http://www.amibroker.com/kb Providing you with tips & tricks for everyday AmiBroker use Sat, 17 Dec 2011 10:18:10 +0000 http://backend.userland.com/rss092 en From time to time we receive questions from customers wanting to buy new computer asking about recommended hardware / software configuration to run AmiBroker. We won't focus too much on the details here as hardware evolves very fast, instead we will give some general information that will help you make ... http://www.amibroker.com/kb/2011/10/25/recommended-hardwaresoftware-for-amibroker/ All developers of 3rd party plugin should NOT change the default project settings that are provided in sample projects in the ADK. If you change anything, you must make sure that you are using multi-threaded C runtime library as shown below: It is absolutely essential to check this setting, as the ... http://www.amibroker.com/kb/2010/11/19/third-party-plugins-must-use-multithreaded-run-time/ First of all it is absolutely necessary to run full setup on the new system to ensure proper configuration and appropriate access rights on the new system. Running full setup first is essential, as copying old files alone is NOT enough and will lead to problems. The setup program can be ... http://www.amibroker.com/kb/2010/09/07/how-to-migrate-amibroker-to-a-new-computer/ In general, to represent numbers with fractional parts, computers use a "floating point" binary representation. Floating point arithmetic is also used by AmiBroker for AFL calculations. For some more information about floating point representation in general see the following article, here we will only discuss some practical aspects. http://en.wikipedia.org/wiki/Floating_point Floating point calculations ... http://www.amibroker.com/kb/2010/07/20/about-floating-point-arithmetic/ IMPORTANT: This article applies ONLY to AmiBroker version 5.24 and earlier. Version 5.25 includes native support for log scale in Study() function and this workaround is no longer needed. Some of you may have tried using Study() function in logarithmic scale charts and noticed that the output of Study() function becomes ... http://www.amibroker.com/kb/2009/04/22/study-function-in-logarithmic-scale/ Sometimes when using low-level graphics functions it is needed to convert from bar number to pixel X co-ordinate and from price level to pixel Y co-ordinate. Converting between them needs knowing visible bar range, Y-axis value range and pixel dimensions of drawing area. Once these params are known it is ... http://www.amibroker.com/kb/2009/03/30/how-to-convert-from-bar-value-to-pixel-co-ordinates/ AmiBroker Formula Language (AFL) thanks to its array processing model is able to run at the same speed as code written in assembler (i.e. machine code). The following article explains how. AFL runs with native assembly speed when using array operations. A simple array multiplication like this: X = Close ... http://www.amibroker.com/kb/2008/08/12/afl-execution-speed/ That is the common question we receive through support channel, so even though it is explained in the LICENSE.TXT file that you have in your AmiBroker folder, let us make some facts straight. First take a look what the license says: "REGISTERED VERSION: One registered copy of the program may either be used ... http://www.amibroker.com/kb/2008/07/05/single-license-use-on-multiple-computers/ QuickAFL(tm) is a feature that allows faster AFL calculation under certain conditions. Initially (since 2003) it was available for indicators only, as of version 5.14+ it is available in Automatic Analysis too. Initially the idea was to allow faster chart redraws through calculating AFL formula only for that part which is ... http://www.amibroker.com/kb/2008/07/03/quickafl/ Recently on the AmiBroker mailing list some users expressed wish to have access to some of portfolio backtest metrics available in "historical" form (i.e. as date series, as opposed to scalars), so they can be plotted as an indicator. Implementing such functionality is actually easy with existing tools and does not ... http://www.amibroker.com/kb/2008/05/19/historical-portfolio-backtest-metrics/