AFL bars would be >> optimized for each chart. This could reduce the overall computational load. >> >> If on some future release, you enable multiple charts to execute on multiple >> cores, then this would provide a method for an AFL programmer to take >> advantage of parallel processing in a high level AFL way. >> >> Perhaps, I am in error in talking about charts in indicator mode all the >> time -- just because it is what I am familiar with. Perhaps there is >> already or could be another mode for AFL specifically to run on a time basis >> rather than event basis (other than AA), for solving problems like we have >> been discussing. >> >> I really am open to all ideas, even though I may not "get it" right-away at >> times. >> >> I am just brainstorming the possibilities in a simple high level model that >> I can understand. >> >> Thanks for listening, >> >> Dennis >> >> >> On Aug 3, 2010, at 8:35 PM, Tomasz Janeczko wrote: >> >>> >>> Hello, >>> >>> There are some drawbacks of using AA to process and store results in static >>> variables >>> a) static variables consume memory >>> b) you are locking AA window so you can't use it for something else >>> >>> Best regards, >>> Tomasz Janeczko >>> amibroker.com >>> >>> On 2010-08-04 02:25, Tomasz Janeczko wrote: >>>> Hello, >>>> >>>> Quite frankly I was saying that many users abuse chart formulas for doing >>>> stuff that should be placed elsewhere. >>>> I was also recommending to use AA/run-every to process offline instead of >>>> putting all code into charts >>>> long time ago, last time it was here: >>>> http://finance.groups.yahoo.com/group/amibroker/message/151513 >>>> >>>> and here: >>>> http://finance.groups.yahoo.com/group/AmiBroker-at/message/5131 >>>> >>>> but unfortunately no one seemed to be listening. >>>> >>>> Best regards, >>>> Tomasz Janeczko >>>> amibroker.com >>>> >>>> On 2010-08-04 01:44, Herman wrote: >>>>> The code doesn't execute faster in the AA. You are off-loading processing >>>>> from the indicator to the AA, i.e. let the indicator do the plotting and >>>>> let the AA do the calculations once a second. This is fast enough because >>>>> the only thing that changes on your chart is the last bar and you can >>>>> keep that "live" by plotting a single candle indicator. >>>>> >>>>> a very simple example: >>>>> >>>>> AA code, set to Current Symbol, All Quotations, Run-Every to 1 sec, and >>>>> run SCAN: >>>>> >>>>> Buy=Sell=Short=Cover=0; >>>>> StaticVarSet( "BBTop", BBandTop( C, 20, 2 ) ); >>>>> StaticVarSet( "BBBot", BBandBot( C, 20, 2 ) ); >>>>> >>>>> Indicator code: >>>>> >>>>> Plot( C, "", 1, 64 ); // this plot is live >>>>> Plot( StaticVarGet( "BBTop" ), "BBTop", colorBlue, styleLine ); // this >>>>> updates 1/sec >>>>> Plot( StaticVarGet( "BBBot" ), "BBBot", colorBlue, styleLine ); >>>>> >>>>> On my computer the Indicator part executes 3x faster plotting speeds up >>>>> the Indicator code 3x, AA 0.9 mSec, Indicator 0.3 mSec. Of course the >>>>> gains would be much greater with complex code. >>>>> >>>>> If anyone sees something wrong with the AA idea please speak up. It seems >>>>> to be too good to be true, usually there is something wrong when things >>>>> look too good ;-) >>>>> I am surprised no one critiqued this idea. There must be a negative side >>>>> to this... anyone? >>>>> >>>>> Herman >>>>> >>>>> >>>>>> Herman, >>>>>> Can you explain a little more about the indicator code vs >>>>>> AA code... is it identical...? I'm not entirely clear why >>>>>> it executes so much faster via the AA than an indicator in a chart. >>>>>> Many Thanks >>>>>> Rob >>>>> >>>>> >>>>>> ------------------------------------ >>>>>> **** IMPORTANT PLEASE READ **** >>>>>> This group is for the discussion between users only. >>>>>> This is *NOT* technical support channel. >>>>>> TO GET TECHNICAL SUPPORT send an e-mail directly to >>>>>> SUPPORT {at} amibroker.com >>>>>> TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at >>>>>> http://www.amibroker.com/feedback/ >>>>>> (submissions sent via other channels won't be considered) >>>>>> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: >>>>>> http://www.amibroker.com/devlog/ >>>>>> Yahoo! Groups Links >>>>> >>>>> >>> >>> > > > > ------------------------------------ > > **** IMPORTANT PLEASE READ **** > This group is for the discussion between users only. > This is *NOT* technical support channel. > > TO GET TECHNICAL SUPPORT send an e-mail directly to > SUPPORT {at} amibroker.com > > TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at > http://www.amibroker.com/feedback/ > (submissions sent via other channels won't be considered) > > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > http://www.amibroker.com/devlog/ > > Yahoo! Groups Links > > > >
