[amibroker] How does Amibroker work

["mrdavis9" <mrdavis9@xxxxxxxxxx>]

Jason, thanks for the input.  This next 
question is for anyone, and is about how Amibroker works.  What happens 
when I back up a chart so that June 2 (for instance) is  the last day 
showing at the right hand end of the chart.    Hasn't Amibroker 
completely forgotton the future knowledge that it aquired while it was in the 
future?  In other words, can't I visually backtest going foreward one bar 
at a time, and won't this method of looking at Zig ( or any other indicator) be 
exactly the same as when I download fresh daily data each day.   Ron 
D
 
 
<BLOCKQUOTE 
>
  ----- Original Message ----- 
  <DIV 
  >From: 
  Jayson 
  
  To: <A title=amibroker@xxxxxxxxxxxxxxx 
  href="">amibroker@xxxxxxxxxxxxxxx 
  Sent: Saturday, July 05, 2003 1:44 
  AM
  Subject: RE: [amibroker] SCANS FOR ZIG 
  CONDITIONS
  
  <SPAN 
  class=217324006-05072003>Ron,
  Zig 
  is great for seeing the past but the future......... you must be very careful. 
  Here is a good description from TA A-Z...
  <SPAN 
  class=217324006-05072003> 
  
  ZIG ZAG
  Overview
  The Zig Zag indicator filters out changes in an underlying 
  plot (e.g., a security's price or another indicator) that are less than a 
  specified amount. The Zig Zag indicator only shows significant changes.
  Interpretation
  The Zig Zag indicator is used primarily to help you see 
  changes by punctuating the most significant reversals.
  It is very important to understand that the last "leg" 
  displayed in a Zig Zag chart can change based on changes in the underlying 
  plot (e.g., prices). This is the only indicator in this book where a change in 
  the security's price can change a previous value of the indicator. Since the 
  Zig Zag indicator can adjust its values based on subsequent changes in the 
  underlying plot, it has perfect hindsight into what prices have done. Please 
  don't try to create a trading system based on the Zig Zag indicator--its 
  hindsight is much better than its foresight!
  In addition to identifying significant prices reversals, the 
  Zig Zag indicator is also useful when doing Elliot Wave counts.
  For additional information on the Zig Zag indicator, refer 
  to Filtered Waves by Arthur Merrill.
  Example
  The following chart shows the 8% Zig Zag indicator plotted 
  on top of Mattel's bar chart.
  <IMG height=268 
  src="gif00374.gif" width=380 
  NOSEND="1">
  This Zig Zag indicator ignores changes in prices that are 
  less than 8%.
  Calculation
  The Zig Zag indicator is calculated by placing imaginary 
  points on the chart when prices reverse by at least the specified amount. 
  Straight lines are then drawn to connect these imaginary 
  points.






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