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Tomasz -
Ive found the reason for the logarithmic graphs being plotted from
zero: the j-script function is returniung zero values.
So the problem isnt with the plotting, it seems that the new version
doesnt like this j-script code and just returns zero for the whole
array. I tested the same function on the previous version works fine.
Any ideas?
Andy
--- In amibroker@xxxxxxxxxxxxxxx, "andy_kovacs" <andy_kovacs@xxxx>
wrote:
> Tomasz -
>
> Some time back someone posted an excelent piece of trailing stop
> code "ATR BASED STOPS with JScript" which I have included in my
> systems. In the tests I did, this code gave better results than
the
> in-built function, so I kept using it rather than re-coding using
> the applystop function.
>
> My default for graph display in preferences is Logarithmic, but I
> dont actually draw the "price" indicator on the chart; I use plot
> (c,"Name of System: close=",colorblack,stylebar); This means I
have
> to tick the box "logarithmnic" in the gridlines part of the
> indicator window to get a logarithmic display.
>
> When the longstop and shortstop (the results of the java
functions)
> are plotted either side of the price, the graph is crammed right
at
> the top of the page and the scale starts from zero instead of some
> value near the minimum of the price range. As the graphs before
were
> normal, I hadnt noticed, but Ive just tested a few codes and each
> time I use the java trailing stop code the graph re-sets itself to
> start from zero in both normal and logarithmic mode (as set in
> indicator window, NOT preferences).
>
> When I edit out the plot(longstop,"etc........) and change the
> indicator window back to normal (untick box) the graph is still
> plotted from zero, but it looks fine. Just in log mode it squashes
> up at the top of the page and becomes unusable.
>
> Is this normal? Am I doing something wrong somewhere or is it a
> quirk of the program?
>
> Heres the code for the stops, but I guess you already know it....
>
> //********** ATR BASED STOPS with JScript *********//
>
> EnableScript("jscript");
>
> //first the raw stop functions are defined based on ATR-depending
> distance to the close price
>
> range = multiplier*ATR(Len);
> rawlongstop=C-range; //raw long stop
> rawshortstop=C+range; //raw short stop
>
> //two JScript functions for the stops are defined
> <%
> //function for the longstop
> function f_longstop(rawstop,baseprice,Length){
>
> //"importing" the AFL functions into JScript
> Len = AFL(Length);
> Ls=VBArray(AFL(rawstop)).toArray();
> bp = VBArray(AFL(baseprice)).toArray();
>
> //the stop is calculated in the loop
> for(i=Len+1;i<Ls.length;i++){
> if(bp[i]>=Ls[i-1]){Ls[i]=Math.max(Ls[i],Ls[i-1]);}
> }
>
> return Ls;
> }
>
> //function for the shortstop
> function f_shortstop(rawstop,baseprice,Length){
> //"importing" the AFL functions into JScript
> Len = AFL(Length);
> Ss=VBArray(AFL(rawstop)).toArray();
> bp = VBArray(AFL(baseprice)).toArray();
>
> //the stop is calculated in the loop
> for(i=Len+1;i<Ss.length;i++){
> if(bp[i]<=Ss[i-1]){Ss[i]=Math.min(Ss[i],Ss[i-1]);}
> }
> return Ss;
> }
> %>
> //*********** End of JScript *****************//
>
>
> Andy
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