Jorgen, Interesting discussion. I have to admit that I'm finding it difficult to visualize exactly what you are suggesting. Would you mind posting a screen shot somewhere that we can see as an example of how you are using time frames differently...?
TIA --- In [email protected], "jorgen_wallgren" <jorgen.wallg...@...> wrote: > > Thank you Tomasz and Dennis for your input and comments! First of all, the > classic future leak error is taken care of, but it's not clear in the short > code example I gave. Thank you! > > Then I agree with what you say Tomasz, and my solution is not what we would > call a normal multiple timeframe system. But that's also the whole idea with > it. Because as a day trader I basically want to know what's going on every > mS. I don't sit and wait for a 1, 5 or 15 min bar to be completed before I > take a decision. I look at it and try to figure out where it's going. And > here is where my data sampling is created in such way it gives me continuous > timeframe data so I can tell with very high probability where the price is > heading. Then why waste chart space when all timeframe data can be in the > same chart! But to be clear and easy to interpret, it then has to have the > same resolution. > > The power of timeframes in day trading is when people using different > timeframes "start to agree" where the price should go- and as a result you > have high probability trades in front of you. But it's of course more to it > than that. :-) > > Regards, > > Jorgen > > --- In [email protected], "Tomasz Janeczko" <groups@> wrote: > > > > Hello, > > > > Thank you for your post. > > That kind of explanation of what you are after I was expecting and I am > > glad you posted it because > > now we can discuss facts not opinions. I was not expecting appologies, but > > just the information what you are after and you delivered > > it now. > > Thank you. > > > > To the matter - there seems to be some kind of misunderstanding what > > AmiBroker's built-in time frame functions > > are for. To make it straight - they are provided to build the systems based > > on many time intervals in exactly the same > > way as human would do, looking at 2 or more charts at the same time. > > Imagine you have the system that looks onto daily and weekly chart. That is > > exactly the purpose of time frame functions. > > So time frame functions allow you to get the "weekly" data from within > > "daily" chart. As in weekly chart, there is ONE > > open, ONE close, ONE high and ONE low PER WEEK. That is exactly what you > > would see on the weekly chart if > > you combined daily and weekly "by eye". > > Not only that, you will know weekly high/low and close values only when > > week has ended (on Friday close). > > And that is exactly how AmiBroker's timeframe functions work - they give > > you the value of higher timeframe > > at the bar when higher interval is completed. > > The manual > > http://www.amibroker.com/guide/h_timeframe.html > > gives example of so called "triple Elder screen" that combines signals > > generated in daily and weekly timeframes. > > > > What you are doing with your functions is different, you are not creating > > higher timeframe data at all. > > What you do is some gated data sampling. The following code will generate > > something like that, > > you will get upto 5 different "weekly" values per one week, instead of one, > > as you wanted: > > > > newframe = TimeFrameExpand( BarIndex(), inWeekly ); > > newframe = newframe != Ref( newframe, -1 ); > > > > SteppedHigh = HighestSince( newframe, High ); > > SteppedLow = LowestSince( newframe, Low ); > > > > Plot( SteppedHigh, "SteppedHigh", colorBlue ); > > Plot( SteppedLow, "SteppedLow", colorBlue ); > > Plot( C, "Price", colorBlack, styleCandle ); > > > > There are two caveats however: > > - such approach is not equivalent to "normal" mutiple timeframe system that > > only uses data from *completed* interval > > - as Dennis pointed out in his reply, such approach may very quickly lead > > to classic future leak error, > > because you may be using your "quick weekly" data before they are settled. > > > > (The above uses daily/weekly intervals for illustration purposes, but the > > same applies to any time frame). > > > > Best regards, > > Tomasz Janeczko > > amibroker.com > > ----- Original Message ----- > > From: "jorgen_wallgren" <jorgen.wallgren@> > > To: <[email protected]> > > Sent: Thursday, August 13, 2009 4:18 PM > > Subject: [amibroker] Re: TimeFrames: Is their use flawed? > > > > > > If I have offended you, I am sincerely sorry! AmiBroker is the best program > > available and I love working with it!!! Nothing wrong > > with AB!!! > > > > One of the reasons the TF Functions didn't do the job in my specific case > > was that my systems works with 1, 5 and 15 minute > > timeframes. In the chart I need to see (and save) all the values from all > > the TFs plotted with 1 minute resolution. Basically to > > plot the TF data as a staircase is probably the best way to display the > > results for easy viewing and it's actually often so that > > some TF values in a 1 minute resolutions often very closely follow a > > staircase pattern- such as a Moving Average. But the AB TF > > Functions gives me the last value for each period. I needed more. Now when > > I have all values in each period it reveals huge amount > > of information when the three time frames are plotted in one indicator with > > the same data resolution. For example instead of 1 value > > for a 15 minute period, I have now 15 values. > > > > Then I wouldn't like to go so far to prove my point by publish the work and > > system I have been working on for months. I have a > > system which seems to work rather well and I am sorry, but that one I will > > keep for myself. I could send anyone who wants a screen > > capture of the indicator with data from 3 TFs plotted. But such a screen > > capture could be faked. So I will instead give a short > > explanation how easy it is to create what I was looking for. And the reason > > it was easy to create, after I figured it out, was > > because AmiBroker is a great program with fantastic features. > > > > First of all, I use AB TF Functions to get the BarIndex in each TF. By > > having that I can tell when each TF has a new period, and any > > holes doesn't matter. Then I just go in a loop from first visible bar - as > > many bars I need extra, until end of the array. So in > > this loop when a new period is detected, I jump 1 step back and collect the > > values I need and the jump is equal to the TF I need > > data from. Here is a part of that code: > > if ( NewTFBar[i] ) > > { > > for ( n = i; Counter < Periods AND n >= 0 ; n-- ) > > { > > if ( NewTFBar[n] ) > > { > > SUMA = SUMA + Close[ n - 1 ]; > > if ( Counter < BBPeriods - 1 ) > > SUMB = SUMB + Close[ n - 1 ]; > > > > Counter++; > > } > > } > > Etc. > > I hope that settles it and again it's not my intention to talk bad about > > AmiBroker or to insult anyone. > > > > Regards, > > > > Jorgen > > > > > > > > --- In [email protected], "Tomasz Janeczko" <groups@> wrote: > > > > > > Hello, > > > > > > TimeFrame functions work perfectly. > > > You may not understand them but it is not the reason to send such > > > unjustified opinions. > > > > > > If you "wrote your own" why don't you publish your formulas so everyone > > > can judge? > > > Otherwise it is just plain useless talk. > > > > > > Best regards, > > > Tomasz Janeczko > > > amibroker.com > > > ----- Original Message ----- > > > From: "jorgen_wallgren" <jorgen.wallgren@> > > > To: <[email protected]> > > > Sent: Thursday, August 13, 2009 10:59 AM > > > Subject: [amibroker] Re: TimeFrames: Is their use flawed? > > > > > > > > > > Herman, I agree with you and I have the same questions. I have been > > > > working on a RT system using data from 2 additional time > > > > frames and the result was very clear! I can't use the AB TimeFrame > > > > Functions and get a system which works in real time and can > > > > also be properly be back tested. > > > > > > > > Therefore I wrote my own TimeFrame Function and now when I have the > > > > data from the 2 longer timeframes in the same resolution as > > > > my > > > > chart interval, 1 minute, everything works very well. > > > > > > > > Regards, > > > > > > > > Jorgen > > > > > > > > > > > > > > > > > > > > ------------------------------------ > > > > > > > > **** 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 > > >
