Re: [amibroker] Re: using LastValue() vs. [BarCount-1] (was using say("text") (AmiBroker 4.89.0 BETA released ))

["Tomasz Janeczko" <groups@xxxxxxxxxxxxx>]

LastValue does NOT cause loading ALL bars.
What LastValue does is to ensure that bars upto LAST BAR are loaded.
If you display say last 10 days in the chart it won't affect performance at all.

Best regards,
Tomasz Janeczko
amibroker.com
  ----- Original Message ----- 
  From: J. Biran 
  To: amibroker@xxxxxxxxxxxxxxx 
  Sent: Sunday, December 24, 2006 8:34 PM
  Subject: RE: [amibroker] Re: using LastValue() vs. [BarCount-1] (was using say("text") (AmiBroker 4.89.0 BETA released ))


  I am always reluctant of using LastValue() as I recall it slows things down by forcing loading all bars. 
  I use  Myvariable[BarCount-1] instead.

  1. Is there anything wrong with that?

  2. Does EndValue() suffer from same drawback as LastValue() (when no range is selected)?

  Joseph Biran
  ____________________________________________ 


------------------------------------------------------------------------------
  From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf Of Tomasz Janeczko
  Sent: Sunday, December 24, 2006 2:39 AM
  To: amibroker@xxxxxxxxxxxxxxx
  Subject: Re: [amibroker] Re: using say("text") (AmiBroker 4.89.0 BETA released )



  I would rather suggest using LastValue, instead of EndValue because EndValue depends on Range markers
  that may or may not point to the last bar.

  Best regards,
  Tomasz Janeczko
  amibroker.com
    ----- Original Message ----- 
    From: Ton Sieverding 
    To: amibroker@xxxxxxxxxxxxxxx 
    Sent: Sunday, December 24, 2006 10:35 AM
    Subject: Re: [amibroker] Re: using say("text") (AmiBroker 4.89.0 BETA released )


    Why Herman ? Say() works fine for me. Next a simple MA crossing system. Use 'Bar Replay' to walk thru the time array and you'l' get your 'Buys' and 'Sell' ...

    LongMA    = EMA( C, Param("Long Period", 50, 30, 100, 5 )); 
    ShortMA   = EMA( C, Param("Short Period", 5, 3, 50, 1 )); 
    Buy       = Cross( ShortMA, LongMA ); 
    Sell      = Cross( LongMA, ShortMA ); 
    if (EndValue(Buy)==1) Say("Buy"); 
    if (EndValue(Sell)==1) Say("Sell"); 

    Ton.

      ----- Original Message ----- 
      From: Herman 
      To: amibroker@xxxxxxxxxxxxxxx 
      Sent: Saturday, December 23, 2006 12:17 PM
      Subject: RE: [amibroker] Re: using say("text") (AmiBroker 4.89.0 BETA released )



      You need to store any text to ouput in a staticvar and clear this variable after you output it, below is just one way of doing this. This will only Say() text when is has changed. You may have to change this when you need repetative messages, like pyramided trades that say Buy, Buy, Buy, ...


      Text = ParamStr("Enter text to synthesize","Test");
      PrevText = StaticVarGetText("PrevText");
      if
      ( Text != PrevText ) 
      {
      Say( Text ); 
      StaticVarSetText
      ("PrevText", text); 
      }
        
      best regards,
      herman

        -----Original Message-----
        From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx]On Behalf Of J. Biran
        Sent: December 23, 2006 1:27 AM
        To: amibroker@xxxxxxxxxxxxxxx
        Subject: RE: [amibroker] Re: using say("text") (AmiBroker 4.89.0 BETA released )



        Thanks, I may be misunderstanding Flip but my guess is it should be the opposite,
        something like ExRem() to only sound message once on the first occurrence. 
        but I am not even sure what to include in that statement as arrays. 

            if condition say("my message");

        I would like to be said only once (the first time condition is true) and only on the last bar
        (which I will take care of after I figure out how to restrict this event).

        Joseph Biran
        ____________________________________________ 
------------------------------------------------------------------------
        From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf Of Chris DePuy
        Sent: Friday, December 22, 2006 7:22 PM
        To: amibroker@xxxxxxxxxxxxxxx
        Subject: Re: [amibroker] Re: using say("text") (AmiBroker 4.89.0 BETA released )


        I haven't done this yet, but Flip function should work.

          ----- Original Message ----- 
            From: J. Biran 
            To: amibroker@xxxxxxxxxxxxxxx 
            Sent: Friday, December 22, 2006 7:02 PM
            Subject: RE: [amibroker] Re: using say("text") (AmiBroker 4.89.0 BETA released )



            How does one use the say("text") function such that it is only
            stated once and does not repeat even if the condition that 
            it depends on continues to be true?

            Joseph Biran
            ____________________________________________

            --- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@xxx>
            wrote:
            >
            > Hello,
            > 
            > AmiBroker 4.89.0 BETA has just been released
            > http://www.amibroker.com/devlog/2006/12/21/amibroker-4890-beta-
            released/
            > 
            > Happy Holiday Season!
            > 
            > Best regards,
            > Tomasz Janeczko
            > amibroker.com


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